Dallas, TXMULTIPLEXING SEVERAL INTEGRATOR capacitors onto a single opamp, and application to the design of a bank of secondorder MOS switched capacitor filters will be discussed. The resultant sharing of two opamps among the several filter channels reduces the power and area requirements for filter banks compared to earlier approaches, while increasing the modularity of the IC design and layout. The technique has several immediate speech processing applications, such as vocoders, and speech/speakcr recognitio…
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