A five stage chopper stabilized instrumentation amplifier using feedforward compensation

Author

Thomsen, A. ; Kasha, D. ; Wai Lee

Author_Institution

Crystal Semicond. Div., Cirrus Logic Inc., Austin, TX, USA

fYear

1998

fDate

11-13 June 1998

Firstpage

220

Lastpage

223

Abstract

A programmable gain chopper stabilized instrumentation amplifier is presented. It uses a fifth order amplifier architecture with simulated open loop gain of 200 dB. It is the first reported silicon implementation of an amplifier using multipath feedforward compensation. The instrumentation amplifier achieves noise density of 7 nV/sqrt(Hz) and THD of -110 dB with 14 mW from a single 5 V supply. It is implemented in 0.6 /spl mu/m CMOS and has an active area of 4 mm/sup 2/.

Keywords

CMOS analogue integrated circuits; choppers (circuits); circuit stability; compensation; feedforward; gain control; instrumentation amplifiers; silicon; 0.6 micron; 14 mW; 200 dB; 5 V; CMOS IC; Si; Si implementation; chopper stabilized amplifier; fifth order amplifier architecture; five stage amplifier; instrumentation amplifier; multipath feedforward compensation; programmable gain; Bandwidth; Choppers; Circuit stability; Frequency; Instruments; Logic; Nonlinear distortion; Semiconductor device noise; Silicon; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits, 1998. Digest of Technical Papers. 1998 Symposium on

Conference_Location

Honolulu, HI, USA

Print_ISBN

0-7803-4766-8

Type

conf

DOI

10.1109/VLSIC.1998.688092

Filename

688092