ANALYSIS OF A MULTIPLYING DAC EMPLOYED FOR SYNCHRONOUS DETECTION

Umberto Pogliano

Abstract

Multiplying digital to analog converters can be used as synchronous detection circuits by combining a proper code sequence and an analog input at the reference. The output for a periodic signal has been derived under reasonable assumptions. The analysis shows that this type of synchronous detector is sensible only to harmonic components almost equal to a multiple of the number of samples per period. This result can be seen as a generalization of the classical two-level synchronous detection theory.

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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