Offset removal using floating-gate circuits for mixed-signal systems

Author

Adil, Farhan ; Serrano, Guillenno ; Hasler, P.

Author_Institution

Dept. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

fYear

2003

fDate

23-25 Feb. 2003

Firstpage

190

Lastpage

195

Abstract

Floating-gate devices will be used in CMOS mixed-signal systems to eliminate the effects of device mismatch. Floating-gate transistors are programmed using a mixed-signal programming circuitry. This architecture allows programming of multitudes of floating gates automatically. Using floating-gate transistors, we will remove the input-referred offset voltage from differential pairs. Also, floating gates will be used in current mirrors to program out asymmetries in the output current. Combining the differential pair and current mirror, we create a fully balanced operational transconductance amplifier implemented using the mixed-signal programming architecture. Experimental results will show the performance of the balanced OTA.

Keywords

CMOS analogue integrated circuits; current mirrors; mixed analogue-digital integrated circuits; operational amplifiers; CMOS; asymmetries; current mirrors; device mismatch; differential pair; differential pairs; floating-gate circuits; fully balanced operational transconductance amplifier; input-referred offset voltage; mixed-signal programming architecture; mixed-signal systems; offset removal; output current; Circuits; Clocks; Differential amplifiers; Filters; Frequency; Mirrors; Operational amplifiers; Programming profession; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Mixed-Signal Design, 2003. Southwest Symposium on

Print_ISBN

0-7803-7778-8

Type

conf

DOI

10.1109/SSMSD.2003.1190425

Filename

1190425