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Author

C.A. Lish

Bio: C.A. Lish is an academic researcher. The author has contributed to research in topics: Filter (video) & High-pass filter. The author has an hindex of 1, co-authored 1 publications receiving 3 citations.

Papers
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Journal ArticleDOI
TL;DR: The design of a switched-capacitor filter that optimizes both amplitude and phase response simultaneously is described, conceptually derived from a Lerner function.
Abstract: The design of a switched-capacitor filter that optimizes both amplitude and phase response simultaneously is described. Conceptually derived from a Lerner function, the filter architecture is efficient and simple.

3 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a pole-sharing technique was used for implementing bandpass filter banks using the non-minimum-phase Lerner approximation without placing additional speed requirements on the operational amplifiers and without resorting to complicated clocking strategies; only a biphasic clock was used.
Abstract: A pole-sharing technique was used for implementing bandpass filter banks using the nonminimum-phase Lerner approximation without placing additional speed requirements on the operational amplifiers and without resorting to complicated clocking strategies; only a biphasic clock was used. Substantial hardware saving has been achieved. The filter synthesis is shown to be micropower-compatible and parasitic-insensitive; phase reversal was easily accommodated while retaining all desirable features. A uniformly and nonuniformly spaced filter bank for typical speech applications have been simulated with SWITCAP and three channels of the uniformly spaced filter bank have been constructed on a breadboard using discrete components. The results obtained agreed with design specifications, yielding a good approximation to linear phase in the passband and sharp attenuation in the stopband. Single-parameter and statistical multiparameter sensitivity analyses are presented. >

12 citations

Proceedings ArticleDOI
07 Jun 1988
TL;DR: In this article, a switched-capacitor time-division-multiplexed pole sharing technique for implementing bandpass filter banks is proposed, which is parasitic-insensitive and compatible with micropower techniques.
Abstract: A switched-capacitor time-division-multiplexed pole sharing technique for implementing bandpass filter banks is proposed. Using this technique, the hardware reduction is achieved in three ways. First, the efficient non-minimum-phase Lerner filter approximation is used to minimize the number of poles required to satisfy a given filter specification in frequency and time domains. Second, the number of poles is reduced by pole sharing and third, hardware for implementation is simplified by time-division-multiplexing. In the case of the 8th-order-per-channel 16-channel bandpass filter bank example discussed, the total hardware reduction is substantially greater than 50% when compared to a conventional direct design using minimum-phase filter approximations. Furthermore, the proposed technique is parasitic-insensitive and compatible with micropower techniques. >

3 citations