A VERY-LOW-LEVEL DC CURRENT-AMPLIFIER USING A PUSH-PULL PHOTO-COUPLERNEGATIVE FEEDBACK-CIRCUIT

Authors
NAKAMURA I HIGA H OCHIAI H
Citation
I. Nakamura et al., A VERY-LOW-LEVEL DC CURRENT-AMPLIFIER USING A PUSH-PULL PHOTO-COUPLERNEGATIVE FEEDBACK-CIRCUIT, Electronics & communications in Japan. Part 2, Electronics, 81(6), 1998, pp. 58-65
Citations number
15
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
Electronics & communications in Japan. Part 2, Electronics → ACNP
ISSN journal
8756663X
Volume
81
Issue
6
Year of publication
1998
Pages
58 - 65
Database
ISI
SICI code
8756-663X(1998)81:6<58:AVDCUA>2.0.ZU;2-I
Abstract
This paper describes a very-low-level de current amplifier using photo -coupler negative feedback circuits with a positive feedback circuit. A high-ohmage resistor is not used in the feedback circuit. This ampli fier shows very fast response speed (rise time t(r) = 15 mu s) and pro mises miniaturization of the circuit itself. Amplifiers using the sing le-type photo-coupler negative feedback circuits have several problems such as offset voltage and drift. This paper describes a method of ha ndling these problems by using push-pull-type photo-coupler negative f eedback circuits. (C) 1998 Scripta Technica, Electron Comm Jpn Pt 2, 8 1(6): 58-65, 1998.