CN106961209A - A kind of radio frequency reception power supply circuit and radio frequency reception terminal - Google Patents
A kind of radio frequency reception power supply circuit and radio frequency reception terminal Download PDFInfo
- Publication number
- CN106961209A CN106961209A CN201610840012.4A CN201610840012A CN106961209A CN 106961209 A CN106961209 A CN 106961209A CN 201610840012 A CN201610840012 A CN 201610840012A CN 106961209 A CN106961209 A CN 106961209A
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- Prior art keywords
- radio frequency
- frequency reception
- transformer
- power supply
- circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The present invention provides a kind of radio frequency reception power supply circuit, and it includes rectification circuit, filter circuit, self-maintained circuit and the load circuit being sequentially connected；The self-maintained circuit is used to after self-oscillation and progress voltage and current regulation input filtered electric energy to load circuit, and the input of the rectification circuit is connected with resistance adjustment module.The radio frequency reception power supply circuit and radio frequency reception terminal of the embodiment of the present invention have the advantages that stability in use and reliability is high and output EMI is low.
Description
Technical field
The present invention relates to radio frequency arts, more particularly to a kind of radio frequency reception power supply circuit and radio frequency reception terminal.
Background technology
Current portable set, the power supply circuit of the electronic equipment especially with radio frequency reception function in design,
It is commonly designed that unreasonable or method for designing is improper, easily causes the EMI that the radio frequency reception power supply circuit of design is exported when in use
It is larger, larger electromagnetic interference is caused, so as to influence the use of radio frequency reception equipment stable and performance.
A kind of radio frequency reception power supply circuit and radio frequency that use is reliable and stable and output electromagnetic interference is low is how designed to connect
Receive the problem that terminal is industry urgent need to resolve.
The content of the invention
It is a primary object of the present invention to provide a kind of radio frequency reception power supply circuit and radio frequency reception terminal, it is intended to which solution is penetrated
The technical problem that frequency receives the power supply stabilization of power supply circuit and reliability is low and output electromagnetic interference is big.
To achieve the above object, the present invention provides a kind of radio frequency reception power supply circuit, and it includes：
Rectification circuit, filter circuit, self-maintained circuit and the load circuit being sequentially connected；The self-maintained circuit is used
Inputted in by filtered electric energy after self-oscillation and progress voltage and current regulation to load circuit, the rectification circuit
Input is connected with resistance adjustment module.
Preferably, the self-maintained circuit includes transformer, first resistor, second resistance and the first triode, described
Transformer includes the first input end of Same Name of Ends, the first output end each other, and the second input of Same Name of Ends, second defeated each other
Go out end, the first resistor, second resistance are arranged in series in the first output end of the transformer and the base stage of the first triode
Between, the emitter stage of first triode is with a resistance eutral grounding, the second output of the colelctor electrode and transformer of the first triode
End connection；
On connecting line of the input of the transformer through the first capacitance connection to the first resistor and second resistance；Institute
Filter circuit output end is stated to be connected on the connecting line of the first resistor and the output end of transformer first.
Preferably, the resistance adjustment module includes adjustable resistance.
Preferably, overvoltage crowbar is provided between the base stage and emitter stage of first triode to be used for when from institute
State emitter stage input to the voltage of overvoltage crowbar be higher than voltage preset value when, overvoltage crowbar control shut-off is described
First triode.
Preferably, the first input end of the load is connected with the first output end of the transformer, and the second of load is defeated
Enter end to be connected with the second output end of the transformer through a commutation diode, and the anode of the commutation diode becomes with described
The second output end connection of depressor.
Preferably, the first input end ground connection of the load, the second input of load through a commutation diode with it is described
Second output end of transformer is connected, and the anode of the commutation diode is connected with the second output end of the transformer.
Preferably, resistance and electric capacity have been arranged in parallel between the first input end of the load, the second input of load.
