CN204316438U - A kind of low noise frequency multiplier - Google Patents
A kind of low noise frequency multiplier Download PDFInfo
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- CN204316438U CN204316438U CN201420702060.3U CN201420702060U CN204316438U CN 204316438 U CN204316438 U CN 204316438U CN 201420702060 U CN201420702060 U CN 201420702060U CN 204316438 U CN204316438 U CN 204316438U
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Abstract
The utility model discloses a kind of low noise frequency multiplier, primarily of buffer circuit, the Voltage-Controlled oscillation circuit be connected with buffer circuit, the microwave circuit be connected with Voltage-Controlled oscillation circuit, the control circuit be connected with microwave circuit forms, and it is characterized in that: be also provided with phase-locked loop circuit at control circuit output; Described phase-locked loop circuit is by triode VT3, triode VT4, triode VT5, the electric capacity C10 that positive pole is connected with control circuit, negative pole is connected with the base stage of triode VT3, the compositions such as the resistance R6 that one end is connected with the collector electrode of triode VT3, the other end is connected with the collector electrode of triode VT3 after resistance R5 through resistance R4; The utility model is provided with phase-locked loop circuit, and it can make the signal of frequency multiplier stable output, avoids producing noise, makes the range of application of frequency multiplier wider.
Description
Technical field
The utility model relates to electronic applications, specifically refers to a kind of low noise frequency multiplier.
Background technology
Frequency multiplier makes output signal frequency equal the circuit of frequency input signal integral multiple.Along with the development of electronic technology, frequency multiplier application is more and more extensive, as master oscillator made to vibrate at lower frequency, to improve frequency stability after transmitter employing frequency multiplier; Frequency modulation equipment frequency multiplier increases frequency shift (FS); In phase keying communication equipment, frequency multiplier is an important composition unit of carrier recovery circuit.But the frequency multiplier used at present makes phase of output signal unstable because producing a large amount of harmonic wave, thus make frequency multiplier noise excessive.Its frequency multiplication number of times is higher, and times audio-frequency noise is larger, and the application of frequency multiplier is restricted, and is being required then cannot use in the equipment that times audio-frequency noise is less by it.
Utility model content
The purpose of this utility model is to overcome the excessive defect of current frequency multiplier noise, provides a kind of low noise frequency multiplier.
The following technical scheme of the purpose of this utility model realizes: a kind of low noise frequency multiplier, primarily of buffer circuit, the Voltage-Controlled oscillation circuit be connected with buffer circuit, the microwave circuit be connected with Voltage-Controlled oscillation circuit, the control circuit be connected with microwave circuit, also phase-locked loop circuit is provided with at control circuit output, it is by triode VT3, triode VT4, triode VT5, positive pole is connected with control circuit, the electric capacity C10 that negative pole is connected with the base stage of triode VT3, one end is connected with the collector electrode of triode VT3, the resistance R6 that the other end is connected with the collector electrode of triode VT3 after resistance R5 through resistance R4, negative pole is connected with the collector electrode of triode VT4 after resistance R7 through resistance R8, the electric capacity C11 that positive pole is connected with the emitter of triode VT3, and the electric capacity C12 that negative pole is connected with its positive pole after resistance R9 through resistance R10 forms, the collector electrode of described triode VT5 is connected with the negative pole of electric capacity C12, emitter is connected with the emitter of triode VT4, base stage is connected with the negative pole of electric capacity C11, the base stage of triode VT4 is connected with the positive pole of electric capacity C12, emitter is connected with the collector electrode of triode VT3, the collector electrode of triode VT3 is connected with control circuit, resistance R4 is connected with the negative pole of electric capacity C10 with the tie point of resistance R5, and resistance R10 is connected with the tie point of resistance R8 and resistance R7 and the tie point of resistance R6 and resistance R4 mutually with the tie point of resistance R9.
Described buffer circuit comprises electric capacity C1, electric capacity C2, inductance L 1, inductance L 2; The negative pole of electric capacity C1 is connected with Voltage-Controlled oscillation circuit after inductance L 2 through inductance L 1, positive pole is connected with Voltage-Controlled oscillation circuit, and the negative pole of electric capacity C2 is connected with the tie point of inductance L 2 with inductance L 1, positive pole is connected with the positive pole of electric capacity C1.
