| 摘要 |
PROBLEM TO BE SOLVED: To provide a multiplying oscillator producing a reduced unnecessary spectrum component by particularly emphasizing a second harmonic wave component in the spectrum of a collector output waveform, and inputting into a tuning circuit with a higher level than a fundamental wave component included in the collector output waveform, namely, an oscillator frequency component. SOLUTION: An oscillator circuit 100 includes a resonance circuit 1 constituted of L1, C1, C2 and C4; a transistor Q1 having a base B common to the node between L1 and C1, and an emitter E common to the node between C1 and C2; bias resistors R1, R2 for supplying a proper operating point to the base of the transistor Q1; a resistor R5 disposed between the collector of the transistor Q1 and a power supply Vcc; a transistor Q2 having a collector connected common to both the emitter of the transistor Q1 and the node between C1 and C2; a resistor R17 connected between the emitter of the above transistor Q2 and GND; and bias resistors R3, R4 for supplying an operating point of the transistor Q2. Further, the collector of the transistor Q1 is connected to the base of the transistor Q2 via C3. COPYRIGHT: (C)2007,JPO&INPIT
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