Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-08-07
2009-02-03
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S389000, C327S427000
Reexamination Certificate
active
07486127
ABSTRACT:
A circuit device having a transistor-based switch topology that substantially eliminates the possibility of latchup of the device. A series-connected low voltage threshold (LVT) N-channel transistor and a pull-up resistor are coupled across a switching (P-channel) transistor so that an integral body connection is provided for the switching transistor, which connects the body of the switching transistor to a node between the pull-up resistor and source terminal of the LVT transistor. The LVT transistor is connected with its gate and drain terminal connected to the output terminal of the switching transistor. The resistor is connected at its other end to the power supply side terminal of the switching transistor. The addition of these components in the particular configuration allows the body connection of the switching transistor to be automatically switched to the highest potential diffusion node.
REFERENCES:
patent: 3816767 (1974-06-01), Meri
patent: 5689209 (1997-11-01), Williams et al.
patent: 6628159 (2003-09-01), Voldman
Cranford Hayden C.
Garvin Stacy J.
Rasmus Todd M.
Cockburn Josh G.
Dillon & Yudell LLP
Donovan Lincoln
Hernandez William
International Business Machines - Corporation
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