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Electronic Circuits and Systems, IEE Journal on

Issue 5 • Date September 1978

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Displaying Results 1 - 7 of 7
  • Self dual l.t.a. filters

    Publication Year: 1978 , Page(s): 137 - 142
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (644 KB)  

    In this paper self-dual linear transformation active (l.t.a.) filter structures are introduced. The general linear transformation approach is constrained to this end to produce the necessary and sufficient conditions for self duality from which active-RC realisations of given lossless ladder filters are effected. Further degrees of freedom within the self-dual concept are then effectively utilised... View full abstract»

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  • Even-degree elliptic function monolithic crystal filters

    Publication Year: 1978 , Page(s): 143 - 146
    Click to expandAbstract | PDF file iconPDF (352 KB)  

    In monolithic crystal filter design even-degree elliptic function lowpass prototypes of the types designated b and c have been used. However, monolithic crystal filters designed from the original evendegree elliptic function are not only feasible but also more selective. An example of the filter, using cascade synthesis, is given. View full abstract»

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  • Some results on the nature of a 2-dimensional filter function possessing certain symmetry in its magnitude response

    Publication Year: 1978 , Page(s): 147 - 153
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (871 KB)  

    Constraints on analogue and digital two-dimensional filter functions so that they possess various symmetries like quadrantal symmetry and circular symmetry in their magnitude responses are derived. An ideal circularly symmetric separable magnitude squared function is obtained. Approximation of the ideal function in analogue and digital domain is carried out and the contour plots of the responses o... View full abstract»

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  • Erratum: Experimental study of the radar cross-section of maritime targets

    Publication Year: 1978
    PDF file iconPDF (72 KB)  
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  • Computer-aided cascade synthesis of passive networks

    Publication Year: 1978 , Page(s): 155 - 158
    Click to expandAbstract | PDF file iconPDF (455 KB)  

    Livsic's theory on the decomposition of the state space into invariant subspaces is combined with the QR algorithm for finding the eigenvalues of the state-variable matrix to yield an efficient method for computer-aided synthesis of passive networks. The synthesis is presented for scattering and transfer-scattering matrices which are widely used in practical problems. View full abstract»

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  • Fast adaptation of equaliser and desired response for digital data receivers

    Publication Year: 1978 , Page(s): 159 - 166
    Click to expandAbstract | PDF file iconPDF (828 KB)  

    The paper considers the design of the equaliser and the desired overall system impulse response (d.i.r.) for various types of detection algorithms used to recover digital data which has suffered intersymbol interference. The joint optimisation of the equaliser and desired response is formulated using a mean-square error cost. A constraint on the desired response is introduced which enables simple ... View full abstract»

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  • Minimising the effects of filter overlap in multiband signal/noise improvement systems

    Publication Year: 1978 , Page(s): 167 - 171
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (531 KB)  

    Multiband signal processing is used in complementary audio noise-reduction systems to overcome the effects of the wideband noise modulation that occurs during changes of gain. Because practicable filters with a finite cutoff rate must be used to define each signal band, changes in the relative gains of adjacent signal bands in the frequency spectrum give rise to distortion in the overall amplitude... View full abstract»

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Aims & Scope

The IEE Journal on Electronic Circuits and Systems was published by the IET between 1976 and 1979.

Full Aims & Scope