Linear-phase filters configured as a combination of sigma-delta modulator, SC transversal filter and a low-Q biquad

30 December 2002

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 1306-1309
https://doi.org/10.1109/iscas.1993.393970

Abstract

The combination of a /spl Sigma/-/spl Delta/ modulator-based finite impulse response (FIR) filter and a low-Q biquad is shown to be capable of achieving similar specifications to those of a pure FIR filter several times longer if both are implemented in analog form and therefore suffer from imperfect coefficient-matching. The proposed hybrid filter provides a cost-effective way of implementing linear-phase filters in analog form.

Keywords

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