A kind of radio frequency reception terminal, it includes above-mentioned radio frequency reception power supply circuit.
Compared to prior art, in the radio frequency reception power supply circuit of the embodiment of the present invention, by setting self-oscillation electricity
Road is used to after self-oscillation and progress voltage and current regulation input filtered electric energy to load circuit so as to load
The power factor (PF) that circuit is provided is high and harmonic distortion is small, while no matter the first triode as switching tube ends in zero current,
Or when no-voltage is turned on, the EMI of generation is than relatively low, while by setting a resistance to adjust in the output end of the rectification circuit
The resistance of whole radio frequency reception power supply circuit is adjusted section module, can further reduce whole radio frequency reception and power
The EMI of circuit, improves greatly the use reliability and stability of radio frequency reception power supply circuit and substantially reduces EMI.
Therefore, the radio frequency reception power supply circuit and radio frequency reception terminal of the embodiment of the present invention have output stable and reliability
Height, and the low advantage of electromagnetic interference produced.
Brief description of the drawings
Fig. 1 is the structural representation of the radio frequency reception power supply circuit of a preferred embodiments of the invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Reference picture 1, Fig. 1 is the structural representation of the radio frequency reception power supply circuit of a preferred embodiments of the invention.
Radio frequency reception power supply circuit includes the rectification circuit 10, filter circuit 20, the and of self-maintained circuit 30 being sequentially connected
Load circuit 40；The self-maintained circuit 30 is used for filtered electric energy through self-oscillation and progress voltage and current regulation
After input to load circuit 40.The input of the rectification circuit is connected with resistance adjustment module R100, in a specific embodiment
In, resistance adjustment module R100 includes adjustable resistance, and the resistance adjustable range of the adjustable resistance is in 4 to 150 Europe.It is described whole
Current circuit 10 and filter circuit 20 may be configured as conventional rectification circuit.
Specifically, the self-maintained circuit 30 includes transformer T1, first resistor R1, second resistance R2 and the one or three pole
Pipe Q1, the transformer T1 include the first input end T10 of Same Name of Ends, the first output end T20 each other, and Same Name of Ends each other
Second input T11, the second output end T21, the first resistor R1, second resistance R2 are arranged in series in the transformer T1's
Between first output end T20 and the first triode Q1 base stage B, the emitter E of the first triode Q1 through a resistance eutral grounding,
First triode Q1 colelctor electrode C and transformer T1 the second output end T21 are connected；The first input end of the load circuit 40
41, resistance and electric capacity have been arranged in parallel between the second input 42 of load circuit 40.First input of the load circuit 40
End 41, the second input 42 of load circuit 40 is connected or sensed connection with the output end of the transformer T1.
In one embodiment, the first input end T10 of the transformer T1 is connected to first electricity through the first electric capacity C1
Hinder on R1 and second resistance R2 connecting lines；The output end 21 of filter circuit 20 is connected to the first resistor R1 and transformer T1
On first output end T10 connecting line.
In one embodiment, the first output end of the first input end 41 of the load circuit 40 and the transformer T1
T10 connections, second output end T21 of second input 42 through a commutation diode D1 Yu the transformer T1 of load circuit 40
Connect, and the anode of the commutation diode D is connected with the second output end T21 of the transformer T1.
In one embodiment, the first input end of above-mentioned load circuit can also be grounded, the second input of load circuit
End is connected through a commutation diode with the second output end of the transformer, and the anode of the commutation diode and the transformation
The second output end connection of device.
