Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Integrated structure
Patent
1996-02-21
1998-07-07
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Integrated structure
327566, 327546, 327433, 327108, 257370, H01L 2702, H01L 2778
Patent
active
057775109
ABSTRACT:
A pull-up output driver circuit includes a field effect transistor (FET) fabricated in a well region having a first conductivity type. The well region, in turn, is surrounded by a semiconductor region having a second conductivity type. The FET has a source connected to an output pad and a drain connected to a V.sub.CC voltage supply rail. The gate of the FET and the well region are connected to a driving circuit, and the semiconductor region is connected to the V.sub.CC voltage supply rail. A lateral bipolar transistor is formed by the drain, the source and the well region, and a vertical parasitic bipolar transistor is formed by the source, the semiconductor region and the well region. The driving circuit provides a signal (or signals) to the gate and well region to control the pull-up driver circuit. The FET turns on at a relatively low threshold voltage because the lateral bipolar transistor and the FET are turned on at substantially the same time.
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Callahan Timothy P.
Integrated Device Technology Inc.
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