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low-power BiCMOS Op Amp with integrated current mode charge pump

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1 Author(s)
St.Pierre, R. ; Gain Technology Corporation, Tucson, AZ, USA

An operational amplifier with an integrated current mode charge pump is presented. This operational amplifier functions with a 4µA single-supply above-the-rail input and rail-to-rail output. Having an integrated charge pump greatly simplifies the amplifier design while providing an increased dynamic range over other rail-to-rail amplifiers. The current mode charge pump limits the power loss associated with feedthrough current found in most voltage mode designs. The resulting amplifier achieves a bandwidth of 54KHz, while consuming less than 10µW.

Published in:

Solid-State Circuits Conference, 1999. ESSCIRC '99. Proceedings of the 25th European

Date of Conference:

21-23 Sept. 1999

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