Charge injection device opto-electronic sensor

Details Charge injection device opto-electronic sensor Charge injection device opto-electronic sensor

1976-06-16

1980-11-11

Munson, Gene M.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

357 24, 357 30, 250211J, H03K 342, H01L 2978, H01L 2714, H01L 3100

Patent

active

042335272

ABSTRACT:
An opto-electronic sensor has at least one light-permeable electrically insulating layer carried on a surface of a substrate of doped semiconductor material. The insulating layer carries a number of electrodes arranged in the form of a matrix of lines and columns in which at least one line is present with at least two electrodes. The electrodes belonging to a line are electrically interconnected with each other. A buried channel is present in the substrate below each column and is doped opposite to the doping of the substrate. Each buried channel is connected, by way of a respective on-off switch, to the input of a voltage amplifier whose input capacitance is smaller than the capacitance of each individual buried channel and whose input resistance is so great that the time constant determined by the input resistance and the capacitance of a buried channel is greater than 10 nsec. The input of the voltage amplifier is electrically connected to an external terminal contact by way of at least one additional on-off switch.

REFERENCES:
patent: 3676715 (1972-07-01), Brojdo
patent: 3781574 (1973-12-01), White
patent: 3805062 (1974-04-01), Michon et al.
patent: 3808476 (1974-04-01), McCann
patent: 3882531 (1975-05-01), Michon et al.
patent: 3934161 (1976-01-01), Caywood
patent: 3935446 (1976-01-01), Michon
patent: 3969636 (1976-07-01), Baertsch et al.
Graeme et al., Eds., Operational Amplifiers: Design and Applications, McGraw-Hill,1971, pp. 233-235.
Jespers et al., "A Three-Terminal Charge-Injection Device", IEEE Int. Solid-State Circuits Conf. (2/75), Dig. Tech. Papers, pp. 28-29.
Jespers et al., "Three-Terminal Charge-Injection Device", IEEE J. Solid-State Circuits, vol. SC-11 (2/76), pp. 133-139.

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