Low-power highly linear output buffer

David Foley; Neal R. Butler; James A. Stobie

doi:10.1117/12.60507

1 July 1992 Low-power highly linear output buffer

David Foley, Neal R. Butler, James A. Stobie

Proceedings Volume 1684, Infrared Readout Electronics; (1992) https://doi.org/10.1117/12.60507
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

A class AB CMOS output buffer has been designed for use on an IR focal plane array. Given the requirements for power dissipation and load capacitance a class A output, such as a source follower, would be unsuitable. The approach taken uses a class AB amplifier configured as a charge integrator. Thus it converts a charge packet in the focal plane multiplexer to a voltage which is then the output of the focal plane. With a quiescent current of 18 micro-a and a load capacitance of 100 pf, the amplifier has an open loop unity gain bandwidth of 900 khz. Integral nonlinearity is better than .03 percent over 5.5 volts when run with VDD-VSS = 6v.

Citation Download Citation

David Foley, Neal R. Butler, and James A. Stobie "Low-power highly linear output buffer", Proc. SPIE 1684, Infrared Readout Electronics, (1 July 1992); https://doi.org/10.1117/12.60507

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