Photodetecting circuit with compensated integration signal

Details Photodetecting circuit with compensated integration signal Photodetecting circuit with compensated integration signal

1990-05-02

1991-07-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250221, G01V 904, H01J 4014

Patent

active

050361872

ABSTRACT:
The optical input detection apparatus is adapted to integrate the value of the light received corresponding to the sum of the value of the light received by the light receiving device during driving of the light emitting device and the external flood light, deduct from the integration value the value of the light received equivalent to the external flood light received by the photodetector during the non-driving period following the driving of the light emitting device, compensate the integration value to the signal corresponding to the light emitting output and output the compensated signal to the comparator for comparison. Consequently, the presence or absence of an interruption in the light beam may be detected without being affected by the external flood light.

REFERENCES:
patent: 3775560 (1973-11-01), Ebeling et al.
patent: 3860754 (1975-01-01), Johnson et al.
patent: 4061925 (1977-12-01), van der Gaag et al.
patent: 4243879 (1981-01-01), Carroll et al.
patent: 4366378 (1982-12-01), Simons
patent: 4645920 (1987-02-01), Carroll et al.
patent: 4681432 (1987-07-01), Kawabata et al.
patent: 4694182 (1987-09-01), Howard
patent: 4799044 (1989-01-01), Masters et al.
patent: 4851689 (1989-07-01), Hasegawa

Affiliated with

Also associated with

Rating

Photodetecting circuit with compensated integration signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photodetecting circuit with compensated integration signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photodetecting circuit with compensated integration signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1543444