Nonsaturated multivibrators for sensor signal conditioning

Author

Filanovsky, I.M.

Author_Institution

Alberta Univ., Edmonton, Alta., Canada

fYear

1989

fDate

14-16 Aug. 1989

Firstpage

1011

Abstract

Multivibrators based on operational transconductance amplifiers (OTA) are considered. The first is an astable bridge multivibrator with one OTA. This circuit is useful for two-wire bridge-to-frequency converters. The second circuit is an astable multivibrator with two OTAs. This circuit provides a linear dependence of the oscillation frequency on the sensor control current. Both circuits are nonsaturated multivibrators. Calculation of their oscillation frequency involves a linear model which describes the circuit behavior near the transition point from one quasistable state to another. The circuits with bipolar and MOS OTAs are treated.<>

Keywords

multivibrators; operational amplifiers; relaxation oscillators; signal processing equipment; switching circuits; variable-frequency oscillators; MOS OTAs; OTA; astable bridge multivibrator; astable multivibrator with two OTAs; astable multivibrators; bipolar OTAs; current controlled multivibrators; current controlled oscillators; current frequency conversion; linear model; nonsaturated multivibrators; on-chip frequency conversion; operational transconductance amplifiers; oscillation frequency; quasistable state; sensor signal conditioning; two-wire bridge-to-frequency converters; Bridge circuits; Digital modulation; Frequency conversion; Frequency modulation; Operational amplifiers; Resistors; Timing; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1989., Proceedings of the 32nd Midwest Symposium on

Conference_Location

Champaign, IL, USA

Type

conf

DOI

10.1109/MWSCAS.1989.102025

Filename

102025