Solid-state imaging device having a clamping circuit for drawing

Details Solid-state imaging device having a clamping circuit for drawing Solid-state imaging device having a clamping circuit for drawing

1979-08-16

1981-05-12

Munson, Gene M.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307221D, 357 24, 357 30, H03K 342, H01L 2978, H01L 2714, H01L 3100

Patent

active

042674697

ABSTRACT:
In a solid-state imaging device having on an identical semiconductor substrate a plurality of photodiodes which are arrayed in two dimensions, vertical and horizontal switching MOSFETs which select the positions of the photodiodes, and vertical and horizontal scanning circuits which provide scanning pulses for controlling the operations of the vertical and horizontal switching MOSFETs; the improvement therein comprising a clamping circuit which is made up of a diode, a MOSFET or the like and which is disposed between the photodiode and a vertical scanning line of the succeeding stage, so that excess charges overflowing the photodiode are drawn out from the vertical scanning line through the clamping circuit, whereby the blooming can be prevented.

REFERENCES:
patent: 3715485 (1973-02-01), Weimer
patent: 4155094 (1979-05-01), Ohba et al.

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