Mixed-signal, 275 /spl deg/C instrumentation amplifier in bulk CMOS

Author

Yu, Xinyu ; Garverick, Steven L.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Case Western Reserve Univ., Cleveland, OH

fYear

2005

fDate

21-21 Sept. 2005

Firstpage

641

Lastpage

644

Abstract

A precision, mixed-signal amplifier uses correlated double sampling, a mixed-signal tracking loop, and constant-g_m biasing, and provides both analog and digital outputs. Its integrated g _m/C oscillator has a frequency stability of 8 ppm/degC from 25-200 degC. A fully differential opamp has a gain-bandwidth of ~30 MHz and open-loop gain that varies by just 1 dB from 25-200 degC. The overall instrumentation amplifier has selectable voltage gain up to 192 and stable performance to 275 degC

Keywords

CMOS integrated circuits; VHF amplifiers; frequency stability; instrumentation amplifiers; mixed analogue-digital integrated circuits; operational amplifiers; oscillators; signal sampling; 1 dB; 25 to 200 C; 275 C; analog outputs; bulk CMOS; correlated double sampling; digital outputs; frequency stability; fully differential opamp; gain bandwidth; instrumentation amplifier; integrated oscillator; mixed-signal amplifier; mixed-signal tracking loop; open-loop gain; Circuits; Clocks; Differential amplifiers; Frequency; Instruments; Oscillators; Parasitic capacitance; Temperature; Tracking loops; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2005. Proceedings of the IEEE 2005

Conference_Location

San Jose, CA

Print_ISBN

0-7803-9023-7

Type

conf

DOI

10.1109/CICC.2005.1568751

Filename

1568751