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    초록·키워드

    This paper describes the new design technique of full wave rectifier (FWR) for precise measurement instrument. Conventional circuits have some problems of complex design and limited output range. Proposed FWR circuit was simply designed with two 2:1 MUXs, one high speed comparator and one differential difference amplifier (DDA). Differential difference amplifier (DDA) performs the DC level shifting from the half of supply voltage (VDD/2) to ground and also 2X amplification simultaneously. The DDA was optimized to have rail to rail operation. The proposed FWR circuits shows less hardware component and less power consumption than conventional one. Proposed circuit was implemented with 0.35um 1-poly 2-metal CMOS process. Core size is 150um x 450um and power dissipation is 840uW with 3.3V single supply.

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      UCI(KEPA) : I410-ECN-0101-2013-569-001044621