CN204858705U - Mobile phone charger - Google Patents
Mobile phone charger Download PDFInfo
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- CN204858705U CN204858705U CN201520609833.8U CN201520609833U CN204858705U CN 204858705 U CN204858705 U CN 204858705U CN 201520609833 U CN201520609833 U CN 201520609833U CN 204858705 U CN204858705 U CN 204858705U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a mobile phone charger, including input rectification filter circuit, the DC -DC transfer circuit, master control circuit, power supply circuit, a transformer, secondary rectification filter circuit, the voltage control circuit, USB output circuit, input rectification filter circuit sends filtering signal to DC -DC transfer circuit, the DC -DC transfer circuit sends switch transformed signal to transformer, the transformer sends vary voltage signal to secondary rectification filter circuit and power supply circuit, secondary rectification filter circuit sends filtering signal to USB output circuit, USB output circuit sends the output signal of telecommunication to voltage control circuit, power supply circuit sends signal battery and control signal to master control circuit respectively with the voltage control circuit, master control circuit sends control signal to DC -DC transfer circuit. This charger has the excessive pressure, overflows, short -circuit protection, and circuit switching is efficient, standby loss low grade function.
Description
Technical field
The utility model relates to charger for mobile phone.
Background technology
Along with country is to the attention of domestic electronic appliances safety, the standard of state adversary machine charger is tighter, and the efficiency of existing a lot of charger is not high simultaneously, low, the easy short circuit of fail safe.Just there is the demand to high-level charger for mobile phone in market.
Utility model content
The purpose of this utility model is to provide a kind of low cost, low-power consumption, high efficiency charger for mobile phone.
Charger for mobile phone of the present utility model, comprises input rectifying filter circuit, DC-DC conversion circuit, governor circuit, power circuit, transformer, secondary commutation filter circuit, USB output circuit, voltage control circuit.
Input rectifying filter circuit sends filtering signal to DC-DC conversion circuit.
DC-DC conversion circuit transmit button figure signal is to transformer.
Transformer sends variable voltage signal to secondary commutation filter circuit and power circuit.
Secondary commutation filter circuit sends filtering signal to USB output circuit.
USB output circuit sends electrical output signal to voltage control circuit.
Power circuit and voltage control circuit send power supply signal respectively and control signal to governor circuit.
Governor circuit sends a control signal to DC-DC conversion circuit.
DC-DC conversion circuit is inputted after alternating current is become direct current by the input rectifying filter circuit in the utility model, DC-DC conversion circuit plays current stabilization effect, control power, protection DC circuit, after voltage signal after current stabilization enters transformer, transfer magnetic field energy to by electric energy to store, change electric energy into again, secondary commutation filter circuit is input into different voltage, be transformed into direct current again, by USB output circuit stable output voltage, realize the charging to mobile phone, and charging voltage signal is also sent to voltage control circuit by USB output circuit, voltage control circuit controls stable charging voltage, transmit control signal to governor circuit, after current signal in governor circuit testing circuit and process voltage control circuit feed back the voltage signal come, transmit control signal to DC-DC conversion circuit, control the further constant current constant voltage of DC-DC conversion circuit, meanwhile, the signal after transformer shift voltage is sent to power circuit, and power circuit is powered to governor circuit.The utility model can realize to mobile phone constant current constant voltage, high efficiency charging.
In some embodiments, input rectifying filter circuit comprises GB first flat pin L, the flat pin N of GB second on shell, insurance F1, X electric capacity CX1, rectifier bridge BD1, the first filter capacitor C1, the second filter capacitor C2, filter inductance L1, and the first flat pin L is that phase line input is connected with one end of insurance F1; The other end of insurance F1 is connected with the first input end of rectifier bridge BD1, one end of X electric capacity CX1; Another input of rectifier bridge BD1 is connected with the other end of the flat pin N of GB second and X electric capacity CX1, and wherein N is zero line; The positive terminal of the filter circuit that the positive terminal of rectifier bridge BD1 forms with the first filter capacitor C1, the second filter capacitor C2, filter inductance L1 is connected; The negative pole end of the filter circuit that the negative pole end of rectifier bridge BD1 forms with the first filter capacitor C1, the second filter capacitor C2, filter inductance L1 is connected.Thus; alternating current is after two pin inputs; by rectifier bridge BD1, Rectified alternating current is rectified into it; again through filter capacitor and filter inductance; produce the direct current of voltage stabilizing, the normal work that can be DC-DC conversion circuit provides power supply, simultaneously; insurance F1 plays the effect of protective circuit, and X electric capacity CX1 suppresses charger to the conduction interference of electrical network.