Above-mentioned radio frequency reception power supply circuit operation principle：Radio frequency reception power supply circuit is by rectification circuit 10 above, filter
The rectification of wave circuit 20 considers ripple and obtains pulsating direct current, and the one or three is given by resistance the first resistor R1, second resistance R2 for startup
Pole pipe Q1 provide base current, transformer T1 sense first output end of transformer 8 just, transformer the second output end 7 it is negative
Induced electromotive force, while sensing that one transformer first input end T10 of assists winding is just the second input of transformer T11
For negative induced electromotive force, this electromotive force is further strengthened by the first electric capacity C1 (just having started the first electric capacity C1 equivalent to short circuit)
First triode Q1 is turned on, and the first triode Q1 enters saturation conduction quickly, and with the first electric capacity C1 constantly chargings, there is provided be given to
First triode Q1 base current, which declines, which works as to drop to, can not maintain the first triode Q1 saturation conductions and enter amplification region,
Collecting radio stream can not be linearly increasing, and now induction electric will definitely be overturn, and one the first output end of transformer 8 of formation is negative, become
The positive induced electromotive force of depressor the second output end 7, one transformer first input end T10 of assists winding formation is negative, transformer
Second input T11 is positive induced electromotive force, and transformer first input end T10 is negative, and the second input of transformer T11 is just
Induced electromotive force be further exacerbated by the first triode Q1 shut-offs, the first electric capacity C1 discharged, after the first triode Q1 is turned off
The energy of transformer T1 storages discharges when energy discharges the cycle for completing and repeating the above.Meanwhile, in foregoing circuit, use
No matter make the first triode Q1 of switching tube in zero current cut-off, or when no-voltage is turned on, the EMI of generation
(Electromagnetic Interference, EMI) is all than relatively low.And set further through the output end in the rectification circuit 10
Put a resistance adjustment module R100 resistance of whole radio frequency reception power supply circuit is adjusted, can further reduce whole
The EMI of individual radio frequency reception power supply circuit, improves greatly the use reliability and stability and significantly of radio frequency reception power supply circuit
Reduce EMI.
It is worth noting that, the first triode in above-described embodiment may be arranged as metal-oxide-semiconductor.
In embodiments of the invention, when the load of load circuit 40 is fixed, first resistor R1, second can be generally adjusted
Resistance R2, transformer T1 and the first electric capacity C1 parameter are that can obtain the electric current that load needs, and to the confession of load circuit 40
Electrical power factor value is higher, and harmonic distortion is small.Meanwhile, (Electromagnetic Interference are referred to as by the EMI of generation
EMI) than relatively low, the use reliability and stability of radio frequency reception power supply circuit are greatly improved.
Compared to prior art, in the radio frequency reception power supply circuit of the embodiment of the present invention, by setting self-oscillation electricity
Road 30 is used to after self-oscillation and progress voltage and current regulation input filtered electric energy to load circuit 40 so that right
The power factor (PF) that load circuit 40 is provided is high and harmonic distortion is small, while no matter the first triode Q1 as switching tube is in zero electricity
Stream cut-off, or when no-voltage is turned on, the EMI of generation is than relatively low, while by being set in the output end of the rectification circuit 10
Put a resistance adjustment module R100 resistance of whole radio frequency reception power supply circuit is adjusted, can further reduce whole
The EMI of individual radio frequency reception power supply circuit, improves greatly the use reliability and stability and significantly of radio frequency reception power supply circuit
Reduce EMI.
The present invention also provides a kind of radio frequency reception terminal, and it includes above-mentioned radio frequency reception power supply circuit.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of radio frequency reception power supply circuit, it is characterised in that it includes：
Rectification circuit, filter circuit, self-maintained circuit and the load circuit being sequentially connected；The self-maintained circuit is used for will
Filtered electric energy is inputted to load circuit through self-oscillation and after carrying out voltage and current regulation, the input of the rectification circuit
End is connected with resistance adjustment module.
2. radio frequency reception power supply circuit according to claim 1, it is characterised in that the self-maintained circuit includes transformation
Device, first resistor, second resistance and the first triode, the transformer include the first input end of Same Name of Ends, first defeated each other
Go out end, and the second input of Same Name of Ends, the second output end each other, the first resistor, second resistance are arranged in series in institute
State between the first output end of transformer and the base stage of the first triode, the emitter stage of first triode is connect with a resistance
Ground, the colelctor electrode of the first triode and the second output end of transformer are connected；
On connecting line of the input of the transformer through the first capacitance connection to the first resistor and second resistance；The filter
Wave circuit output end is connected on the connecting line of the first resistor and the output end of transformer first.
