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This article introduces a novel version for implementing current-mode precision full-wave rectifier. The features of the proposed circuit are that: it can rectify and amplify current signal with controllable output magnitude via an input bias current: the output current is free from temperature variation. In addition, direction of the output current signal can be arbitrarily controlled by controlled current in the circuit to be either positive or negative without changing circuit topology, which differs from the previous literatures. Circuit description merely consists of 3 BiCMOS CCCDBAs, without any passive component. The performances of the proposed circuit are investigated through PSPICE. They show that the proposed circuit can function as a current-mode precision full-wave rectifier, where input current range from -240 muA to 240 muA can be achieved at plusmn1.5 V power supplies. The maximum power consumption is 11.8 mW. In addition, the highest frequency is restricted at up to megahertz range.
Date of Conference: Nov. 30 2008-Dec. 3 2008