Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1998-02-17
2000-08-15
Le, Que T.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250214R, 257223, H01L 2700
Patent
active
061040207
ABSTRACT:
Circuitry provides an electronic shutter capability to photo-receiving circuitry for the purpose of disabling integration of a photo-generating charge on an integration capacitor until a reading device reads the integrated signal from the integrating capacitor. With an input from a shutter control line of a high logic voltage, the shutter discontinues charging of the integrating capacitor until the integration capacitor is selectively connected to a read line. Upon receipt of a low logic voltage signal from the shutter control line, the shutter allows the integration capacitor to integrate a photo-receiving charge. The electronic shutter therefore provides well controlled integration time via shutter control. Another advantage is that the integration time is completely independent of the cell reading rate. Since integration time is independent of the cell reading rate, the shutter module allows for automatic gain control of photo-receiver charge integration when exposed to a wide range of light through shutter control.
REFERENCES:
patent: 4707124 (1987-11-01), Hickey et al.
patent: 4989094 (1991-01-01), Norita et al.
patent: 5149980 (1992-09-01), Ertel et al.
patent: 5498995 (1996-03-01), Szepesi et al.
patent: 5769384 (1998-06-01), Baumgartner et al.
patent: 5808677 (1998-09-01), Yonemoto
patent: 5932873 (1999-08-01), Bergemont et al.
Knee Derek L.
Misek Brian J.
Agilent Technologies
Le Que T.
Luu Thanh X.
LandOfFree
Electronic shutter for a low differential light level photo-rece does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic shutter for a low differential light level photo-rece, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic shutter for a low differential light level photo-rece will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2009263