Spannungsgesteuerter Oszillator und elektronisches Gerät dafür

摘要

Provided is a voltage-controlled oscillator whose frequency of oscillation can be varied using a substrate on which the same circuit pattern as that of the voltage-controlled oscillator is printed. In a resonant circuit included in the voltage-controlled oscillator, a first land is formed parallel to an inductor. A second land is formed parallel to the inductor and to a variable-capacitance diode. The capacitances of capacitors attached to the first land and second land are changed in order to vary the frequency of oscillation of the voltage-controlled oscillator. The frequency of oscillation can be varied without the necessity of scraping the inductor through which a major signal passes. Therefore, an electric characteristic of the voltage-controlled oscillator will hardly be degraded or the frequency of oscillation thereof will hardly be unsteadied. The frequency of oscillation can be varied merely by changing the capacitances of the capacitors attached to the first and second lands. Consequently, a step of scraping a strip line can be excluded, and laboring efficiency can be improved.