Degradation mechanisms in operational amplifier precision rectifiers

Author

Hayatleh, K. ; Lidgey, F.J. ; Porta, S.

Author_Institution

Sch. of Eng., Oxford Brookes Univ., UK

Volume

42

Issue

8

fYear

1995

fDate

8/1/1995 12:00:00 AM

Firstpage

479

Lastpage

485

Abstract

Two principal degradation mechanisms that are generally present in op-amp precision rectifiers have been studied in detail. The process of rectification increases the spectral content, and subsequent band-limited signal processing causes a “loss in depth” at the zero-crossings. The second source of degradation is caused by diode feedback nonlinearity effects that cause the op-amp to become open loop, and this results in a missing segment in the final output. Total harmonic distortion is an inadequate figure of merit to quantify these two effects, and so an alternative is presented

Keywords

circuit feedback; electric distortion; operational amplifiers; rectifying circuits; band-limited signal processing; degradation mechanisms; diode feedback nonlinearity effects; open loop; operational amplifier precision rectifiers; spectral content; zero-crossings; Circuits; Degradation; Diodes; Frequency; Negative feedback; Operational amplifiers; Output feedback; Rectifiers; Signal processing; Total harmonic distortion;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.404061

Filename

404061