Title :
Highly linear, tunable, pseudo differential transconductor circuit for the design of Gm-C filters
Author :
Gharbiya, Ahmed ; Syrzycki, Marek
Author_Institution :
Sch. of Eng. Sci., Simon Fraser Univ., Burnaby, BC, Canada
Abstract :
This paper describes the circuit level implementation of a transconductor cell that is intended to be used in open loop configuration for the design of Gm-C filters in CMOS technology. The circuit uses a fixed transconductor cascaded with a variable gain stage. The fixed transconductor is highly linear for a wide input signal swing that is close to the rails. The variable gain stage is constructed using a current mode translinear circuit. The cell is tunable to enable compensation for process, temperature, and voltage variations and to enable the adjustment of the overall filter´s characteristics. The transconductor cell was designed in 0.35 μm TSMC CMOS technology and it is intended to operate from a 2 V supply. The physical design was carried out for several cells with different transconductance. The test chip has been fabricated and it is currently under testing.
Keywords :
CMOS analogue integrated circuits; circuit CAD; circuit tuning; continuous time filters; current-mode circuits; integrated circuit design; integrated circuit modelling; low-power electronics; 0.35 micron; 2 V; CMOS tunable pseudo-differential linear transconductor circuit; Gm-C filter applications; analog continuous time filters; cascaded variable gain stage; compensation tuning; current mode translinear circuit; filter characteristics adjustment; highly linear fixed transconductor cell; input signal swing; power supply rails; process variations; temperature variations; voltage variations; CMOS technology; Gain; Nonlinear filters; Rails; Temperature; Testing; Transconductance; Transconductors; Tunable circuits and devices; Voltage;
Conference_Titel :
Electrical and Computer Engineering, 2002. IEEE CCECE 2002. Canadian Conference on
Print_ISBN :
0-7803-7514-9
DOI :
10.1109/CCECE.2002.1015281
