Digital gain adjuster circuit for photomultiplier tubes

Details Digital gain adjuster circuit for photomultiplier tubes Digital gain adjuster circuit for photomultiplier tubes

1983-02-22

1986-05-20

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214AG, 250366, H01J 4014

Patent

active

045903689

ABSTRACT:
A gain adjuster circuit is disclosed for adjusting the gain of a plurality of photomultiplier tubes (PMT's) by digital circuitry. The circuit includes a plurality of PMT's, each having a specific internal resistance. A plurality of switches and resistances are connected in series with the PMT's. The digital circuitry is designed for adjusting the effective resistances thereof, to adjust thereby the voltage across each of the several PMT's. Preferably, the digital circuitry includes a demultiplexer coupled, via the switches and resistances, to the PMT's, a flip-flop coupled to the demultiplexer, and a presettable counter coupled to the flip-flop.

REFERENCES:
patent: 3557373 (1971-01-01), Hess
patent: 3714441 (1973-01-01), Kreda
patent: 3988590 (1976-10-01), Johnson
W. W. Hardin, "Automatic Gain Control", IBM Technical Disclosure Bulletin, vol. 4, No. 12, May 1962, p. 84.
Brecke et al., "Automatic Gain Control for Photomultiplier Tubes", IBM Technical Disclosure Bulletin, vol. 17, No. 7, Dec. 1974; pp. 2077-2078.

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