Amplifier with dark current compensation

Details Amplifier with dark current compensation Amplifier with dark current compensation

1978-08-14

1980-10-07

Mullins, James B.

Amplifiers

With d.c. reinsertion circuit

250214A, 330 85, 330110, H03F 2100

Patent

active

042271550

ABSTRACT:
A pre-amplifier for photomultiplier tubes includes means to compensate for the combined dark current and noise output of a photomultiplier tube without inducing a noise dependent offset voltage at the pre-amplifier output. A feedback amplifier and a compensating network, including a capacitor, cooperate to monitor the pre-amplifier output and during this time to maintain the feedback amplifier in a linearly responsive state while charging the capacitor to an amount necessary to clamp the average value of the most negative excursion of the pre-amplifier output to ground.

REFERENCES:
patent: 3772604 (1973-11-01), Hogg et al.

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