Title :
Two new VHF tunable CMOS low-voltage linear transconductors and their application to HF GM-C filter design
Author :
Muñoz, F. ; Torralba, Antonio ; Carvajal, R.G. ; Ramírez-Angulo, J.
Author_Institution :
Dept. de Ingenieria Electron., Seville Univ., Spain
Abstract :
Two new CMOS low-voltage linear transconductors for High Frequency (HF) applications are presented. They use tunable floating voltage sources between the input and the transistor gates of each inverter that forms the transconductor proposed by Nauta (1992). Two implementations of the floating batteries are presented. The proposed transconductors operate under constant low voltage supply as low as 1.2 V and transconductance and output resistance are independently tunable. It is suitable to be used in HF continuous time filters with programmable center frequency and quality factor. To this end, simulation results of a 10.7 MHz band-pass gm-C filter operating at a voltage supply of 1.5 V and large input swing are presented
Keywords :
CMOS analogue integrated circuits; VHF filters; band-pass filters; biquadratic filters; circuit simulation; circuit tuning; continuous time filters; integrated circuit design; low-power electronics; programmable filters; 1.2 V; 1.5 V; 10.7 MHz; HF GM-C filter design; HF continuous time filters; VHF tunable CMOS low-voltage linear transconductors; band-pass gm-C filter; biquad filter; constant low voltage supply; floating batteries; large input swing; post-layout simulation; programmable center frequency; programmable quality factor; tunable floating voltage sources; tunable output resistance; tunable transconductance; Bandwidth; Hafnium; Inverters; Low voltage; Nonlinear filters; Power supplies; Threshold voltage; Transconductance; Transconductors; Tuning;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.857391