3. radio frequency reception power supply circuit according to claim 2, it is characterised in that the resistance adjustment module includes adjustable
Resistance.
4. radio frequency reception power supply circuit according to claim 2, it is characterised in that first triode base stage and
Overvoltage crowbar is provided between emitter stage to be used for when inputting voltage to overvoltage crowbar higher than electric from the emitter stage
When pressing preset value, the overvoltage crowbar control shut-off first triode.
5. radio frequency reception power supply circuit according to claim 2, it is characterised in that the first input end of the load and institute
State the first output end connection of transformer, second output of second input through a commutation diode and the transformer of load
End is connected, and the anode of the commutation diode is connected with the second output end of the transformer.
6. radio frequency reception power supply circuit according to claim 2, it is characterised in that the first input end of the load connects
Ground, the second input of load is connected through a commutation diode with the second output end of the transformer, and the pole of the rectification two
The anode of pipe is connected with the second output end of the transformer.
7. radio frequency reception power supply circuit according to claim 1, it is characterised in that the first input end of the load, bears
Resistance and electric capacity have been arranged in parallel between the second input carried.
8. a kind of radio frequency reception terminal, it includes the radio frequency reception power supply circuit any one of the claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840012.4A CN106961209A (en) | 2016-09-21 | 2016-09-21 | A kind of radio frequency reception power supply circuit and radio frequency reception terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840012.4A CN106961209A (en) | 2016-09-21 | 2016-09-21 | A kind of radio frequency reception power supply circuit and radio frequency reception terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106961209A true CN106961209A (en) | 2017-07-18 |
Family
ID=59481703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610840012.4A Pending CN106961209A (en) | 2016-09-21 | 2016-09-21 | A kind of radio frequency reception power supply circuit and radio frequency reception terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106961209A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6128206A (en) * | 1999-03-12 | 2000-10-03 | Ericsson, Inc. | Clamping circuit and method for synchronous rectification |
| US6366027B1 (en) * | 1999-11-19 | 2002-04-02 | U.S. Philips Corporation | Circuit device for operating a discharge lamp by means of a high-frequency current |
| CN201887981U (en) * | 2010-11-06 | 2011-06-29 | 何志雄 | Driving power supply of LED lamp |
| CN105682287A (en) * | 2016-01-29 | 2016-06-15 | 深圳和而泰照明科技有限公司 | Power supply circuit applied to fixed load and LED illuminating apparatus |
| CN205546049U (en) * | 2016-01-29 | 2016-08-31 | 深圳和而泰照明科技有限公司 | Power supply circuit and LED lighting device |
-
2016
- 2016-09-21 CN CN201610840012.4A patent/CN106961209A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6128206A (en) * | 1999-03-12 | 2000-10-03 | Ericsson, Inc. | Clamping circuit and method for synchronous rectification |
| US6366027B1 (en) * | 1999-11-19 | 2002-04-02 | U.S. Philips Corporation | Circuit device for operating a discharge lamp by means of a high-frequency current |
| CN201887981U (en) * | 2010-11-06 | 2011-06-29 | 何志雄 | Driving power supply of LED lamp |
| CN105682287A (en) * | 2016-01-29 | 2016-06-15 | 深圳和而泰照明科技有限公司 | Power supply circuit applied to fixed load and LED illuminating apparatus |
| CN205546049U (en) * | 2016-01-29 | 2016-08-31 | 深圳和而泰照明科技有限公司 | Power supply circuit and LED lighting device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170718 |
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| RJ01 | Rejection of invention patent application after publication |