Title :
A highly linear CMOS Gm-C bandpass filter with on-chip frequency tuning
Author :
Chang, Zhong Yuan ; Haspeslagh, D. ; Verfaillie, J.
Author_Institution :
Alcatel Bell Telephone, Antwerp, Belgium
fDate :
3/1/1997 12:00:00 AM
Abstract :
A fourteenth-order CMOS transconductance-C (Gm-C) bandpass filter with on-chip automatic frequency tuning is described. By using highly linear Gm-C integrators, the filter achieves 75 dB dynamic range over 700 kHz noise bandwidth. The measured intermodulation distortion (IM3) @ 600 kHz for a 4 Vpp input signal is only -61 dB. On-chip automatic frequency tuning provides more than 300% center frequency range (i.e., 165-505 kHz) of the filter with ±1% frequency accuracy. The 0.7-μm CMOS filter measures 4.8 mm 2 and consumes 70 mW from a single 5 V power supply
Keywords :
CMOS analogue integrated circuits; band-pass filters; circuit tuning; continuous time filters; integrating circuits; intermodulation distortion; 0.7 micron; 165 to 505 kHz; 5 V; 70 mW; CMOS transconductance-C bandpass filter; center frequency range; dynamic range; intermodulation distortion; linear Gm-C integrator; noise bandwidth; on-chip automatic frequency tuning; Automatic frequency control; Band pass filters; Bandwidth; Distortion measurement; Dynamic range; Intermodulation distortion; Nonlinear filters; Power measurement; Power supplies; Tuning;
Journal_Title :
Solid-State Circuits, IEEE Journal of
