| 摘要 |
PROBLEM TO BE SOLVED: To suppress the fluctuation of oscillation frequency without extending the band of a receiving band pass filter nor using an external parts such as a coil, by adjusting the oscillation frequency by changing the length of a base stub wiring pattern of an oscillation transistor of a microwave oscillation circuit. SOLUTION: The resonance frequency control length 17b of a base stub of an oscillation circuit that is mounted on a printed board built into a remote control transmitting part is decided by shorting the parts set among continuous lands 22 after soldering a chip resistor 23 of 0Ωon the lands 22 following a base stub wiring pattern 21. In this method, the base stub length can be adjusted for adjusting of the resonance frequency by connecting the resistor 23 serving as a parts to a desired area in an extremely easy way by mounting it via an automatic machine. Thus, an oscillation device can be easily constructed with no increase of its size nor cost.
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