A low-voltage rail-to-rail CMOS V-I converter

Chung-Chih Hung*, Mohammed Ismail, Kari Halonen, Veikko Porra

*Corresponding author for this work

Research output: Contribution to journalArticle

32 Scopus citations


This paper presents CMOS low-voltage rail-to-rail voltageto-current (V-I ) converters which could be used as basic building blocks to construct low-voltage current-mode analog very large scale integration (VLSI) circuits. In the circuit, an n-type V-I converter cell is connected in parallel with its p-type counterpart to achieve common-mode railto-rail operation. A linear differential relationship of the n-type V-I converter, or its p-type complement, is obtained using a new class-AB linearization technique. The constant transconductance value is obtained by manipulating the dc bias currents of n- and p-type V-I converter cells. The circuit can operate from rail to rail with a power supply of 3 V or less, depending on the VLSI technology and the dc bias current level.

Original languageEnglish
Pages (from-to)816-820
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
Issue number6
StatePublished - 1 Dec 1999

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