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A five stage chopper stabilized instrumentation amplifier using feedforward compensation

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3 Author(s)
Thomsen, A. ; Crystal Semicond. Div., Cirrus Logic Inc., Austin, TX, USA ; Kasha, D. ; Wai Lee

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/.

Published in:

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

Date of Conference:

11-13 June 1998