| 摘要 |
PURPOSE:To reduce the time until an output level is confirmed after a FF for input extraction fetches an input signal by combining plural FFs with different threshold value and a majority decision circuit. CONSTITUTION:A majority decision circuit 10 uses an inverter 8 in the circuit 10 to invert an level signal (an output level of at least >= 2 FFs in FFs 1-3 made identical to each other) and the result is outputted externally from an output terminal 11. The majority decision circuit 10 is acted to output an H level signal forcibly from the output terminal 11 when the FF 3 is brought into the metastable state and the FFs 1, 2 are brought into H aud L level respectively. Thus, the time until the output level is confirmed after the input fetch FF fetches an input signal is decreased.
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