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CMOS switched-capacitor filters for a PCM voice CODEC

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2 Author(s)

Three switched-capacitor circuits are described which perform all filtering functions in a PCM voice CODEC. They use novel integrators and/or state-variable sections, which desensitize the overall response against stray-capacitance effects. All filters are fully integrated on a CMOS test chip. The basic design considerations and the measured performance are discussed.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:14 ,  Issue: 6 )