COMMON-MODE REJECTION RATIO IN CURRENT-MODE INSTRUMENTATION AMPLIFIERS

Authors
SU WJ LIDGEY FJ
Citation
Wj. Su et Fj. Lidgey, COMMON-MODE REJECTION RATIO IN CURRENT-MODE INSTRUMENTATION AMPLIFIERS, Analog integrated circuits and signal processing, 7(3), 1995, pp. 257-260
Citations number
5
Categorie Soggetti
Computer Sciences","Engineering, Eletrical & Electronic","Computer Science Hardware & Architecture
Journal title
Analog integrated circuits and signal processing → ACNP
ISSN journal
09251030
Volume
7
Issue
3
Year of publication
1995
Pages
257 - 260
Database
ISI
SICI code
0925-1030(1995)7:3<257:CRRICI>2.0.ZU;2-L
Abstract
The current-mode instrumentation amplifier (CMIA) based on op-amp powe r-supply current sensing offers distinct advantages over conventional architecture designs. The CMIA is studied in detail and the CMRR expre ssion is derived in terms of op-amp and transistor parameters. A good CMRR is shown to depend upon several factors, including the power-supp ly rejection ratio of the op-amps used in the CMIA. The results obtain ed are shown to compare well with SPICE simulation and provide valuabl e design insight for development of the next generation of CMIAs.