In some embodiments, DC-DC conversion circuit comprises the surge absorbing circuit of metal-oxide-semiconductor Q1, resistance R6, electric capacity C9, diode D3 composition, and the source electrode of metal-oxide-semiconductor Q1 is connected with Same Name of Ends second port of primary; The grid of metal-oxide-semiconductor Q1 is connected with governor circuit; The drain electrode of metal-oxide-semiconductor Q1 is connected with one end of current sense resistor R21; Between the source electrode that surge absorbing circuit is connected on metal-oxide-semiconductor Q1 and the positive terminal of filter circuit.Thus, surge absorbing circuit Absorbable rod surge current and surge current, MOS Absorbable organic halogens voltage, they can convert electrical energy into magnetic field energy and be stored in transformer, and utilize transformer magnetic field energy to be converted to electric energy supply secondary commutation filter circuit.
In some embodiments, governor circuit comprises PMW modulator U1, current sense resistor R21, high voltage detects the 12 resistance R12, high voltage detects the 13 resistance R13, start the 3rd resistance R3, start the 4th resistance R4; The one end starting the 3rd resistance R3 is connected with the positive terminal of input rectifying filter circuit, and its other end is connected with startup the 4th resistance R4; The other end starting the 4th resistance R4 is connected with PWM device U1; The current signal that current sense resistor R21 detects is by PWM device U1 process; PWM device U1 also processes the voltage signal that voltage control circuit feedback is come simultaneously.Thus, by the work of PWM device U1 automatic regulating impulse Duty ratio control DC-DC conversion circuit, control the electric current by metal-oxide-semiconductor Q1, in order to avoid damage metal-oxide-semiconductor, simultaneously by the work that high voltage detects the 12 resistance R12, the 13 R13 monitors transformer, and start the 3rd resistance R3 and start the 4th resistance R4 startup U1 used.
In some embodiments, power circuit is by input, current rectifying and wave filtering circuit, voltage stabilizing circuit, wherein current rectifying and wave filtering circuit comprises the 4th diode D4 and the 5th capacitor C5, and voltage stabilizing circuit comprises the 5th resistance R5, the tenth resistance R10, the second triode Q2, the 3rd voltage-stabiliser tube ZD3, the 3rd electric capacity C3; Input and transformer feedback Motor Winding Same Name of Ends the 4th port are connected with current rectifying and wave filtering circuit; Current rectifying and wave filtering circuit is connected with voltage stabilizing circuit; Voltage stabilizing circuit is connected with governor circuit.Thus, the magnetic field energy in transformer transfers to after electric energy through winding, after the current rectifying and wave filtering circuit in power circuit, change DC power supply into, then through voltage stabilizing circuit voltage stabilizing, for PWM device U1 provides operating voltage after governor circuit startup work.
In some embodiments, transformer is made up of armature winding, secondary winding, feedback winding, and armature winding Same Name of Ends second port is connected with DC-DC conversion circuit; Armature winding different name end first port is connected with input rectifying filter circuit; Secondary winding Same Name of Ends five-port is connected with secondary commutation filter circuit; Feedback Motor Winding Same Name of Ends the 4th port is connected with power circuit.Thus, transformer is as an energy transmission, and it converts the electric energy of DC-DC conversion circuit to magnetic field energy, then magnetic field energy is converted to electric energy and is released to secondary commutation filter circuit.
