An inexpensive gain stabilizer controlled by a time-shared computer☆

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Abstract

An electronic pulse amplifier is described for automatic gain correction in high-resolution high-rate pulse-height analysis systems. The circuit gain is controlled by a PDP-7 computer devoting less than 4 ms per second of its time to provide gain correction signals for up to 8 ampliers. Necessary control voltages are developed in the computer's CRT display circuits and transferred to a “sample and hold” circuit associated with each gain stabilizer. Gain control is accomplished by adjusting the gate voltage of an FET which shunts a small fraction of the total signal.

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Cited by (4)

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  • On a digitally stabilized timing system

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  • Review of sub-nanosecond time-interval measurements

    1973, IEEE Transactions on Nuclear Science
☆

This work was carried out as part of the research program of the Nuclear Chemistry Division of the Lawrence Radiation Laboratory, University of California, which is supported by U.S. Atomic Energy Commission Contract W-7405-eng-48.

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