Diode Zener feedback preamplifier for zero-crossover optical encoders

Author

Rovati, Luigi ; Salvatori, Giorgia

Author_Institution

Dept. of Inf. Eng., Univ. of Modena & Reggio Emilia, Italy

Volume

3

fYear

2004

fDate

18-20 May 2004

Firstpage

2361

Abstract

A novel preamplifier system to improve the performance of zero-crossover optical encoders is presented. The network is based on a low-noise operational amplifier with a Zener diode feedback. We propose to exploit the non-linear characteristic of this network to reduce the angular measurement uncertainty. The circuit has been accordingly developed and tested in operation.

Keywords

Zener diodes; angular measurement; feedback amplifiers; measurement uncertainty; operational amplifiers; photodetectors; preamplifiers; angular measurement uncertainty; diode Zener feedback preamplifier; fine circular grating scanning; four-quadrant photodiode photodetector; incremental encoder; low-noise operational amplifier; nonlinear characteristic; precision optical encoders; zero-crossing detection scheme; zero-crossover optical encoders; Circuit testing; Diodes; Low-noise amplifiers; Measurement uncertainty; Nonlinear optics; Operational amplifiers; Optical amplifiers; Optical feedback; Preamplifiers; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE

ISSN

1091-5281

Print_ISBN

0-7803-8248-X

Type

conf

DOI

10.1109/IMTC.2004.1351568

Filename

1351568