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  • Theoretical Limitations on the Broad-Band Matching of Arbitrary Impedances

    Publication Year: 1961, Page(s): 165
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

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  • A practical method of designing RC active filters

    Publication Year: 1955, Page(s):74 - 85
    Cited by:  Papers (142)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    IN THE FREQUENCY range below about 30 cps, the dissipation factors of available inductors are generally too large to permit the practical design of inductance-capacitance (LC) or resistance-inductance-capacitance (RLC) filter networks. The circuits described in the following pages were developed and collected to provide an alternative method of realizing sharp cut-off filters at very low frequenci... View full abstract»

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  • On the Design of Filters by Synthesis

    Publication Year: 1958, Page(s):284 - 327
    Cited by:  Papers (49)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4333 KB)

    Following an introduction to the methods and significance of filter design, this paper deals with definitions and filter synthesis according to prescribed attenuation requirements. It shows how the characteristic function for cases of practical importance can be calculated, particularly for the special cases 1) where this function is a power term in the frequency variable (maximally flat), 2) wher... View full abstract»

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  • Stability and Power-Gain Invariants of Linear Twoports

    Publication Year: 1962, Page(s):29 - 32
    Cited by:  Papers (203)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    It is shown that the stability of a linear twoport is invariant under arbitrary lossless terminations, under interchange of input and output, and under "immittance substitution," a transformation group involving the arbitrary interchanging of impedance and admittance formulations at both ports. The quantityk = frac {2 Re (gamma_{11}) Re (gamma_{22}) - Re(gamma_{12} gamma_{21})} {|gamme_{12} g... View full abstract»

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  • Weighted Least-Squares Smoothing Filters

    Publication Year: 1953, Page(s):197 - 203
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (723 KB)

    This paper differs from many others on least square filtering, in that no explicit note has been taken of the noise spectrum, at least no more than is taken when one fits a curve of least squares to a set of data. The concept of a least weighted error, not new in curve fitting, has, to the author's knowledge, never before been applied to a filter-- other workers have uniformly weighted their signa... View full abstract»

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  • On Nonuniform Sampling of Bandwidth-Limited Signals

    Publication Year: 1956, Page(s):251 - 257
    Cited by:  Papers (299)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    The purpose of this investigation is to examine four special nonuniform sampling processes in detail, and to deduce some interesting properties of bandwidth-limited signals. The main results are contained in four generalized sampling theorems. These theorems not only contain the nature of determination (unique-specification, over-specification, and underspecification) of signals but also include e... View full abstract»

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  • The Scattering Matrix in Network Theory

    Publication Year: 1956, Page(s):88 - 97
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    This paper gives an introductory treatment of the concept and uses of scattering methods in network problems. The scattering parameter description for linear networks is defined and the utility of this formalism for problems involving power flow in terminated networks is discussed. Examples of scattering computations for transformer 4-ports, transformerless impedance matching networks and transduc... View full abstract»

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  • Some Extensions of Liapunov's Second Method

    Publication Year: 1960, Page(s):520 - 527
    Cited by:  Papers (369)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    >In the study of the stability of a system, it is never completely satisfactory to know only that an equilibrium state is asymptotically stable. As a practical matter, it is necessary to have some idea of the size of the perturbations the system can undergo and still return to the equilibrium state. It is never possible to do this by examining only the linear approximation. The effect of the no... View full abstract»

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  • Matrix Analysis of Oscillators and Transistor Applications

    Publication Year: 1958, Page(s):181 - 188
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    The use of matrix techniques leads to the classification of feedback, harmonic oscillators into four basic types. The oscillator is considered to be made up of two two-port networks: one contains the active element; the other, the feedback network. The equations for oscillation are expressed in terms of the two-port parameters. The method is applied specifically to the Hartley and Colpitts oscilla... View full abstract»

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  • Negative-Impedance Converters

    Publication Year: 1957, Page(s):124 - 131
    Cited by:  Papers (41)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The conditions under which an active device exhibits an input impedance at one terminal pair which is exactly the negative of the load impedance connected to the other terminal pair are discussed. There are an infinite number of ways by which such a device, which is called a negative-impedance converter (NIC), can be made. One of the limits of this set is represented by a transistor circuit which ... View full abstract»

