Title :
A new CMOS tunable transconductor dedicated to VHF continuous-time filters
Author :
Assi, Ali ; Sawan, Mohamad ; Raut, Rabin
Author_Institution :
Ecole Polytech. de Montreal, Que., Canada
Abstract :
A new CMOS transconductance (Gm) circuit with voltage-tunability and very wide bandwidth is proposed and analysed. The transconductance circuit is then used to realize a tunable VHF 2nd-order bandpass filter cell. The center frequency (f0) of the designed filter can be tuned by varying the transconductance value (gm) of the tunable Gm circuit. Simulation results indicate the excellent performances of both the transconductance circuit and the filter over a wideband range. The transconductance value can be tuned from 40 μS to 950 μS (490 μS) and the filter center frequency (f0) in the range 30 MHz (4 MHz)-110 MHz (49 MHz) for ±2.5 V (±1.5 V) supply voltages
Keywords :
CMOS analogue integrated circuits; VHF filters; band-pass filters; circuit tuning; continuous time filters; -2.5 to 2.5 V; 4 to 110 MHz; 40 to 950 muS; CMOS tunable transconductor; VHF continuous-time filters; center frequency; filter center frequency; second-order bandpass filter cell; supply voltages; transconductance value; voltage-tunability; Band pass filters; Bandwidth; Circuit simulation; Frequency; Transconductance; Transconductors; Tunable circuits and devices; Tuned circuits; VHF circuits; Voltage;
Conference_Titel :
VLSI, 1997. Proceedings. Seventh Great Lakes Symposium on
Conference_Location :
Urbana-Champaign, IL
Print_ISBN :
0-8186-7904-2
DOI :
10.1109/GLSV.1997.580525
