JPH0635534Y2 - Oscillation circuit device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an oscillator circuit device in a high-frequency circuit device such as a TV device or a CATV converter device.

[Prior art]

As an oscillation circuit device in a conventional high frequency circuit device,
For example, there is a conventional configuration shown in the perspective view of the main part of FIG. 3 and the sectional view of the main part of FIG.

In the figure, 1 is an oscillating circuit device, 2 is a main inductor for oscillation thereof, 3 is an adjusting inductor for adjusting the operating range of the main inductor 2, and 4 is oscillation of the oscillating circuit device 1 which is detected and taken out to the next stage circuit. Next-stage detection inductor for
Is a circuit board, 6 is a voltage variable capacitance diode serially connected to the main inductor 2 on the opposite surface of the circuit board 5, and 7 is a case body.

Next, the operation will be described. FIG. 5 is an equivalent circuit thereof, in which the oscillation frequency in the oscillation circuit device 1 is derived by the main inductor 2 and the voltage variable capacitance diode 6 connected in series with the main inductor 2. The operating range of the main inductor 2 is adjusted by bringing the adjustment inductors 3 arranged in parallel in close proximity to the main inductor 2 to adjust the inductance of the oscillation circuit and oscillate at a predetermined frequency. Next, the predetermined oscillating frequency derived by the main inductor 2 is operated to be detected and taken out by the next-stage detecting inductor 4 which is taken out to the next mixing stage.

[Problems to be solved by the invention]

However, in the above-described oscillation circuit device 1 having the conventional configuration, the adjustment inductor 3 is required to adjust the operating range of the main inductor 2, which increases the number of parts in the oscillation circuit device 1 and increases the oscillation frequency in the oscillation circuit. There was a problem that there were many variations in the above.

The present invention was devised to solve the above problems.

[Means for Solving Problems and Their Actions]

The present invention for solving the above-mentioned problems is directed to an oscillator circuit inductor, a voltage variable capacitance diode which is conductively connected in series with one end of the oscillator circuit inductor, and a next stage detection device for detecting oscillation of the oscillator circuit inductor. Inductors are arranged on the same surface of the circuit board, and the oscillation inductor and the voltage varying diode are placed close to each other on the circuit board at positions such that the currents flowing through the inductors are in opposite directions. The configuration is such that the voltage variable capacitance diode is used as an inductor for adjusting the operating range of the oscillator circuit inductor.

〔Example〕

An embodiment of an oscillator circuit device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an essential part showing one embodiment, and FIG. 2 is a plan view of the essential part.

In the figure, 10 is an oscillation circuit device, 11 is a case body, 12 is a circuit board accommodated in the case body 11, 13 is a main inductor for oscillation erected on the circuit board 12, and 14 is a circuit board. Reference numeral 14a is a voltage variable capacitance diode which is erected on the upper surface of 12 in parallel with the main inductor 13 and one end of which is connected in series with the main inductor 13. Reference numeral 14a is a lead wire and 15 is an inductor for detecting the next stage.

Next, its operation is explained.
The high frequency signal guided to 13 is set to a predetermined oscillation frequency by the voltage variable capacitance diode 14 connected in series, and at this time, the high frequency signal of the voltage variable capacitance diode 14 is in the opposite direction to the high frequency signal flowing through the main inductor 13. The lead wire 14a of the voltage variable capacitance diode 14 is used to bring the lead wire 14a closer to the main inductor 13 so that the operating range of the main inductor 13 is adjusted. This is because the high frequency current of the voltage variable capacitance diode 14 is in the opposite direction to the main inductor 13, and the amount of reverse coupling can be adjusted by changing the approach of the voltage variable capacitance diode to change the inductance of the oscillation circuit device 10. Is.

Subsequently, the high-frequency signal derived at the predetermined frequency to the main inductor 13 is detected by the next-stage detection inductor 15 and is operated so as to be derived to the circuit of the next stage.

〔effect〕

Therefore, according to the oscillator circuit device of the present invention having the above-described configuration, the adjusting inductor for adjusting the operating range of the main inductor is provided upright on the same surface as the main inductor in the opposite direction in which the high-frequency signal flows. Since the voltage variable capacitance diode and its lead wire are used as the adjustment inductor, it is possible to simplify the circuit by omitting the components. In addition, the simplification reduces the variation elements, and the oscillation circuit The effect is that the device can be stabilized and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention, FIG. 2 is a plan view of an essential part, FIG. 3 is a perspective view showing a conventional example, and FIG. 4 is a sectional view of an essential part of the conventional example. , FIG. 5 shows an equivalent circuit diagram. 10 …… Oscillation circuit device, 11 …… Case body, 12 …… Circuit board, 13 …… Main inductor, 14 …… Voltage variable capacitance diode, 14a …… Lead wire, 15 …… Next stage detection inductor.

Claims (1)

[Scope of utility model registration request] 1. An oscillator circuit inductor, a voltage variable capacitance diode which is conductively connected in series to one end of the oscillator circuit inductor, and a next stage detection inductor for detecting oscillation of the oscillator circuit inductor. Oscillation characterized in that they are arranged on the same surface of the board, and are further erected close to each other on the circuit board at positions such that the currents flowing through the oscillation inductor and the voltage varying diode are in opposite directions. Circuit device.