Title :
A low-voltage rail-to-rail CMOS V-I converter
Author :
Hung, Chung-Chih ; Ismail, Mohammed ; Halonen, Kari ; Porra, Veikko
Author_Institution :
Analog VLSI Lab., Ohio State Univ., Columbus, OH, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
This paper presents CMOS low-voltage rail to-rail voltage-to-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 rail to-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
Keywords :
CMOS analogue integrated circuits; VLSI; convertors; current-mode circuits; integrated circuit design; linearisation techniques; low-power electronics; 3 V; CMOS V-I converter; DC bias currents; LV rail-to-rail V-I converter; class-AB linearization technique; common-mode rail to-rail operation; constant transconductance value; current-mode analog VLSI circuits; low-voltage V-I converter; n-type converter cell; p-type converter cell; parallel connection; voltage-to-current converters; CMOS technology; Capacitance; Capacitors; Circuits; Feedback; Frequency; Operational amplifiers; Sampling methods; Switches; Very large scale integration;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
