Circuit arrangement to ascertain and indicate that a luminous de

Details Circuit arrangement to ascertain and indicate that a luminous de Circuit arrangement to ascertain and indicate that a luminous de

1985-07-23

1987-09-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214L, H01J 4014

Patent

active

046941550

ABSTRACT:
A circuit containing a photodiode for determining when there is sufficient illumination for an optical device to operate having provision for compensating signal variations due to temperature-dependent operation of the photodiode by supplying logarithmic means with an input from a potentiometer connected to a temperature-dependent distributor circuit.

REFERENCES:
patent: 3956757 (1976-05-01), Nomura et al.
patent: 3994595 (1976-11-01), Nobusawa
patent: 4040068 (1977-08-01), Nanba et al.
patent: 4247186 (1981-01-01), Uchidoi et al.

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