An Ultra-Low-Drift Amplifier for Use with Photomultipliers

Details An Ultra-Low-Drift Amplifier for Use with Photomultipliers An Ultra-Low-Drift Amplifier for Use with Photomultipliers

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95...86d&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.95, p.86.

Computer Science

Performance

Scientific paper

Details are given on the design and performance of an extremely stable dc amplifier for use with photomultipliers in astronomical applications. Zero-level drift, a slight problem with most inexpensive high-gain dc amplifiers, is avoided with a new low-cost integrated circuit op-amp employing chopper stabilization. The output is read with a voltage-to-frequency converter with a nonlinearity of 0.03%, permitting larger than usual gain steps. Three gain steps cover the usual photocurrent range. Construction cost is approximately $50.

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