A 3Volt high frequency and low input impedance CMOS current-mode precision full-wave rectifier

Khucharoensin, Surachet; Kasemsuwan, Varakorn

A 3Volt high frequency and low input impedance CMOS current-mode precision full-wave rectifier

Author(s)

Khucharoensin, Surachet

Kasemsuwan, Varakorn

Date Issued

December 1, 2002

Type

Conference Paper

Abstract

This paper presents a 3Volt high frequency and low input impedance CMOS current mode precision full-wave rectifier. The circuit is designed based on an improved Wilson current miller. All MOS transistors are biased at low current resulting in small power dissipation. Negative feedback has been employed to reduce the input impedance of the circuit(236Ω). HSPICE is used to perform the simulation and the result shows the frequency of operation as high as 100 MHz with a standard 0.5μm CMOS technology. The mismatch obtained from the input and rectifier's output is 0.21% for an input current of ±150μA. The DC transfer characteristic shows good linearity, very sharp corner at zero crossing point and good symmetry during positive and negative input cycle while power dissipation is 5.8μW. © 2002 IEEE.

Citation

IEEE International Conference on Semiconductor Electronics Proceedings ICSE, 239-242, 2002