Measuring apparatus with response adjustment

Details Measuring apparatus with response adjustment Measuring apparatus with response adjustment

1981-06-08

1983-06-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250578, 358213, H01J 4014

Patent

active

043885268

ABSTRACT:
The output (18) from an optical sensor is recharged for a time dictated by the output of the digital-to-analog converter (11). A previous count indicative of the recharge time is stored in memory (52) which controls the converter (11). This count is manipulated in incrementing circuit elements (54) (70 and 72) depending on the time the comparator (12) signals a difference signal, indicative of a period of recharge.

REFERENCES:
patent: 4136277 (1976-12-01), Gerrard
patent: 4172659 (1977-12-01), Laska

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