| 摘要 |
<p>PURPOSE:To provide a clock generation circuit capable of generating a reference clock without requiring an out-fitting component for an LSI and an external reference signal source, and reducing an LSI cost and a system cost. CONSTITUTION:This circuit is equipped with first and second capacitors C1, C2 with the same capacitance value, a constant current source circuit 10, a first switching circuit SW1 which connects the first capacitor to the constant current source circuit or reference potential selectively by a first switching control signal, a second switching circuit SW2 which connects the second capacitor to the constant current source circuit or the reference potential selectively by a second switching control signal, and a control circuit 16 which connects the first and second capacitors to the constant current source circuit alternately and controls the first and second switching circuits SW1, SW2 at every arrival of the charge voltage of the first or second capacitor at a prescribed voltage.</p> |
