| 摘要 |
<P>PROBLEM TO BE SOLVED: To switch a plurality of frequencies for control without increasing the number of parts or increasing electric power. <P>SOLUTION: An oscillation circuit 1 is connected with two crystal oscillators X1 and X2 to correspond to two frequencies, and is provided with an oscillation transistor Q that is an amplifier element and a capacitance part connected to the oscillation transistor Q. The capacitance part includes a varicap diode C12 that is a variable capacitance element for varying a capacitance, and switches the two crystal oscillators X1 and X2 to be oscillated for control, based on a capacitance of the varicap diode C12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
