NMOS digital imaging circuit

Details NMOS digital imaging circuit NMOS digital imaging circuit

1985-09-30

1987-04-07

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358212, 357 24, H04N 314

Patent

active

046563610

ABSTRACT:
A digital imaging circuit is disclosed utilizing an indirect charge sensing technique and also sense line capacitance neutralization circuitry. A plurality of sensing cells in conjunction with odd and even digital shift registers operate to propagate the detected light signals through the imaging circuit. Each sensing cell includes a photodetector which is used to bias a transistor off to full on. The higher the amount of light impinged on said photodetector the less current said transistors will conduct. A sense line detects this decrease on current flow which allows the voltage to rise on said sense line as increasing amounts of light impinged on said photodetector.

REFERENCES:
patent: 4112316 (1978-09-01), Wentz
patent: 4363035 (1982-12-01), Lehmann
patent: 4486778 (1984-12-01), Risch et al.
patent: 4587562 (1986-05-01), Imai et al.

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