THE PRINCIPLE OF NEW SIGMA DELTA MODULATION TECHNIQUE BASED UPON THE USE OF A FLIP-FLOP

Martin Kollár, Ján Šaliga

Abstract

This paper describes a new sigma delta modulation technique. This technique is used for measurement of changes in half capacitive bridge to detect deflections, which can result from acceleration input in practice. The half bridge is connected to a modified flip-flop circuit, the outputs of which are used for one-bit force feedback. The modification of flip-flop consists in the implementation of a switched capacitor structure to achieve a perfect flip-flop value symmetry and compensation of a flicker noise. Some theoretical considerations are verified by experimental results. An experimental circuit has been constructed from discrete elements.

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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