Title :
CMOS Transconductors With Nearly Constant Input Ranges Over Wide Tuning Intervals
Author :
Bruschi, Paolo ; Sebastiano, Fabio ; Nizza, Nicolò
Author_Institution :
Dipt. di Ingegneria dell´´Informazione, Pisa Univ.
Abstract :
Three different bias strategies aimed to reduce the effect of tuning on either the differential input range or the common-mode range of triode-region CMOS transconductors are presented. The method is applied to an original transconductor topology that is optimized to produce ultralow Gm values. A prototype circuit, which was designed with the 0.35-mum bipolar-CMOS-DMOS (BCD6) process of STMicroelectronics, is presented. The effectiveness and limitations of the method are characterized by means of electrical simulations
Keywords :
CMOS integrated circuits; bipolar integrated circuits; circuit tuning; 0.35 micron; CMOS transconductors; bipolar-CMOS-DMOS process; common-mode range; differential input range; low-frequency filters; prototype circuit; tuning intervals; Chemical sensors; Circuit optimization; Circuit simulation; Low pass filters; MOSFETs; Mirrors; Optimization methods; Stability; Transconductors; Voltage; CMOS transconductor; constant input range; low-frequency filters;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.882126
