Automatic measurement of frequency characteristics of operational amplifier circuits

Author

Abe, Kôki ; Wakatsuki, Yôji ; Naraoka, Masato

Author_Institution

Dept. of Comput. Sci. & Inf. Math., Univ. of Electro-commun., Tokyo, Japan

Volume

32

Issue

3

fYear

1989

Firstpage

367

Lastpage

370

Abstract

Laboratory experiments were developed for measuring the frequency characteristics of operational amplifier circuits using a personal computer with a data acquisition unit. A periodic rectangular wave, which is easily generated by a DA (digital/analog) converter, is applied to the circuit: then the steady-state response is digitized by an AD converter. Filon´s method was used for the numerical Fourier integration of the sampled response. The errors associated with the measurement of the frequency characteristics of an integrator were found to be less than 0.2 dB and 1 degrees in gain and phase, respectively, within the frequency range satisfying the condition that the gain be >or=0 dB.

Keywords

computerised instrumentation; frequency measurement; microcomputer applications; operational amplifiers; Fourier integration; data acquisition; frequency characteristics; frequency measurement; gain; integrator; operational amplifier circuits; personal computer; phase; rectangular wave; steady-state response; Analog-digital conversion; Circuits; Computer errors; Data acquisition; Frequency measurement; Gain measurement; Laboratories; Microcomputers; Operational amplifiers; Steady-state;

fLanguage

English

Journal_Title

Education, IEEE Transactions on

Publisher

ieee

ISSN

0018-9359

Type

jour

DOI

10.1109/13.34171

Filename

34171