Towards an ideal data acquisition channel

Author

Pintelon, Rik ; Rolain, Yves ; Bossche, Marc ; Schoukens, J.

Author_Institution

Vrije Univ., Brussels, Belgium

Volume

39

Issue

1

fYear

1990

fDate

2/1/1990 12:00:00 AM

Firstpage

116

Lastpage

120

Abstract

A method is presented for compensating in real time for a nonideal transfer function of a data acquisition channel by means of a digital IIR (infinite impulse response) filter. Real-time compensation of the amplitude and phase characteristics of an acquisition channel so that the long-term error is less than ±0.01 dB and ±0.1°, respectively, has been obtained experimentally. It is shown that stability and linearity are the main requirements for the components of the data acquisition channel. Careful selection of the components and outlining of the antialias filter and the programmable amplifier is no longer necessary

Keywords

compensation; computerised instrumentation; data acquisition; digital filters; stability; FFT; IIR; amplitude characteristics; computerised instrumentation; data acquisition channel; digital filter; infinite impulse response; linearity; long-term error; nonideal transfer function; phase characteristics; real time compensation; stability; Calibration; Data acquisition; Digital filters; Equalizers; Frequency; IIR filters; Passband; Signal processing algorithms; Time domain analysis; Transfer functions;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.50428

Filename

50428