| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a clock switching circuit with a simple and small-scale configuration for suppressing pulse-like noises caused when a clock signal is switched. <P>SOLUTION: The clock switching circuit is provided with: selection signal generation means (logic circuits 21, 22) for generating clock selection signals S21, S22 used to select one clock signal from a plurality of clock signals A, B on the basis of clock switching signals S11, S12 related to each of a plurality of the clock signals A, B; and a means for feeding back signals S31, S32 to the selection signal generation means (logic circuits 22, 21) corresponding to the clock switching signals S12, S11, the clock switching circuit synchronously outputting the generated clock selection signals S21, S22 corresponding to the clock signals A, B, and selecting and outputting a signal S41 or S42 on the basis of the signals S31, S32 synchronously outputted. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
