Sense amplifier for high-density imaging array

Details Sense amplifier for high-density imaging array Sense amplifier for high-density imaging array

1996-07-11

1998-12-01

Mintel, William

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

257292, 257448, 257443, 330277, 330279, 330285, 330300, 330307, 365208, H01L 31062, H01L 31113

Patent

active

058442650

ABSTRACT:
A sense amplifier comprises an input node and an output node. An input transistor has a gate connected to the input node, a source connected to a first supply voltage rail, and a drain. A cascode transistor has a gate connected to a cascode node, a source connected to the drain of the input transistor, and a drain connected to the output node. A load transistor has a gate connected to a bias node, a drain connected to the output node, and a source connected to a second supply voltage rail. The gates of the cascode transistor and the load transistor are biased such that the input transistor and the cascode transistor are operated near their threshold and the load transistor is operated above threshold. In a presently preferred embodiment of the present invention, the input transistor and the cascode transistor of the sense amplifier are wide and short, such that they operate in below threshold, whereas the load transistor is made long and relatively narrow, so that it operates above threshold.

REFERENCES:
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patent: 5097305 (1992-03-01), Mead et al.
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patent: 5260592 (1993-11-01), Mead et al.
patent: 5297093 (1994-03-01), Coffman
patent: 5324958 (1994-06-01), Mead et al.
patent: 5325338 (1994-06-01), Runaldue et al.
patent: 5572474 (1996-11-01), Sheen et al.
patent: 5576560 (1996-11-01), Runaldue et al.
patent: 5638322 (1997-06-01), Lacey

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