Title :
A low-power, programmable bandpass filter section for higher-order filter-bank applications
Author :
Chawla, Ravi ; Graham, David W. ; Smith, Paul D. ; Hasler, Paul
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
We present a programmable continuous-time bandpass filter with center frequencies ranging from 100 Hz to 10 MHz fabricated in 0.51 μm CMOS processes operating at 3.3 V supply. This circuit is compact and low power (0.1 nW-15 μW). SNR was 86 dB and 72 dB at 1 MHz for 2nd- and 4th-order sections with Qs up to 70 (4th-order). We fabricated a 6th- and 10th-order filter-bank chip. We present results for higher-order filters programmed at 1 MHz with Butterworth coefficients (passband ripple <0.5 dB).
Keywords :
Butterworth filters; CMOS analogue integrated circuits; Q-factor; band-pass filters; channel bank filters; continuous time filters; integrated circuit design; low-power electronics; network topology; power consumption; programmable filters; 0.1 nW to 15 muW; 0.5 micron; 100 Hz to 10 MHz; 3.3 V; Butterworth coefficients; CMOS processes; continuous-time bandpass filter; filter design; filter topology; higher-order filter-bank chip; low-power bandpass filter section; passband ripple; programmable bandpass filter section; Application software; Band pass filters; CMOS process; CMOS technology; Chebyshev approximation; Circuit optimization; Frequency; Power engineering and energy; Q factor; Transfer functions;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465003
