A CMOS Voltage to Current Converter for Low Voltage Applications

Authors:
Donald T. Comer;David J. Comer
Affiliations:
Department of Electrical and Computer Engineering, Brigham Young University, 459 Clyde Building, Provo, Utah 84602, Fax: (801) 378-6586 E-mail:;Senior Member, IEEE, Department of Electrical and Computer Engineering, Brigham Young University, 441 Clyde Building, Provo, Utah 84602, Tel: (801)378-4015 E-mail:
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2001

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Abstract

This correspondence introduces two circuit ideas which are applied to the design of a voltage to current converter circuit for application in analog CMOS circuits. The ideas are aimed at achieving an output current which is set by a precision reference voltage and achieving a high output impedance without the use of a cascode connection. The resulting circuit achieves a fast settling time and requires a minimum bias headroom voltage, making it suitable for use in low voltage battery-powered designs.