Title :
Tunable capacitors for digital CMOS compatible high frequency analog filters
Author :
Allbutt, G.J. ; Nairn, D.G.
Author_Institution :
Dept. Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
At high frequencies, the tunable range of traditional gm-C filters is severely reduced due to short channel effects. To allow tuning at high frequencies, a tunable capacitor based on the intrinsic capacitances of a MOSFET transistor can be used. A prototype filter, based on this concept, was tunable from 29-36 MHz, with a dynamic range of 23 dB, and a maximum power dissipation of 30 mW
Keywords :
CMOS analogue integrated circuits; active filters; capacitance; capacitors; circuit tuning; radiofrequency filters; 29 to 36 MHz; 30 mW; MOSFET; digital CMOS compatible HF filters; dynamic range; gm-C filters; high frequency analog filters; intrinsic capacitances; prototype filter; short channel effects; transconductance-C filters; tunable capacitors; tunable range; Capacitance; Capacitors; Circuit optimization; Digital filters; Frequency; Linearity; MOSFET circuits; Threshold voltage; Transconductors; Tunable circuits and devices;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.539815
