| CPC H03K 5/135 (2013.01) [H03K 2005/00019 (2013.01)] | 11 Claims |
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11. A delay method for outputting a delayed signal obtained by delaying an asynchronous input signal, the delay method comprising:
determining, in response to detection of a change in the asynchronous input signal at a detection timing synchronous with a clock signal, a synchronous delay timing later than the detection timing by a reference delay time according to the clock signal; and
changing the delayed signal at an asynchronous delay timing obtained by delaying the synchronous delay timing by an adjustment time obtained by subtracting a detection delay time from a change timing of the asynchronous input signal to the detection timing from a set time according to the clock signal.
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