Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Converting – per se – of an ac input to corresponding dc at an...
Patent
1998-01-20
1999-11-09
Lee, Thomas C.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Converting, per se, of an ac input to corresponding dc at an...
39575004, 39518306, 327270, 327291, 371 201, G06F 110
Patent
active
059830140
ABSTRACT:
A power management system pad clock and self-test circuit includes a clock processing circuit having a input configured to receive an oscillator clock signal having a first frequency. The clock processing circuit is configured to generate a first pad clock signal having a frequency approximately equal to one-half the first frequency and a second pad clock signal having a frequency that is equal to a programmable fraction of the first frequency. The circuit also includes a main pad clock output node. Multiplexer circuitry is coupled to the clock processing circuitry and the main pad clock output node and configured to receive a plurality of peripheral signals. The multiplexer circuitry is configured to operate in a standard mode of operation wherein one of the first pad clock signal and the second pad clock signal is routed to the main pad clock output node and a first test mode of operation wherein one of the plurality of peripheral signals is selectably routed to the main pad clock output node.
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Kim Harold J.
Lee Thomas C.
National Semiconductor Corp.
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