Electronic postage meter radiant energy device circuit

Details Electronic postage meter radiant energy device circuit Electronic postage meter radiant energy device circuit

1979-12-26

1982-01-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214A, H01J 4014

Patent

active

043107559

ABSTRACT:
A radiant energy system includes an energy receiving member for receiving energy and for converting received energy into electrical signals. Current amplifying means are coupled to the radiant energy receiving member. Voltage comparator means are coupled to the current amplifying means to compare the voltage developed by the current amplifying means to a reference voltage. The comparator provides an output signal indicative of whether the voltage applied to the comparator input is sufficient to actuate the circuit. The output characteristics of the comparator can be selected to be consistent with TTL and data processing circuit drive requirements. The system is suitable for use wherein the radiant energy devices are employed as position indicators for moveable parts and or electrical isolation of postage meters.

REFERENCES:
patent: 3622801 (1971-11-01), Stone
patent: 3772514 (1973-11-01), Sunderland
patent: 3813540 (1974-05-01), Albrecht
patent: 3814944 (1974-06-01), Berger
patent: 3886351 (1975-05-01), Williams

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