CN203352538U - Voltage-controlled oscillator circuit - Google Patents
Voltage-controlled oscillator circuit Download PDFInfo
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- CN203352538U CN203352538U CN 201320313951 CN201320313951U CN203352538U CN 203352538 U CN203352538 U CN 203352538U CN 201320313951 CN201320313951 CN 201320313951 CN 201320313951 U CN201320313951 U CN 201320313951U CN 203352538 U CN203352538 U CN 203352538U
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Abstract
The utility model discloses a voltage-controlled oscillator circuit. The circuit comprises a triode VT1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first potentiometer RW1, a second potentiometer RW2, an oscillation inductor L1 and a varactor D1. The circuit is advantaged by having easily adjustable oscillation frequency and good high-frequency performance. The circuit is also advantaged by being simple in circuit structure, stable in oscillation frequency, and broad in frequency coverage. The circuit can be used for a local oscillator circuit of a superheterodyne receiver or used for forming a phase-lock loop with a phase comparator and a loop filter.
Description
Technical field
The utility model relates to a kind of pierce circuit, is specifically related to a kind of voltage-controlled oscillator circuit.
Background technology
Voltage controlled oscillator (VCO, Voltage Controlled Oscillator) is the significant element in wireless communication system, for the transmitter and receiver of communication system provides local oscillation signal, or forms phase-locked loop with phase comparator and loop filter.Because the capacitance connecting three point type oscillator high frequency characteristics is good, therefore, most of VCO are capacitance connecting three point type oscillator.
Summary of the invention
The utility model, for the deficiencies in the prior art, has proposed a kind of voltage-controlled oscillator circuit.
A kind of voltage-controlled oscillator circuit comprises triode VT1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the first potentiometer RW1, the second potentiometer RW2, vibration inductance L 1 and variable capacitance diode D1;
One end of described triode VT1 base stage and the first resistance R 1, the stiff end of the first potentiometer RW1, one end of the first capacitor C 1 connects, one end of the other end of the first resistance R 1 and the second resistance R 2, the stiff end of the second potentiometer RW2 connects and meets power supply+VCC, one end of the other end of the second resistance R 2 and the second capacitor C 2, the collector electrode of triode VT1 connects, one end of the emitter of triode VT1 and the 3rd resistance R 3, one end of the 3rd capacitor C 3, one end of the 4th capacitor C 4 connects, the other end of the other end of the second capacitor C 2 and the 3rd capacitor C 3, one end of vibration inductance L 1, one end of the 4th resistance R 4 connects and as output, the other end of vibration inductance L 1 and the other end of the 4th resistance R 4, one end of the 6th capacitor C 6 connects, one end of the other end of the 6th capacitor C 6 and the 5th capacitor C 5, the negative electrode of variable capacitance diode D1, one end of the 5th resistance R 5, one end of the 6th resistance R 6 connects, the other end of the 5th resistance R 5 is connected with the movable end of the second potentiometer RW2, the movable end of the other end of the first capacitor C 1 and the first potentiometer RW1, the other end of the 3rd resistance R 3, the other end of the 4th capacitor C 4, the other end of the 5th capacitor C 5, the anode of variable capacitance diode D1, the other end of the 6th resistance R 6 connects and ground connection.
The beneficial effects of the utility model: the utlity model has frequency of oscillation and be easy to regulate, the advantage that high frequency characteristics is good.Have advantages of that circuit is simple simultaneously, frequency of oscillation is stable, frequency coverage is wide, can be for the local oscillation circuit of superheterodyne receiver, or form phase-locked loop with phase comparator and loop filter.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of voltage-controlled oscillator circuit comprises triode VT1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the first potentiometer RW1, the second potentiometer RW2, vibration inductance L 1 and variable capacitance diode D1;
One end of described triode VT1 base stage and the first resistance R 1, the stiff end of the first potentiometer RW1, one end of the first capacitor C 1 connects, one end of the other end of the first resistance R 1 and the second resistance R 2, the stiff end of the second potentiometer RW2 connects and meets power supply+VCC, one end of the other end of the second resistance R 2 and the second capacitor C 2, the collector electrode of triode VT1 connects, one end of the emitter of triode VT1 and the 3rd resistance R 3, one end of the 3rd capacitor C 3, one end of the 4th capacitor C 4 connects, the other end of the other end of the second capacitor C 2 and the 3rd capacitor C 3, one end of vibration inductance L 1, one end of the 4th resistance R 4 connects and as output, the other end of vibration inductance L 1 and the other end of the 4th resistance R 4, one end of the 6th capacitor C 6 connects, one end of the other end of the 6th capacitor C 6 and the 5th capacitor C 5, the negative electrode of variable capacitance diode D1, one end of the 5th resistance R 5, one end of the 6th resistance R 6 connects, the other end of the 5th resistance R 5 is connected with the movable end of the second potentiometer RW2, the movable end of the other end of the first capacitor C 1 and the first potentiometer RW1, the other end of the 3rd resistance R 3, the other end of the 4th capacitor C 4, the other end of the 5th capacitor C 5, the anode of variable capacitance diode D1, the other end of the 6th resistance R 6 connects and ground connection.
