Title :
A 50 MHz high-Q bandpass CMOS filter
Author :
Manetakis, K. ; Toumazou, C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
A high-speed bandpass continuous-time CMOS biquad filter based on the Gm-C technique is presented. The filter is to be used in a bandpass Sigma-Delta modulator with central frequency 50 MHz. The quality factor Q of the filter is about 50. One of the most important specifications is the Spurious Free Dynamic Range (SFDR) which is a measure of the filter´s immunity to spurious signals from third-order nonlinearities. Simulation results predict a SFDR of about 34 dB with Q=50 and power dissipation 12.5 mW. The design is based on a triode-region transconductor with negative resistance load and is designed for high tunability
Keywords :
CMOS analogue integrated circuits; Q-factor; active networks; band-pass filters; biquadratic filters; continuous time filters; negative resistance devices; sigma-delta modulation; 12.5 mW; 50 MHz; Gm-C technique; continuous-time CMOS biquad filter; high-Q bandpass CMOS filter; negative resistance load; power dissipation; quality factor; sigma-delta modulator; spurious free dynamic range; third-order nonlinearities; triode-region transconductor; tunability; Band pass filters; Delta-sigma modulation; Dynamic range; Educational institutions; Frequency modulation; Power dissipation; Q factor; Threshold voltage; Transconductance; Transconductors;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608718