Described Voltage-Controlled oscillation circuit is by the chip U that vibrates, positive pole is connected with the VCC pin of vibration chip U after resistance R1 through resistance R2, the electric capacity C3 of minus earth, positive pole is connected with the VCC pin of vibration chip U, the electric capacity C5 of minus earth, the electric capacity C6 that OUT pin is connected, negative pole is connected with microwave circuit of positive pole and vibration chip U, and positive pole is connected with the CONT pin of vibration chip U, the electric capacity C4 of minus earth forms; The DISCH pin of described vibration chip U is connected with inductance L 2, RESET pin is connected with VCC pin, VCC pin is connected with external power source, GND pin ground connection, TRIG pin are connected with TRIG pin as an input of circuit, THRES pin.
Described microwave circuit is by diode D1, and diode D2, diode D3, electric capacity C7, electric capacity C8, electric capacity C9 form; The P pole of diode D2 is connected with the negative pole of electric capacity C6, N pole is connected with control circuit, the P pole of diode D1 is connected with the positive pole of electric capacity C5, N pole is connected with the positive pole of electric capacity C5 after diode D3 and electric capacity C7 through electric capacity C8, and the negative pole of electric capacity C9 is connected with control circuit with the positive pole of electric capacity C5 simultaneously, positive pole is connected with the tie point of electric capacity C8 and diode D3 and control circuit simultaneously.
Described control circuit is by triode VT1, triode VT2, the voltage stabilizing didoe D4 that P pole is connected with the negative pole of electric capacity C9, N pole is connected with the base stage of triode VT1, the resistance R3 that one end is connected with the P pole of voltage stabilizing didoe D4, the other end is connected with the emitter of triode VT1, and the diode D5 that P pole is connected with the collector electrode of triode VT1, N pole is connected with the positive pole of electric capacity C9 forms; The emitter of described triode VT1 is connected with the base stage of triode VT2, base stage is connected with the N pole of diode D2, and grounded collector, the emitter of triode VT2 are connected with the positive pole of electric capacity C9 and the collector electrode of triode VT3 simultaneously.
The utility model compared with prior art, has the following advantages and beneficial effect:
(1) the utility model is provided with phase-locked loop circuit, and it can make the signal of frequency multiplier stable output, avoids producing noise.
(2) the utility model noise is low, makes the range of application of frequency multiplier wider.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, low noise frequency multiplier of the present utility model, primarily of buffer circuit, the Voltage-Controlled oscillation circuit be connected with buffer circuit, the microwave circuit be connected with Voltage-Controlled oscillation circuit, the control circuit be connected with microwave circuit forms.In order to realize the utility model, be also provided with phase-locked loop circuit at control circuit output.
Wherein, phase-locked loop circuit is by triode VT3, triode VT4, triode VT5, the electric capacity C10 that positive pole is connected with control circuit, negative pole is connected with the base stage of triode VT3, the resistance R6 that one end is connected with the collector electrode of triode VT3, the other end is connected with the collector electrode of triode VT3 after resistance R5 through resistance R4, the electric capacity C11 that negative pole is connected with the collector electrode of triode VT4 after resistance R7 through resistance R8, positive pole is connected with the emitter of triode VT3, and the electric capacity C12 that negative pole is connected with its positive pole after resistance R9 through resistance R10 forms; The collector electrode of described triode VT5 is connected with the negative pole of electric capacity C12, emitter is connected with the emitter of triode VT4, base stage is connected with the negative pole of electric capacity C11, the base stage of triode VT4 is connected with the positive pole of electric capacity C12, emitter is connected with the collector electrode of triode VT3, the collector electrode of triode VT3 is connected with control circuit, resistance R4 is connected with the negative pole of electric capacity C10 with the tie point of resistance R5, and resistance R10 is connected with the tie point of resistance R8 and resistance R7 and the tie point of resistance R6 and resistance R4 mutually with the tie point of resistance R9.By the effect of phase-locked loop circuit, enable the signal of frequency multiplier stable output, thus avoid producing noise when frequency multiplication.
