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Towards an ideal data acquisition channel

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4 Author(s)
R. Pintelon ; Vrije Univ., Brussels, Belgium ; Y. Rolain ; M. V. Bossche ; J. Schoukens

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

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IEEE Transactions on Instrumentation and Measurement  (Volume:39 ,  Issue: 1 )