Triangular/square-wave generator with independently controllable frequency and amplitude

Author

Chung, Won-Sup ; Kim, Hoon ; Cha, Hyeong-Woo ; Kim, Hee-Jun

Author_Institution

Dept. of Semicond. Eng., Chongju Univ., South Korea

Volume

54

Issue

1

fYear

2005

Firstpage

105

Lastpage

109

Abstract

A triangular/square-wave generator with current-controllable frequency and amplitude is presented. The generator utilizes operational transconductance amplifiers as switching elements. A prototype circuit built with commercially available components exhibits less than 2% nonlinearity in its current-to-frequency transfer characteristic from 1 to 10 kHz and -150 ppm/°C temperature coefficient of frequency over 15°C to 35°C. The circuit also displays wide sweep capability and good linearity of current to amplitude. The application of the circuit to a current-controllable saw-tooth waveform generator is also presented.

Keywords

operational amplifiers; square-wave generators; 1 to 10 kHz; 15 to 35 C; Schmitt trigger; amplitude control; frequency control; function generator; operational transconductance amplifiers; relaxation oscillator; saw-tooth wave generator; square wave generator; triangular wave generator; wide sweep capability; Capacitors; Frequency; Operational amplifiers; Resistors; Signal generators; Switches; Timing; Transconductance; Trigger circuits; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2004.840238

Filename

1381804