19-06-2014 дата публикации
Номер: US20140167832A1
Described is an integrated circuit having a clock distribution network capable of transitioning from a non-resonant clock mode to a first resonant clock mode Transitions between clock modes or between various resonant clock frequencies are done gradually over a series of clock cycles. In example, when transitioning from a non-resonant clock mode to a first resonant clock mode, a strength of a clock sector driver is reduced over a series of clock cycles, and individual ones of a plurality of resonant switches associated with resonant circuits are modified in coordination with reducing the strength of the clock sector driver. 1. A method comprising: reducing a strength of a clock sector driver over a series of clock cycles, and', 'modifying, over the series of clock cycles, individual ones of a plurality of resonant switches associated with resonant circuits in coordination with said reducing the strength of the clock sector driver., 'transitioning from a non-resonant clock mode to a first resonant dock mode, wherein said transitioning includes2. The method of claim 1 , further comprising:detecting a stimulus to transition between the non-resonant clock mode and the first resonant clock mode, wherein said transitioning is responsive to said detecting.3. The method of claim 2 , wherein said stimulus is based upon change in clock rate beyond a threshold level.4. The method of claim 1 , wherein said plurality of resonant switches includes tunable resonant switches.5. The method of claim 1 , wherein each of the plurality of resonant switches is associated with a corresponding resonant circuit connected to a dock distribution circuit.6. The method of claim 1 , wherein said reducing the strength of the clock sector driver includes gradually changing the strength in stepwise or continuous degrees.7. The method of claim 1 , wherein said modifying individual ones of the plurality of resonant switches includes gradually enabling claim 1 , in stepwise or continuous quantities ...
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