| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To surely reduce unnecessary electromagnetic radiation by a simple configuration. <P>SOLUTION: A control part 20 generates specification signals C11-C52 for selecting frequencies different from previously-specified frequencies from a plurality of frequencies in a predetermined order to specify all of the plurality of frequencies in a single sequence. A signal generating part 10 is provided with current supply units U1-U5, and charges and discharges a certain amount of a current to a capacitance element 12 to generate a triangular wave TRI. A comparison circuit 13 compares the triangular wave TRI with an upper limit voltage ULMT and a lower limit voltage DLMT. Based on the comparison result, a clock signal generating circuit 14 generates a first clock signal CK1 and a second clock signal CK2. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
