| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a clock generating circuit that is capable of generating a clock signal with small clock noise using a small-scale circuit. <P>SOLUTION: A clock generating circuit includes a first current generating circuit, a first voltage generating circuit, a first comparison circuit, a second current generating circuit, a second voltage generating circuit, a second comparison circuit, a clock output circuit, and a control circuit. The clock output circuit generates a clock signal whose phase changes in synchronization with timings at which first and second comparison results change. The control circuit generates a random number in synchronization with the clock signal and variably controls at least one of a first current, a second current, a first threshold value, and a second threshold voltage in accordance with the random number. <P>COPYRIGHT: (C)2012,JPO&INPIT |