Simultaneous buffering circuit comprises electric capacity C1, electric capacity C2, inductance L 1, inductance L 2; The negative pole of electric capacity C1 is connected with Voltage-Controlled oscillation circuit after inductance L 2 through inductance L 1, positive pole is connected with Voltage-Controlled oscillation circuit, and the negative pole of electric capacity C2 is connected with the tie point of inductance L 2 with inductance L 1, positive pole is connected with the positive pole of electric capacity C1.
Voltage-Controlled oscillation circuit is by the chip U that vibrates, positive pole is connected with the VCC pin of vibration chip U after resistance R1 through resistance R2, the electric capacity C3 of minus earth, positive pole is connected with the VCC pin of vibration chip U, the electric capacity C5 of minus earth, the electric capacity C6 that OUT pin is connected, negative pole is connected with microwave circuit of positive pole and vibration chip U, and positive pole is connected with the CONT pin of vibration chip U, the electric capacity C4 of minus earth forms; The DISCH pin of described vibration chip U is connected with inductance L 2, RESET pin is connected with VCC pin, VCC pin is connected with external power source, GND pin ground connection, TRIG pin are connected with TRIG pin as an input of circuit, THRES pin.Vibration chip U is preferably NE555 integrated chip.
Microwave circuit is by diode D1, and diode D2, diode D3, electric capacity C7, electric capacity C8, electric capacity C9 form; The P pole of diode D2 is connected with the negative pole of electric capacity C6, N pole is connected with control circuit, the P pole of diode D1 is connected with the positive pole of electric capacity C5, N pole is connected with the positive pole of electric capacity C5 after diode D3 and electric capacity C7 through electric capacity C8, and the negative pole of electric capacity C9 is connected with control circuit with the positive pole of electric capacity C5 simultaneously, positive pole is connected with the tie point of electric capacity C8 and diode D3 and control circuit simultaneously.
In order to make frequency of oscillation strict be locked in incoming frequency doubly take advantage of in value, be therefore provided with control circuit.It is by triode VT1, triode VT2, the voltage stabilizing didoe D4 that P pole is connected with the negative pole of electric capacity C9, N pole is connected with the base stage of triode VT1, the resistance R3 that one end is connected with the P pole of voltage stabilizing didoe D4, the other end is connected with the emitter of triode VT1, and the diode D5 that P pole is connected with the collector electrode of triode VT1, N pole is connected with the positive pole of electric capacity C9 forms; The emitter of described triode VT1 is connected with the base stage of triode VT2, base stage is connected with the N pole of diode D2, and grounded collector, the emitter of triode VT2 are connected with the positive pole of electric capacity C9 and the collector electrode of triode VT3 simultaneously.
As mentioned above, just well the utility model can be realized.
Claims (5)
1. a low noise frequency multiplier, primarily of buffer circuit, the Voltage-Controlled oscillation circuit be connected with buffer circuit, the microwave circuit be connected with Voltage-Controlled oscillation circuit, the control circuit be connected with microwave circuit forms, and it is characterized in that: be also provided with phase-locked loop circuit at control circuit output; Described phase-locked loop circuit is by triode VT3, triode VT4, triode VT5, the electric capacity C10 that positive pole is connected with control circuit, negative pole is connected with the base stage of triode VT3, the resistance R6 that one end is connected with the collector electrode of triode VT3, the other end is connected with the collector electrode of triode VT3 after resistance R5 through resistance R4, the electric capacity C11 that negative pole is connected with the collector electrode of triode VT4 after resistance R7 through resistance R8, positive pole is connected with the emitter of triode VT3, and the electric capacity C12 that negative pole is connected with its positive pole after resistance R9 through resistance R10 forms; The collector electrode of described triode VT5 is connected with the negative pole of electric capacity C12, emitter is connected with the emitter of triode VT4, base stage is connected with the negative pole of electric capacity C11, the base stage of triode VT4 is connected with the positive pole of electric capacity C12, emitter is connected with the collector electrode of triode VT3, the collector electrode of triode VT3 is connected with control circuit, resistance R4 is connected with the negative pole of electric capacity C10 with the tie point of resistance R5, and resistance R10 is connected with the tie point of resistance R8 and resistance R7 and the tie point of resistance R6 and resistance R4 mutually with the tie point of resistance R9.
