Title :
A 21.4 MHz Gm-C bandpass filter in 0.8 μm digital CMOS with on-chip frequency and Q-factor tuning
Author :
Chou, Orlando H W ; Franca, JoséE ; Vital, João C. ; Leme, Carlos A. ; Martins, Rui P.
Author_Institution :
Fac. of Sci. & Technol., Macau Univ., Macau
Abstract :
A Gm-C 4th order bandpass filter with on-chip automatic frequency and Q-factor tuning is realized in 0.8 μm digital CMOS. The filter operates at nominal 21.4 MHz center frequency but can also be tuned to cover the frequency range from 15 to 30 MHz. It occupies 0.48 mm2, and at 5 V supply it dissipates 15 mW, achieves 62 dB signal-to-noise ratio in the passband, -43 dB intermodulation distortion and a 3rd order intercept point of 24 dBm for a 3 Vpp input overdrive signal
Keywords :
CMOS integrated circuits; Q-factor; VHF filters; band-pass filters; circuit tuning; continuous time filters; mixed analogue-digital integrated circuits; radiofrequency filters; 0.8 micron; 15 mW; 15 to 30 MHz; 21.4 MHz; 4th order bandpass filter; 5 V; 62 dB; CMOS IC; Gm-C bandpass filter; active filters; automatic frequency tuning; digital CMOS process; onchip Q-factor tuning; onchip frequency tuning; transconductance; Band pass filters; Circuit optimization; Circuit simulation; Digital filters; Inductors; Q factor; Resonant frequency; Resonator filters; Transconductors; Tuning;
Conference_Titel :
Analog and Mixed IC Design, 1997. Proceedings., 1997 2nd IEEE-CAS Region 8 Workshop on
Conference_Location :
Baveno
Print_ISBN :
0-7803-4240-2
DOI :
10.1109/AMICD.1997.637197