In some embodiments, secondary commutation filter circuit comprises rectifier diode D2, filter capacitor C6, and the anode of rectifier diode D2 is connected with transformer secondary output Motor Winding Same Name of Ends five-port, and the negative electrode of rectifier diode D2 is connected with the positive pole of filter capacitor C6.Thus, the converting electric energy that the magnetic field energy of transformer release converts to can be become direct current.
In some embodiments, USB output circuit comprises USB, connecting line, and first port of USB and the 4th port are connected with the positive pole of secondary commutation filter circuit, negative pole respectively; Connecting line connects the second port and the 3rd port of USB.Thus, the DC power transmission that secondary commutation filter circuit exports can be gone out, charge for mobile phone.
In some embodiments, voltage control circuit comprises control ICU2, voltage sampling the 23 resistance R23, voltage sampling the 29 resistance R29, flashlight direct-current transmission circuit U4; The U2 of control IC is connected with voltage sampling the 23 resistance R23, voltage sampling the 29 resistance R29, flashlight direct-current transmission circuit U4.Thus, by voltage sampling resistor, the output voltage of USB is sampled, the output voltage of control USB output circuit, make it meet the needs of mobile phone charging.
In some embodiments, flashlight direct-current transmission circuit U4 comprises photosignal output circuit U4A and photo-electric signal receiving circuit U4B, photo-electric signal receiving circuit U4B is connected with the PMW modulator U1 of governor circuit, voltage sampling the 23 resistance R23, voltage sampling the 29 resistance R29 sends sampling voltage to control ICU2 to after the sampling of USB output voltage, control ICU2 is sent to photosignal output circuit U4A the sampling voltage after process, photosignal output circuit U4A is that light signal is sent to photo-electric signal receiving circuit U4B the transform electrical signals of sampling voltage, the signal of telecommunication that the light signal received is converted into sampling voltage by photo-electric signal receiving circuit U4B is sent in governor circuit, thus, by photosignal transmission circuit U4, utilize light signal to realize sampling voltage to transmit between voltage control circuit and governor circuit.
Accompanying drawing explanation
Fig. 1 is the utility model charger for mobile phone system block diagram;
Fig. 2 is the circuit theory diagrams of charger for mobile phone shown in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 show schematically show the charger for mobile phone system of a kind of execution mode of the utility model.
As shown in Figure 1, charger for mobile phone comprises input rectifying filter circuit 1, DC-DC conversion circuit 2, governor circuit 3, power circuit 4, transformer 5, secondary commutation filter circuit 6, USB output circuit 7, voltage control circuit 8.Input rectifying filter circuit 1 sends filtering signal to DC-DC conversion circuit 2; DC-DC conversion circuit 2 transmit button figure signal is to transformer 5; Transformer 5 sends variable voltage signal to secondary commutation filter circuit 6 and power circuit 4; Secondary commutation filter circuit 6 sends filtering signal to USB output circuit 7; USB output circuit 7 sends electrical output signal to voltage control circuit 8; Power circuit 4 and voltage control circuit 8 send power supply signal respectively and control signal to governor circuit 3, and power circuit 4 powers to governor circuit 3, and governor circuit 3 controls the switch change-over of DC-DC conversion circuit; Governor circuit sends a control signal to DC-DC conversion circuit.
Fig. 2 show schematically show the circuit theory of the charger for mobile phone charging work shown in Fig. 1.
As shown in Figure 2, input rectifying filter circuit 1 comprises the flat pin N of GB first flat pin L second on shell, insurance F1, X electric capacity CX1, rectifier bridge BD1, the first filter capacitor C1, the second filter capacitor C2, filter inductance L1, and the first flat pin L is that phase line input is connected with one end of insurance F1; The other end of insurance F1 is connected with the first port of rectifier bridge, one end of X electric capacity CX1; Another input of rectifier bridge BD1 is connected with the other end of the flat pin N of GB second and X electric capacity CX1, and wherein, N is zero line; The positive terminal of the filter circuit that the positive terminal of rectifier bridge BD1 forms with the first filter capacitor C1, the second filter capacitor C2, filter inductance L1 is connected, and the negative pole end of rectifier bridge BD1 is connected with the negative pole end of the filter circuit be made up of the first filter capacitor C1, the second filter capacitor C2, filter inductance L1.
