Title :
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
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;
Conference_Titel :
VLSI Circuits, 1998. Digest of Technical Papers. 1998 Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-4766-8
DOI :
10.1109/VLSIC.1998.688092