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  • Definitions of 'Bandwidth' and 'Time Duration' of Signals Which Are Connected by an Identity

    Publication Year: 1956, Page(s):286 - 288
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (249 KB)

    In this paper we give definitions of "equivalent time duration"Deltatauand "equivalent bandwidth"Delta fand show that they are connected by a simple reciprocal identity. An example is given and it is shown that the same concepts can be applied in antenna theory to give useful definitions of "equivalent aperture distribution width" and "equivalent angular spectrum." View full abstract»

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  • A Study of Rough Amplitude Quantization by Means of Nyquist Sampling Theory

    Publication Year: 1956, Page(s):266 - 276
    Cited by:  Papers (141)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1288 KB)

    Quantization is an operation that takes place when a physical quantity is represented numerically. It is the assignment of an integral value to a physical quantity corresponding to the nearest number of units contained in it. Quantization is like "sampling-in-amplitude," which should be distinguished from the usual "sampling-in-time." The probability density distribution of the signal is sampled i... View full abstract»

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  • The Gain and Stability of Linear Two-Port Amplifiers

    Publication Year: 1962, Page(s):240 - 246
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    In this paper the problem of obtaining maximum gain at a given stability factor is considered. It is assumed that the terminations and the complex feedback(y_{12})are variable by means of passive networks, and it is shown that for matching terminations the maximum gain, for a given stability factorS, is(S + 1/S)^{2} G_{u}, whereG_uis the unilateralized g... View full abstract»

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  • Physical Realizability Criteria

    Publication Year: 1960, Page(s):50 - 68
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1520 KB)

    The main objective of this paper is to present a brief survey of the theory of linear, passive, time-invariant n-ports both from an axiomatic standpoint and a synthesis point of view. hthe first approach the n-port is defined in terms of its behaviour in real-time and its steady-state behaviour is deduced as a logical consequence. In the second approach the network is restricted, apriori, to be of... View full abstract»

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  • Noise in Negative-Resistance Amplifiers

    Publication Year: 1960, Page(s):166 - 170
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (503 KB)

    Negative-resistance amplifiers that consist of a noisy negative resistance imbedded in a lossless three-terminal-pair linear network to make a two-port amplifier are analyzed. It is shown that Haus and Adler's noise measureM_{e}, is not constrained to lie between two eigenvalues of a noise matrix, as is the case for bona fide two-port amplifiers. Instead, it is always equal to its optim... View full abstract»

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  • A Survey of Network Realization Techniques

    Publication Year: 1955, Page(s):291 - 297
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    This paper is a brief survey of network realization techniques, from a general point of view. By realization techniques is meant methods of finding explicit networks (configurations and element values) from prescribed characteristics (such as impedance functions) which can be realized exactly. The statement of conditions under which prescribed characteristics are realizable is included in the defi... View full abstract»

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  • Solving Steady-State Nonlinear Networks of 'Monotone' Elements

    Publication Year: 1961, Page(s):99 - 104
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    This paper treats the problem of finding the steadystate currents and voltage drops in an electrical network of twoterminal elements, each of which has the property that its current-vs-voltage-drop graph, or "characteristic," is a curve going upward and to the right. (Thus, "tunnel diodes" are excluded, but nonlinear resistances, current and voltage sources, rectifiers, etc. are permitted.) The co... View full abstract»

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  • Special Synthesis Techniques for Driving Point Impedance Functions

    Publication Year: 1955, Page(s):302 - 308
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    An important problem in network design is the synthesis of driving-point impedance functions. As is well known, O. Brune was the first to state the necessary and sufficient conditions for physical realizability. Unfortunately, the synthesis technique which he proposed leads in general to perfectly coupled transformers. This is true also in the ease of the contributions made later by S. Darlington.... View full abstract»

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  • Some Properties of Time Varying Networks

    Publication Year: 1960, Page(s):69 - 78
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    In this paper, the general theory of reactance amplifiers is exemplified, with attention centered on three aspects. 1. Why may gain be obtained from a nonlinear reactance and not from a nonlinear resistance? 2. Where there is gain and feedback, the possibility of oscillation exists. But the situation is more complex than it is with vacuum tube amplifiers because the feedback path is through the mo... View full abstract»

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  • Analysis and Synthesis of Nonlinear Systems

