Title :
A Micropower CMOS-Instrumentation Amplifier
Author :
Degrauwe, M. ; Vittoz, E. ; Verbauwhede, I.
Author_Institution :
Centre Suisse d´´Electronique et de Microtechnique CSEM (formerly CEH), Maladiÿre 71, 2000 Neuchâtel 7, Switzerland.
Abstract :
A CMOS switched capacitor instrumentation amplifier is presented. Offset is reduced by an auto-correlation technique and effects due to charge injection are attenuated by a special amplifier configuration. The circuit which is realized in a 4 ¿m double poly process has a typical offset (¿) of 370 ¿V, an RMS input referred integrated noise (0-fc/2) of 79 ¿V and consumes only 21 ¿W (fc = 8 kHz, VDD = 3 V).
Keywords :
Autocorrelation; Capacitors; Circuits; Differential amplifiers; Instruments; Noise reduction; Signal processing; Switches; Transconductance; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 1984. ESSCIRC '84. Tenth European
Conference_Location :
Edinburgh, UK
