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A 0.8V, 7μA, rail-to-rail input/output, constant Gm operational amplifier in standard digital 0.18μm CMOS

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5 Author(s)
Citakovic, J. ; Orsted-DTU, Tech. Univ. of Denmark, Lyngby, Denmark ; Riis Nielsen, I. ; Hammel Nielsen, J. ; Asbeck, P.
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A two-stage amplifier, operational at 0.8V and drawing 7μA, has been integrated in a standard digital 0.18μm CMOS process. Rail-to-rail operations at the input are enabled by complementary transistor pairs with gm control. The efficient rail-to-rail output stage is biased in class AB. The measured DC gain of the amplifier is 75dB, and the unity-gain frequency is 870kHz with a 12pF, 100kΩload. Both input and output stage transistors are biased in weak inversion.

Published in:

NORCHIP Conference, 2005. 23rd

Date of Conference:

21-22 Nov. 2005