Title :
A Micropower CMOS-Instrumentation Amplifier
Author :
Degrauwe, M. ; Vittoz, E. ; Verbauwhede, I.
fDate :
6/1/1985 12:00:00 AM
Abstract :
A CMOS switched capacitor instrumentation amplifier is presented. Offset is reduced by an auto-zero technique and effects due to charge injection are attenuated by a special amplifier configuration. The circuit which is realized in a 4-/spl mu/m double poly process has an offset (/spl tau/) of 370 /spl mu/V, an rms input referred integrated noise (0.5 -f/sub c//2) of 79 /spl mu/V, and consumes only 21 /spl mu/W (f/sub c/ = 8 kHz, V/sub DD/ = 3 V).
Keywords :
CMOS integrated circuits; Instrumentation amplifiers; Integrated circuit technology; Switched capacitor networks; Buffer storage; Capacitors; Circuits; Degradation; Differential amplifiers; Instruments; Intelligent sensors; Noise cancellation; Switches; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1985.1052386
