To provide a voltage control oscillator which can control the voltage control sensitivity and also improve its production yield by providing a voltage control sensitivity control capacitor or an inductor 2, in addition to an oscillation frequency control capacitor and an inductor.
In the circuit of this voltage control oscillator, a DC-cutting capacitor C2 is placed on a line 2 and between the hot terminal of a varicap diode D and the hot terminal of a resonator-forming main inductor L2 and also functions to control the voltage control sensitivity. Furthermore, a high-frequency choke inductor L1, an oscillation frequency control capacitor C3, capacitors C1 and C4, a transistor T, etc., are connected to the circuit of the voltage control oscillator. The voltage control sensitivity is controlled by trimming the function of the capacitor C2 on the line 2. Then the oscillation frequency is controlled, by trimming the capacitor C3 which is connected in series to the inductor L2.
KATSUMATA MASASHI
HATTORI YASUYUKI
NAGAI KENTA
FUKUMITSU YOSHIAKI
ISHIZUKA TAKEHIKO
