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A Precision Voltage-to-Frequency Converter Design

Authors
 Agrich Yu.V.
 Lifshits V.B.
Date of publication
 2010

Abstract
 Results of the precision integrating Voltage-to-Frequency Converter (VFC) design based on 0.35um CMOS process are presented. Some schematic solutions are suggested and integrated circuit of the VFC is designed based on analysis of factors, which define VFC conversion errors. Designed VFC provides to convert ±9V input voltage with absolute uncorrected error not more than 0.015%. VFC has 19.5-20 bit dynamic range at the output frequency range 0.1Hz-90kHz. Chopper stabilization of a integrator amplifier provides high VFC offset stability at the temperature and supply voltage ranges. Static adjustment of the integrator amplifier offset by on the board correction DAC allows to reduce conversion error at the output frequency higher than chopper frequency.
Keywords
 Voltage-to-Frequency Converter, VFC, integrator, operational amplifier, offset chopper stabilization.
Library reference
 Agrich Yu.V., Lifshits V.B. A Precision Voltage-to-Frequency Converter Design // Problems of Perspective Micro- and Nanoelectronic Systems Development - 2010. Proceedings / edited by A. Stempkovsky, Moscow, IPPM RAS, 2010. P. 521-526.
URL of paper
 http://www.mes-conference.ru/data/year2010/papers/m10-136-73193.pdf

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