    Publication Year: 1960, Page(s):459 - 469
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    The input-output relation of linear systems (convolution integral) is generalized to a class of nonlinear systems. This class is represented by analytic functionals as studied by Volterra and Fréchet. The analysis can be performed by measuring the response of nonlinear systems to series of impulse functions. The synthesis involves linear systems, zero-memory nonlinear systems and multiple mul... View full abstract»

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  • First-Order Estimation and Precorrection of Parasitic Loss Effects in Ladder Filters

    Publication Year: 1962, Page(s):385 - 399
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1424 KB)

    A method of estimation and approximate precompensation for the effects of element losses in resistance-terminated LC circuits is presented. Some new theorems are utilized for the special case of ladder networks. The process is valid for a nonuniform distribution of losses; there is, however, a limit to the amount of loss that can be compensated for. The procedure is based on a simple expression gi... View full abstract»

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  • A Discussion on the Transient Analysis of Coaxial Cables Considering High-Frequency Losses

    Publication Year: 1962, Page(s):144 - 152
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1111 KB)

    The physical processes of HF loss are discussed. Two cases in transient analysis for coaxial cables are presented; the first considers skin effect in plated conductors while the second is an analysis based upon an attenuation approximation of the form (frequency)^m,0 < m < 1. A graphical transient analysis technique is described which allows one to easily analyze cables... View full abstract»

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  • Nonlinear Distortion in Feedback Amplifiers

    Publication Year: 1962, Page(s):2 - 6
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (535 KB)

    Consider a feedback amplifierFwith a nonlinear output deviceT_0and an open-loop amplifier A having the same gain and the same output deviceT_0. If the gains of the forward amplifieruand feedback networkbetaare independent of frequency, it is well known that under the usual conditions the nonlinear distortionzetaofFdue to<... View full abstract»

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  • Nonlinear control systems with random inputs

    Publication Year: 1954, Page(s):9 - 18
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (643 KB)

    The describing-function method for the analysis of nonlinear systems with sinusoidal inputs is interpreted as a mean-square quasi-linearization technique and is generalized to apply to random signals. An amplitude-sensitive (or zero-memory) nonlinearity is interpreted as being approximately equivalent to a linear frequency-insensitive device, and a formula is derived for its equivalent gain. A sim... View full abstract»

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  • On the Classification of Boolean Functions

    Publication Year: 1959, Page(s):176 - 186
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Two Boolean functions which differ only by permutation and complementation of theirninput variables belong to the same symmetry class. Methods are described for determining the number of symmetry classes for functions ofnvariables, and for ascertaining whether or not two functions belong to the same class. This classification is achieved via a complete set of invariants, char... View full abstract»

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  • Negative Impedance Circuits--Some Basic Relations and Limitations

    Publication Year: 1957, Page(s):132 - 139
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    Much of the current interest in negative impedance circuits is directed toward potential applications as components of transmission networks-filters, equalizers, and similar structures. To permit maximum flexibility in the analysis and design of such structures, a complete specification of the characteristics of the negative impedance circuit is required. Four parameters are required for such a sp... View full abstract»

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  • Survey of Some Properties of Linear Networks

    Publication Year: 1957, Page(s):70 - 78
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (877 KB)

    An attempt is made to give a brief exposé of some modern works on linear network properties. The concepts treated are the following: passivity, stability, efficiency, and nonreciprocity;n-terminal-pair networks and two-terminal-pair networks in particular are studied at a fixed frequency. View full abstract»

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  • RC Active Networks Using Current Inversion Type Negative Impedance Converters

    Publication Year: 1957, Page(s):140 - 144
    Cited by:  Papers (57)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The RC active filter, which has been established by J. G. Linvill, has a circuit configuration of a negative impedance converter sandwiched between two RC networks. This paper deals with a new circuit also using two RC networks and a converter, but its configuration is based on the parallel or series connection and the converter must be a current-inversion type. The main results obtained here are ... View full abstract»

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  • The Z-Matrix Parameters of Tapered Transmission Lines

    Publication Year: 1962, Page(s):132 - 135
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (371 KB)

    This paper presents an improved method of computing theZ-matrix parameters of 2-port tapered transmission lines. Linear second-order differential equations, in which the tapering information is contained in one variable coefficient, are derived for the transfer immittances; from the solutions of these the driving point impedances are found by differentiation and algebraic substitution t... View full abstract»