The utility model is a common base three-point oscillator circuit of capacitance, and the base stage of triode VT1 exchanges ground connection by the first capacitor C 1.After circuit powers up, the value of the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the first potentiometer RW1 makes triode VT1 be operated in magnifying state, initial circuit disturbing signal is amplified, after amplifying, the output terminals A point voltage is by the 4th capacitor C 4 and the 3rd capacitor C 3 dividing potential drops, feedback voltage on the 4th capacitor C 4 is as the positive feedback input signal of triode VT1 emitter, then carries out circulation amplify.Regulate the first potentiometer RW1 and can change the static working current of triode VT1, thereby change the oscillator output signal amplitude, the 4th capacitor C 4 and the 3rd capacitor C 5 determine the feedback factor of oscillator, and its value also can affect the output amplitude of oscillator signal.For improving frequency stability, the value of the 3rd capacitor C 3 and the 4th capacitor C 4 is much larger than the junction capacitance sum of the 5th capacitor C 5 and variable capacitance diode D1.The frequency of oscillator output signal is approximately
In formula (1), C
d1for the reverse barrier capacitance of variable capacitance diode, i.e. junction capacitance.
The 6th capacitor C 6 is for preventing that B point direct voltage from, directly in the output of A point, plaing every straight effect.Regulate the second potentiometer RW2, can change the working inverse voltage of variable capacitance diode D1, and then change the junction capacitance C of variable capacitance diode
d1, also just changed the total capacitance of oscillation circuit, the oscillator frequency of oscillation is changed, form voltage controlled oscillator.
Claims (1)
1. a voltage-controlled oscillator circuit, comprise triode VT1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the first potentiometer RW1, the second potentiometer RW2, vibration inductance L 1 and variable capacitance diode D1;
It is characterized in that: an end of described triode VT1 base stage and the first resistance R 1, the stiff end of the first potentiometer RW1, one end of the first capacitor C 1 connects, one end of the other end of the first resistance R 1 and the second resistance R 2, the stiff end of the second potentiometer RW2 connects and meets power supply+VCC, one end of the other end of the second resistance R 2 and the second capacitor C 2, the collector electrode of triode VT1 connects, one end of the emitter of triode VT1 and the 3rd resistance R 3, one end of the 3rd capacitor C 3, one end of the 4th capacitor C 4 connects, the other end of the other end of the second capacitor C 2 and the 3rd capacitor C 3, one end of vibration inductance L 1, one end of the 4th resistance R 4 connects and as output, the other end of vibration inductance L 1 and the other end of the 4th resistance R 4, one end of the 6th capacitor C 6 connects, one end of the other end of the 6th capacitor C 6 and the 5th capacitor C 5, the negative electrode of variable capacitance diode D1, one end of the 5th resistance R 5, one end of the 6th resistance R 6 connects, the other end of the 5th resistance R 5 is connected with the movable end of the second potentiometer RW2, the movable end of the other end of the first capacitor C 1 and the first potentiometer RW1, the other end of the 3rd resistance R 3, the other end of the 4th capacitor C 4, the other end of the 5th capacitor C 5, the anode of variable capacitance diode D1, the other end of the 6th resistance R 6 connects and ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320313951 CN203352538U (en) | 2013-06-03 | 2013-06-03 | Voltage-controlled oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320313951 CN203352538U (en) | 2013-06-03 | 2013-06-03 | Voltage-controlled oscillator circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203352538U true CN203352538U (en) | 2013-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320313951 Expired - Fee Related CN203352538U (en) | 2013-06-03 | 2013-06-03 | Voltage-controlled oscillator circuit |
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| CN (1) | CN203352538U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305962A (en) * | 2015-11-02 | 2016-02-03 | 苏州经贸职业技术学院 | Simple oscillator circuit |
| CN113847862A (en) * | 2021-10-09 | 2021-12-28 | 北京理工大学 | Signal conditioning circuit of capacitive sensor for penetration fuze |
-
2013
- 2013-06-03 CN CN 201320313951 patent/CN203352538U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305962A (en) * | 2015-11-02 | 2016-02-03 | 苏州经贸职业技术学院 | Simple oscillator circuit |
| CN113847862A (en) * | 2021-10-09 | 2021-12-28 | 北京理工大学 | Signal conditioning circuit of capacitive sensor for penetration fuze |
| CN113847862B (en) * | 2021-10-09 | 2023-11-24 | 北京理工大学 | Capacitive sensor signal conditioning circuit for penetration fuze |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20150603 |
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| EXPY | Termination of patent right or utility model |