Title :
A chopper and auto-zero offset-stabilized CMOS instrumentation amplifier
Author :
Witte, J.F. ; Huijsing, J.H. ; Makinwa, K.A.A.
Author_Institution :
Electronic Instrumentation Laboratory / DIMES, Delft University of Technology, Mekelweg 4, 2628CD, The Netherlands
Abstract :
This paper describes a CMOS instrumentation amplifier with a noise density of 42nV/νHz and 640kHz GBW at 325µA supply current. It achieves 2.5µV input offset voltage, 130dB CMRR, and 114dB PSRR by the combined use of chopping, auto-zeroing and a current-feedback topology.
Keywords :
Capacitors; Channel bank filters; Choppers; Clocks; Impedance; Instruments; Operational amplifiers; Topology; Transconductors; Voltage; auto-zero; chopping; dynamic offset compensation; instrumentation amplifier; low offset;
Conference_Titel :
VLSI Circuits, 2009 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
978-1-4244-3307-0
Electronic_ISBN :
978-4-86348-001-8
