Radiant energy integrating meter

Details Radiant energy integrating meter Radiant energy integrating meter

1975-04-30

1976-12-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

356215, H01J 3912

Patent

active

039990613

ABSTRACT:
A radiant energy integrating meter having one or more parallel connected reversed biased radiant energy sensor cells connected to an integrating circuit having an integrating capacitor. A trigger circuit having a differential amplifier, connected to the integrating capacitor, which drives a further amplifier, is adapted to close a first switch such as a silicon controlled rectifier in response to a predetermined integrated sensor current. A counter circuit is coupled to the first switch and advances by one each time the first switch is closed. A second switch such as a relay is coupled to the first switch to provide a discharge path for the integrating capacitor. Finally, a delay circuit is coupled across the first switch to open the first switch after a predetermined time delay.

REFERENCES:
patent: 2798965 (1957-07-01), Goldfischer
patent: 3574443 (1971-04-01), Nanba
patent: 3727526 (1973-04-01), Hinds
patent: 3732491 (1973-05-01), Battista
patent: 3772517 (1973-11-01), Smith

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