Fast/slow state machine latch
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United States of America Patent
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Dec 2, 2008
Grant Date -
Jan 31, 2008
app pub date -
Oct 10, 2007
filing date -
Oct 28, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A fast/slow state machine latch is provided that generates fast and slow select signals for a single toggle, low power multiplexer circuit. In accordance with an embodiment of the present invention, the fast/slow state machine latch includes a first latch with a delayed output, a second latch with an undelayed output, an inverter for coupling the delayed output of the first latch to an input of the second latch, and an exclusive-OR (XOR) gate coupled to the delayed output of the first latch and a data input, an output of the XOR gate coupled to an input of the first latch. A method for incorporating low power multiplexer circuits into a circuit design with minimal input from a circuit designer is also provided.
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