A high-performance analog electronic circuit for processing the signal from an absolute distance meter based on a frequency-modulated continuous-wave (FMCW) interferometer is presented. The front-end electronics includes a derivative block followed by a the time-variant baseline restoration of the photodetector current. A high signal-to-noise ratio is ensured by avoiding the use of a resistive transimpedance preamplifier and subsequent voltage processing. The paper details the electrical scheme of the preprocessing chain as well as the experimental results from an actual prototype of a distance meter
High-performance front-end electronics for frequency-modulated continuous-wave interferometrs / Rovati, Luigi; U., Minoni. - In: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. - ISSN 0018-9456. - STAMPA. - 48:(1999), pp. 1191-1196.
High-performance front-end electronics for frequency-modulated continuous-wave interferometrs
ROVATI, Luigi;
1999
Abstract
A high-performance analog electronic circuit for processing the signal from an absolute distance meter based on a frequency-modulated continuous-wave (FMCW) interferometer is presented. The front-end electronics includes a derivative block followed by a the time-variant baseline restoration of the photodetector current. A high signal-to-noise ratio is ensured by avoiding the use of a resistive transimpedance preamplifier and subsequent voltage processing. The paper details the electrical scheme of the preprocessing chain as well as the experimental results from an actual prototype of a distance meter
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