A 70-500MHz Programmable CMOS Filter Compensated for MOS Nonquasistatic Effects

We present a fifth order Chebyshev singly-terminated ladder filter with a band-edge frequency programmable from 70-500 MHz implemented in a 0.35 mum CMOS process. It uses constant-capacitance scaled Gm-C integrators, and features a technique for compensation of MOS nonquasistatic effects. Also incorporated in the design is a robust fixed-transconductance bias circuit. The filter has a dynamic range of 52 dB and consumes 100 mW from a 3.3 V supply