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  • Wide-Band Feedback Amplifiers

    Publication Year: 1957, Page(s):178 - 190
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1448 KB)

    An approach to the problem of the design of transistor wide-band feedback amplifiers is given. Choice of feedback circuit configurations for the stabilization of amplifier circuit transconductance, transresistance, voltage gain, and current gain are discussed in terms of an idealized phase-reversing amplifier. A composite stage including two transistors which may be made to approach this idealized... View full abstract»

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  • Synthesis of Transmission-Line Networks and the Design of UHF Filters

    Publication Year: 1955, Page(s):325 - 336
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    Recently, Richards proved the remarkable fact that the synthesis of networks consisting of resistors and lossless transmission-lines with finite electrical length may be treated exactly the same way as in the case of conventional linear passive networks. This paper offers a new synthesis of this kind without mutual induction and its application to the design of uhf filters having Tchebyscheff char... View full abstract»

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  • A New Theory of Cascade Synthesis

    Publication Year: 1961, Page(s):244 - 260
    Cited by:  Papers (64)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1472 KB)

    This paper presents a new result generalizing Richards' theorem. It is shown that this result leads to a complete, simple and unified theory of cascade synthesis which yields the types A, B, Brune, C and D sections in a direct and natural manner. The element values of the various sections are obtained in closed form in terms of three or six indexes. Thus the extraction cycle is performed once and ... View full abstract»

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  • Q Factors of a Transmission Line Cavity

    Publication Year: 1957, Page(s):3 - 5
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB)

    On investigating the properties of a transmission line cavity, new expressions for theQfactor and logarithmic decrementdeltawere derived, and were compared with the expressions for a single shunt or series LCR circuit. It was expected that the expressions forQand{pi}/{delta}would be very similar, if not the same, as is the case with LCR circuits. That th... View full abstract»

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  • Neutralization and unilateralization

    Publication Year: 1955, Page(s):138 - 145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (683 KB)

    ALTHOUGH various methods of neutralization have been employed for several years in vacuum-tube circuits,1 the unilateralization technique was introduced only recently. This technique is based on a study of the linear, active, four-terminal network theory, which has become increasingly important in the design of transistor circuitry. Although neutralized circuits are usually treated as conventional... View full abstract»

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  • On the Stability of Time-Varying Linear Systems

    Publication Year: 1962, Page(s):420 - 422
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

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  • A Note on Stable, Physically Realizable, Linear, Time Invariant Systems

    Publication Year: 1962, Page(s):405 - 408
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (453 KB)

    A time invariant system is said to be physically realizable if its unit impulse responseh(t)is zero fort < 0. It is often assumed, in treatments of physical realizability, that the Fourier transform ofh(t)is square integrable(L_2(-infty, infty)). Some use is then made of the regularity of the transform, for real frequencies, to derive further properti... View full abstract»

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  • On Causality, Passivity and Single-Valuedness

    Publication Year: 1962, Page(s):87 - 89
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

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  • Transistor Blocking Oscillator Analysis

    Publication Year: 1961, Page(s):473 - 479
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (786 KB)

    Two commonly used basic transistor blocking oscillator circuits are considered: 1) a common-emitter with collector-to-base transformer coupling, and 2) a common-base circuit with collector-to-emitter transformer ccupling. The pulse widths of the blocking oscillators are assumed to be dependent on the transistor and circuit parameters rather than external timing devices, i.e., delay lines. Also the... View full abstract»

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  • Two-Stroke Oscillators

    Publication Year: 1960, Page(s):387 - 398
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1408 KB)

    A four-stroke oscillator, whether symmetrical or moderately dissymmetrical, is one in which the linear, conservative elements receive energy from the source two times per period; such are typically a Class A vacuum tube oscillator, a Class C push-pull oscillator, or a clock with anchor escapement. This paper presents a number of nonlinear, second-order differential equations which correspond to tw... View full abstract»

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  • Exact Design of Transistor RC Band-Pass Filters with Pre-scribed Active Parameter Insensitivity

