| 摘要 |
<p>PURPOSE:To perform the processing with the retiming circuit by selecting a serial date signal or the output date on a holding means in response to a data extracting signal and outputting the selected signal or date to the holding means. CONSTITUTION:An inputted input data signal 101 is selected by a selection circuit 1 when a control signal 102 is set at an H level and sent to a holding circuit 2 as an output signal 104. The circuit 2 holds the signal 104 in the timing of the changing point of an inputted clock signal 103. Then the signal 104 held by the circuit 2 is outputted to a processing circuit of the next stage and to the circuit 1 as an output date signal 105. If the signal 102 is set at an L level, the output data signal 105 received from the circuit 2 is selected by the circuit 1. The signal 105 is sent to the circuit 2 as the signal 104. Therefore the signal 105 is never updated unless the signal 102 is set an H level. As a result, a necessary date signal is extracted.</p> |
