3-transistor source follower-per-detector unit cell for 2-dimens

Details 3-transistor source follower-per-detector unit cell for 2-dimens 3-transistor source follower-per-detector unit cell for 2-dimens

1994-01-24

1995-04-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

348308, H01J 4014

Patent

active

RE0349089

ABSTRACT:
A Source-Follower-per-Detector (SFC) unit cell [12], a two dimensional array [30] of same and a method of operating the two dimensional array. Each unit cell is constructed with but three transistors [14, 16, 22] and is coupled to an associated radiation detector [10] for receiving an output signal therefrom. A method includes a first step of (a) reading out a first row (N) of unit cells by asserting a first row enable signal for causing each of the unit cells of the row (N) to impress an electrical signal onto an associated output signal line. The electrical signal has a magnitude that is a function of the associated detector output signal. The method includes an additional step of (b) simultaneously resetting another row of unit cells each of which has a reset input coupled to and responsive to the assertion of the first row enable signal line.

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F. Andoh et al., "A 250,000-Pixel Image Sensor with FET Amplification at Each Pixel for High-Speed Television Cameras", 1990 IEEE International Solid-State Circuits Conference Feb. 1990.

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