    Publication Year: 1960, Page(s):313 - 320
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    The design of low-frequency band-pass filters by means of RC rejection networks in the feedback path of active elements has long been known. The advent of the transistor has renewed interest in this field and has necessitated a more exact synthesis procedure. The reason for this is that in the classical design, the active element is assumed to be an ideal voltage amplifier with infinite input impe... View full abstract»

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  • Unit Real Functions in Transmission Line Circuit Theory

    Publication Year: 1960, Page(s):247 - 250
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (402 KB)

    A new class of functions is introduced which has a direct physical significance in transmission line theory. These are called "unit real" (u. r.) and are derivable by bilinear transformations from positive real (p. r.) functions. The complex reflection coefficient is a unit real function of the "line vector"exp(-2jtheta), wherethetais the electrical length of a section of lin... View full abstract»

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  • RC Constant-Argument Driving-Point Admittances

    Publication Year: 1959, Page(s):310 - 317
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (721 KB)

    This paper deals with a class of RC driving-point immittances characterized by nearly constant argument over an extended frequency range. These arguments may have an average value between the limits zero andpi/2radians. Networks having near constant argument are of importance in shaping the phase character of the forward gain in feedback systems. These networks have arguments that oscil... View full abstract»

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  • Bounded Real Scattering Matrices and the Foundations of Linear Passive Network Theory

    Publication Year: 1959, Page(s):102 - 124
    Cited by:  Papers (108)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2312 KB)

    In this paper the most general linear, passive, time-invariantn-port (e.g., networks which may be both distributed and non-reciprocal) is studied from an axiomatic point of view, and a completely rigorous theory is constructed by the systematic use of theorems of Bochner and Wiener. Ann-portPhiis defined to be an operator inH_n, the space of alln View full abstract»

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  • A Synthesis Procedure for Transmission Line Networks

    Publication Year: 1958, Page(s):172 - 181
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    Richards has shown that by a suitable frequency transformation, networks composed of transmission lines all of a fixed length and resistors behave over a range of frequencies zero tof_0as lumped constant networks behave over the frequency range zero to infinity. In this paper the synthesis procedure of a general class of lossless filters using transmission line components is considered.... View full abstract»

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  • Instability in Two-Port Active Networks

    Publication Year: 1958, Page(s):133 - 139
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (746 KB)

    The general bilateral, two-port active network, defined by itsy, h, z, orgparameters, is treated for arbitrary terminations and external feedback with and without transformers. Stability considerations necessary for amplifier design are first discussed. These considerations are then extended to the design of instability, and the concept of maximum potential instability with e... View full abstract»

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  • Synthesis of a Class of Strip-Line Filters

    Publication Year: 1958, Page(s):104 - 109
    Cited by:  Papers (80)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    This paper describes a design theory for a class of strip-line filters on an insertion loss basis. The important part of the paper is the equivalent transformations showing the close correspondence between lumped and coupled-line distributed parameter circuits. An introduction is provided for clarification. Line type, low-pass ladder, high-pass ladder, and band-pass ladder type filters are realize... View full abstract»

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  • Power Gain and Stability

    Publication Year: 1957, Page(s):339 - 340
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (249 KB)

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  • On the Identification Problem

    Publication Year: 1956, Page(s):277 - 281
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (554 KB)

    The identification problem involves the determination of the identity of a black box from the observation of its responses to a set of input signals. In this paper attention is focused on the identification of zero-memory multipoles and two-poles of classn_1. The test signals are sine waves of different amplitudes and frequencies, and the measured quanity is the describing function of t... View full abstract»

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  • Signal Theory

    Publication Year: 1956, Page(s):210 - 216
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (958 KB)

    It is suggested that much of the subject matter now lumped under the heading of "circuit theory" might better be called "system theory," which in turn may be separated into three subdivisions-that which deals with the representation of the physical elements; that which deals with the representation of the signals, and that which deals with the representation of the transformations and relations be... View full abstract»

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  • Realizability Theorem for Mid-series of Mid-shunt Low-pass Ladders Without Mutual Induction

    Publication Year: 1955, Page(s):320 - 325
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    This paper treats the synthesis of nondissipative low-pass ladders without mutual induction. Necessary and sufficient conditions for physical realizability of mid-series or mid-shunt nondissipative low-pass ladders without mutual induction are presented here and the complete proof is given. The essence of the conditions imposed upon the input impedance of the network terminated in a pure resistanc... View full abstract»

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