Active-Gm-RC bandpass filter with 60MHz center frequency and a combined analog-digital tuning system

Abstract

An active-Gm-RC bandpass filter (BPF) with a combined analog-digital tuning system is presented. The active-Gm-RC BPF biquad features a positive feedback capacitor to enhance the quality factor, and its required number of OTA per filter-order becomes 0.5. A design example for the application to an on-chip equivalent SAW filter with 60MHz center frequency… (More)

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