DEGRADATION MECHANISMS IN OPERATIONAL-AMPLIFIER PRECISION RECTIFIERS

Authors
HAYATLEH K LIDGEY FJ PORTA S
Citation
K. Hayatleh et al., DEGRADATION MECHANISMS IN OPERATIONAL-AMPLIFIER PRECISION RECTIFIERS, IEEE transactions on circuits and systems. 1, Fundamental theory andapplications, 42(8), 1995, pp. 479-485
Citations number
2
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
IEEE transactions on circuits and systems. 1, Fundamental theory andapplications → ACNP
ISSN journal
10577122
Volume
42
Issue
8
Year of publication
1995
Pages
479 - 485
Database
ISI
SICI code
1057-7122(1995)42:8<479:DMIOPR>2.0.ZU;2-W
Abstract
Two principal degradation mechanisms that are generally present in op- amp precision rectifiers have been studied in detail. The process of r ectification increases the spectral content, and subsequent band-limit ed signal processing causes a ''loss in depth'' at the zero-crossings. The second source of degradation is caused by diode feedback nonlinea rity effects that cause the op-amp to become open-loop, and this resul ts in a missing segment in the final output. Total harmonic distortion is an inadequate figure of merit to quantify these two effects, and s o an alternative is presented.