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A Design of Full-wave Rectifier for Measurement Instrument  

Bae Sung-Hoon (Department of Computer Engineering, Seokyeong University)
Lim Shin-Il (Department of Computer Engineering, Seokyeong University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.43, no.4, 2006 , pp. 53-59 More about this Journal
Abstract
This paper describes the new design technique of full wave rectifier (FWR) for precise measurement instrument and the chip implementation of this FWR circuit with measurement results. Conventional circuits have some problems of complex design and limited output range( $VDD/2{\sim}VLIIV1IT+$). Proposed FWR circuit was simply designed with two 2x1 MUXs, one high speed comparator, and one differential difference amplifier(DDA). One rail-to-rail differential difference amplifier(DDA) performs the DC level shifting to VSS and 2X amplification simultaneously, and enables the full range ($Vss{\sim}VDD$) operation. The proposed FWR circuits shows more than 50% reduction of chip area and power consumption compared to conventional one. Proposed circuit was implemented with 0.35um 1-poly 2-metal CMOS process. Core size is $150um{\times}450um$ and power dissipation is 840uW with 3.3V single supply.
Keywords
Full wave rectifier(FWR); Level shifter; Differential difference amplifier(DDA);
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