VOLTAGE TO FREQUENCY CONVERTER AND FRACTIONAL FREQUENCY DIVIDER BASED ON MODIFIED SIGMA-DELTA CONVERTER

Milan Stork

Abstract

Voltage to frequency converter (VFC) is an oscillator whose frequency is linearly proportional to control voltage. In this paper, the New Synchronous Voltage to Frequency Converter (NSVFC) or "sigma delta" (Σ-Δ) voltage to frequency converter is described. This NSVFC works similarly as conventional synchronous voltage to frequency converter (SVFC), but it has a better frequency spectral property then other SVFC and therefore it is possible to used as fractional frequency divider and also building block in fractional phase locked loop (PLL). An experimental NSVFC was constructed and simulated to verify operation of the converter. Analysis and prototype of NSVFC is described.

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DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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