By Topic

Includes the top 50 most frequently accessed documents for this publication according to the usage statistics for the month of

  • Active low-pass filter design

    Publication Year: 1965, Page(s):104 - 111
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (675 KB)

    The characteristics of Bessel, Butterworth, and Chebyshev filters are briefly reviewed. The "Rauch" RC active low-pass filter configuration is described and design formulae are obtained. Tables of normalized capacitor values are provided for Bessel, Butterworth, and ±½ dB, ±1 dB, ±2 dB, and ±3 dB Chebyshev filters. Two examples indicate the use of the tables. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Push-pull class-AB transformerless power amplifiers

    Publication Year: 1963, Page(s):6 - 14
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB)

    One of the major problems in power-amplifier design is to combine high efficiency with thermal stability. Class-C operation with current drive is one possibility but distortion level is high due to crossover and nonlinearity of hFE. A new diode-compensation method is described which allows high efficiency Class-AB operation for maximum output and lowest distortion and with excellent the... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The RC amplifier-type active filter: A design method for optimum stability

    Publication Year: 1964, Page(s):66 - 71
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (455 KB)

    The RC amplifier filter has many advantages over its passive RLC counterpart for low-audio frequency or narrow-band applications. The major disadvantage to an active filter has been its sensitivity to component tolerance and drift, particularly where high Q's are involved. A design method is presented which optimizes transmission stability when the probable "drift" (tolerances, temperature and agi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low distortion and high thermal stability in transistor audio power amplifier

    Publication Year: 1964, Page(s):26 - 29
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (423 KB)

    Two paramount objectives in the design of a high-quality transistor audio power amplifier are attaining good linearity and ensuring good thermal stability. Conflicts frequently arise in realizing these objectives in that steps taken to achieve one tend to worsen the other. This paper examines these two subjects to determine the essential conditions which must be fulfilled in order for the objectiv... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Loudspeaker testing in reverberant rooms

    Publication Year: 1963, Page(s):34 - 40
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (849 KB)

    In the diffuse sound field of a reverberant room acoustical intensity is directly proportional to the acoustical power emitted by a source and inversely proportional to absorption in the room. If the room and microphone characteristics are known, pressure response curves of loudspeakers can be plotted which are proportional to the total acoustical power radiated by the loudspeakers. The instrument... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Notes on how phase and delay distortions affect the quality of speech, music and sound effects

    Publication Year: 1964, Page(s):23 - 25
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (271 KB)

    Phase and delay distortions in the reproduction of speech and music have always been an important consideration in the design of high-quality systems. Early authoritative literature indicated this type of distortion could be disregarded. In 1935, events occurred in which phase delay in a two-way loudspeaker severely distorted sound effects. From this observation, a research program was set up to e... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Thermal and power considerations in class B transistorized amplifiers

    Publication Year: 1965, Page(s):88 - 95
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (501 KB)

    Output power of a Class B transistorized amplifier, driving a complex load impedance, as limited by maximum junction temperature, is discussed. Peak instantaneous power dissipation and the maximum average power dissipation are studied as functions of power factor and drive level. The peak instantaneous power dissipation is investigated, in conjunction with thermal limitations, to derive a design c... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An analysis of the frequency response of the magnetic recording process

    Publication Year: 1965, Page(s):61 - 65
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The Preisach model for magnetic particle interaction in recording tapes is used as a basis for the calculation of the frequency response of the ac biased magnetic recording process. These results are compared with experiment. Since there are numerous other factors present in normal tape recording which affect the frequency response, the tape was spaced away from the recording head; thus, the effec... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Minimizing interference effects in Tweeters and Tweeter-Woofer combinations

    Publication Year: 1964, Page(s):30 - 35
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (935 KB)

    Point-source vs large-area tweeters are analyzed in terms of phase interference. Theoretical analysis shows that the desired upper frequency limit as well as the dispersion angle place a limit on the maximum dimension of a tweeter diaphragm. Also, phase interference is analyzed in the crossover region in woofer-tweeter combinations. This interference is shown to be a function of the physical displ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Two-channel power amplifier circuits of the parallel type

    Publication Year: 1964, Page(s):89 - 94
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (653 KB)

    A new power amplifier is described which amplifies both stereo signals by means of a single push-pull-like pair of transistors or tubes. This circuit is derived from the parallel-type push-pull amplifier and combines to advantage, especially its output-transformerless operation, with the possibility of controlling the stereo effect or producing an unlimited number of phantom stereo signals. All ba... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Conditions for optimum noise performance of transistor amplifiers with a reactive source

    Publication Year: 1965, Page(s):15 - 22
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (622 KB)

    When driven from a purely reactive source, conventional noise figure is undefined for a two-port network such as an audio amplifier. In order to assess the noise performance of small-signal amplifiers driven from reactive sources such as capacitor microphones, a signal-to-wideband-average-noise ratio is defined. It is shown that for transducers where output is related to internal reactance by a si... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pitch perturbation detection

    Publication Year: 1965, Page(s):9 - 14
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Pitch perturbations are defined as normally minute variations in the lengths of adjacent pitch periods of voiced speech. It has been shown that perturbations increase in size and number in the presence of laryngeal abnormalities such as cancerous growths. Previous studies have been limited by the unavailability of electronic equipment of sufficient accuracy to perform the pitch measurements in rea... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

This Transactions ceased production in 1965. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope