Automatic gain control in photodetectors

Details Automatic gain control in photodetectors Automatic gain control in photodetectors

2007-05-22

2009-02-24

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

Reexamination Certificate

active

07495205

ABSTRACT:
The amount of gain applied to a photodetector such as a photomultiplier tube (PMT) is limited to an amount that does not cause the applied PMT bias voltage to overdrive, hence damage, the PMT. Techniques for limiting the PMT gain are implemented in a way that does not interfere with the precision with which the PMT gain may be established (by selection of a reference level) below that limited level.

REFERENCES:
patent: 3714441 (1973-01-01), Kreda
patent: 4436994 (1984-03-01), Van Vliet et al.
patent: 5726438 (1998-03-01), Marchand

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