Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2004-12-17
2008-11-18
Zweizig, Jeffrey S (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
Reexamination Certificate
active
07453311
ABSTRACT:
A method and apparatus compensate for process variations in the fabrication of semiconductor devices. A semiconductor device includes a control circuit that measures a performance parameter of the device, and in response thereto selectively biases one or more well regions of the device to compensate for process variations. For some embodiments, if measurement of the performance parameter indicates that the device does not fall within a specified range of operating parameters, the control circuit biases selected well regions to sufficiently alter the operating characteristics of transistors formed therein so that the device falls within the specified range of operating parameters.
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de Jong Jan L.
Hart Michael L.
Quinn Patrick
Paradice III William L.
Tong Kin-Wah
Xilinx , Inc.
Zweizig Jeffrey S
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