A HIGHLY LINEAR CMOS G(M)-C BANDPASS FILTER WITH ON-CHIP FREQUENCY TUNING

A fourteenth-order CMOS transconductance-C (G(m)-C) bandpass filter wi th on-chip automatic frequency tuning is described, By using highly li near G(m)-C' integrators, the filter achieves 75 dB dynamic range over 700 kHz noise bandwidth, The measured intermodulation distortion (IM3 ) @ 600 kHz for a 4 V-pp input signal is only -61 dB. On-chip automati c frequency tuning provides more than 300% center frequency range (i.e ., 165-505 kHz) of the filter with +/- 1% frequency accuracy, The 0.7- mu m CMOS filter measures 4.8 mm(2) and consumes 70 mW from a single 5 V power supply.