| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact multiple oscillation circuit capable of suppressing the generation of abnormal oscillation. SOLUTION: The multiple oscillation circuit includes: a crystal oscillation circuit 11 with a crystal resonator Y1 and for oscillating at a prescribed frequency; a tuning circuit 13 tuned to a prescribed harmonic output included in an oscillation output of the crystal oscillation circuit 11; an amplification transistor Q2; and a resistor R4 connected between the collector and the base of the amplification transistor Q2 and including a self-bias function and a decoupling function. Moreover, the multiple oscillation circuit includes a tuning circuit 15 connected to the collector of the amplification transistor Q2 and tuned to a prescribed harmonic output outputted from the amplification transistor Q2; and a coupling capacitor C6 coupling the tuning circuits 13, and 15. COPYRIGHT: (C)2007,JPO&INPIT
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