Self-scanning photo-sensitive circuits

Details Self-scanning photo-sensitive circuits Self-scanning photo-sensitive circuits

1976-11-15

1978-08-22

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

250208, 307304, 307311, H04N 312, H01J 3912, H03K 3353

Patent

active

041092848

ABSTRACT:
High density self-scanning photo-sensitive circuits employ a voltage transfer mode with charge amplification. The circuits include a field effect transistor and a capacitor coupled from the gate electrode of the transistor through a diode to the source electrode of the transistor. A photo-diode is connected to the gate electrode of the transistor. Means are provided for precharging the capacitor to substantially the threshold voltage of the transistor while applying an additional constant voltage of predetermined magnitude to the gate electrode to operate the transistor in its linear region. An analog signal from the photo-diode is also applied to the gate electrode of the transistor which is amplified by the transistor with little or no threshold voltage loss. In a preferred array of these circuits, the photo-diodes or light sensitive devices are arranged linearly, in quantities of a thousand or more, and video signals from alternate devices are coupled to one of two common busses through individual gating transistors.

REFERENCES:
patent: 3814846 (1974-06-01), Snow

Affiliated with

Also associated with

Rating

Self-scanning photo-sensitive circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-scanning photo-sensitive circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-scanning photo-sensitive circuits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1562513