Digital post-distortion of an ADC analog front-end for gamma spectroscopy measurements
T. Kowalski, G. P. Gibiino, P. Barmuta, J. Szewinski, P. A. Traverso
Abstract:
This work presents the experimental characterization and digital post-distortion (i.e., digital linearization) of a MHz-range ADC analog front-end for gamma radiation spectroscopy measurements. The front-end was firstly characterized by means of a conventional approach yielding Total Harmonic Distortion (THD) and Effective Number Of Bits (ENOB). Then, it was tested using μs-range pulsed excitations, which are the typical waveforms encountered in gamma spectroscopy. After applying digital post-distortion, the linearized receiver shows a THD reduced by more than 20 dB, a substantial improvement in ENOB, and a higher accuracy in the acquisition of pulsed waveforms.
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IMEKO-TC4-2020-27.pdf
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