Title :
Towards an ideal data acquisition channel
Author :
Pintelon, Rik ; Rolain, Yves ; Bossche, Marc ; Schoukens, J.
Author_Institution :
Vrije Univ., Brussels, Belgium
fDate :
2/1/1990 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