2. a kind of low noise frequency multiplier according to claim 1, is characterized in that: described buffer circuit comprises electric capacity C1, electric capacity C2, inductance L 1, inductance L 2; The negative pole of electric capacity C1 is connected with Voltage-Controlled oscillation circuit after inductance L 2 through inductance L 1, positive pole is connected with Voltage-Controlled oscillation circuit, and the negative pole of electric capacity C2 is connected with the tie point of inductance L 2 with inductance L 1, positive pole is connected with the positive pole of electric capacity C1.
3. a kind of low noise frequency multiplier according to claim 2, it is characterized in that: described Voltage-Controlled oscillation circuit is by the chip U that vibrates, positive pole is connected with the VCC pin of vibration chip U after resistance R1 through resistance R2, the electric capacity C3 of minus earth, positive pole is connected with the VCC pin of vibration chip U, the electric capacity C5 of minus earth, the electric capacity C6 that OUT pin is connected, negative pole is connected with microwave circuit of positive pole and vibration chip U, and positive pole is connected with the CONT pin of vibration chip U, the electric capacity C4 of minus earth forms; The DISCH pin of described vibration chip U is connected with inductance L 2, RESET pin is connected with VCC pin, VCC pin is connected with external power source, GND pin ground connection, TRIG pin are connected with TRIG pin as an input of circuit, THRES pin.
4. a kind of low noise frequency multiplier according to claim 3, is characterized in that: described microwave circuit is by diode D1, and diode D2, diode D3, electric capacity C7, electric capacity C8, electric capacity C9 form; The P pole of diode D2 is connected with the negative pole of electric capacity C6, N pole is connected with control circuit, the P pole of diode D1 is connected with the positive pole of electric capacity C5, N pole is connected with the positive pole of electric capacity C5 after diode D3 and electric capacity C7 through electric capacity C8, and the negative pole of electric capacity C9 is connected with control circuit with the positive pole of electric capacity C5 simultaneously, positive pole is connected with the tie point of electric capacity C8 and diode D3 and control circuit simultaneously.
5. a kind of low noise frequency multiplier according to claim 4, it is characterized in that: described control circuit is by triode VT1, triode VT2, the voltage stabilizing didoe D4 that P pole is connected with the negative pole of electric capacity C9, N pole is connected with the base stage of triode VT1, the resistance R3 that one end is connected with the P pole of voltage stabilizing didoe D4, the other end is connected with the emitter of triode VT1, and the diode D5 that P pole is connected with the collector electrode of triode VT1, N pole is connected with the positive pole of electric capacity C9 forms; The emitter of described triode VT1 is connected with the base stage of triode VT2, base stage is connected with the N pole of diode D2, and grounded collector, the emitter of triode VT2 are connected with the positive pole of electric capacity C9 and the collector electrode of triode VT3 simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420702060.3U CN204316438U (en) | 2014-11-19 | 2014-11-19 | A kind of low noise frequency multiplier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420702060.3U CN204316438U (en) | 2014-11-19 | 2014-11-19 | A kind of low noise frequency multiplier |
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| CN204316438U true CN204316438U (en) | 2015-05-06 |
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| CN201420702060.3U Expired - Fee Related CN204316438U (en) | 2014-11-19 | 2014-11-19 | A kind of low noise frequency multiplier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852689A (en) * | 2014-11-19 | 2015-08-19 | 成都冠深科技有限公司 | Low-noise frequency multiplier based on pulse amplification trigger circuit |
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2014
- 2014-11-19 CN CN201420702060.3U patent/CN204316438U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852689A (en) * | 2014-11-19 | 2015-08-19 | 成都冠深科技有限公司 | Low-noise frequency multiplier based on pulse amplification trigger circuit |
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| 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: 20150506 Termination date: 20151119 |
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| EXPY | Termination of patent right or utility model |