CMOS voltage-to-frequency converter with temperature drift compensation

M. R. Valero*, S. Celma, B. Calvo, N. Medrano

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

18 Citations (Scopus)

Abstract

This paper presents a new complementary metal-oxide-semiconductor (CMOS) differential voltage-to-frequency converter (VFC) suitable for sensor signal conditioning. Designed in a low-cost 0.18-μm CMOS process, the proposed VFC consumes less than 0.4 mW at a 1.8-V supply. For a differential input range of 0-1.2 V, output frequency varies from 0.1 to 1.1 MHz with a linearity error of less than 0.4%. A new temperature compensation technique keeps the gain error below 2.4% over the whole frequency span for a range of -20°C- +120°C.

Original languageEnglish
Article number5749695
Pages (from-to)3232-3234
Number of pages3
JournalIEEE Transactions on Instrumentation and Measurement
Volume60
Issue number9
DOIs
Publication statusPublished - Sep 2011

Keywords

  • Analog circuits
  • complementary metal-oxide-semiconductor (CMOS) analog integrated circuits
  • integrated circuits
  • signal processing
  • voltage-frequency conversion

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