In the present embodiment, input rectifying filter circuit is the direct current alternating current of 90-264V being become high-quality, for DC-DC conversion circuit provides the DC power supply of high-quality.
DC-DC conversion circuit 2 comprises the surge absorbing circuit of metal-oxide-semiconductor Q1, resistance R6, electric capacity C9, diode D3 composition, and the source electrode of metal-oxide-semiconductor Q1 is connected with Same Name of Ends second port of primary; The grid of metal-oxide-semiconductor Q1 is connected with governor circuit 3; The drain electrode of metal-oxide-semiconductor Q1 is connected with one end of current sense resistor R21; Between the source electrode that surge absorbing circuit is connected on metal-oxide-semiconductor Q1 and the positive terminal of filter circuit.Metal-oxide-semiconductor Q1 is " switch " working forms, and the switch of Q1 can make primary produce surge current and surge voltage, and surge absorbing circuit is exactly to suppress these surge currents and surge voltage, avoids Q1 to be damaged by surge current and surge voltage.
Governor circuit 3 comprises PWM device U1, current sense resistor R21, high voltage detects the 12 resistance R12, the 13 resistance R13, the 3rd starting resistance R3, the 4th starting resistance R4.One end of 3rd starting resistance R3 is connected with the positive terminal of input rectifying filter circuit 1, and its other end is connected with the 4th starting resistance R4; The other end of the 4th starting resistance R4 is connected with PWM device U1; The current signal that current sense resistor R21 detects is by PWM device U1 process; PWM device U1 also processes voltage control circuit 8 simultaneously and feeds back the voltage signal of coming.3rd starting resistance R3 and the 4th starting resistance R4 when circuit powers on for PWM device U1 provides operating current; after startup; PWM device U1 is powered by power circuit; 3rd starting resistance R3, the 4th starting resistance R4 are inoperative; when high voltage detection the 12 resistance R12, the 13 resistance R13 monitor transformer output abnormality; PWM device U1 closes, thus protection metal-oxide-semiconductor Q1, transformer 5.
Power circuit 4 comprises input, the current rectifying and wave filtering circuit be made up of diode D4 and electric capacity C5, the voltage stabilizing circuit that is made up of the 5th resistance R5, the tenth resistance R10, triode Q2, voltage-stabiliser tube ZD3 and electric capacity C3.Input and transformer feedback Motor Winding Same Name of Ends the 4th port are connected with current rectifying and wave filtering circuit; Current rectifying and wave filtering circuit is connected with voltage stabilizing circuit; Voltage stabilizing circuit is connected with governor circuit.The output voltage of transformer feedback winding is supplied to voltage stabilizing circuit after diode D4 rectification and electric capacity C5 filtering, the key element of voltage stabilizing circuit is triode Q2,5th resistance R5 and the tenth resistance R10 provides bias current to voltage stabilizing circuit, voltage-stabiliser tube ZD3 controls the output voltage of voltage stabilizing circuit, and the output voltage of voltage stabilizing circuit supplies the operating voltage of PWM device U1 as PWM device U1 after electric capacity C3 filtering.
Transformer 5 is made up of armature winding, secondary winding, feedback winding.Armature winding Same Name of Ends second port is connected with DC-DC conversion circuit 2; Armature winding different name end first port is connected with input rectifying filter circuit 1; Secondary winding Same Name of Ends five-port is connected 6 with secondary commutation filter circuit; Feedback Motor Winding Same Name of Ends the 4th port is connected with power circuit 4.Transformer is Energy Transfer device, and electric energy is become magnetic field energy by armature winding, and secondary winding becomes magnetic field energy into electric energy and discharged.
Secondary commutation filter circuit 6 comprises rectifier diode D2, filter capacitor C6.The anode of rectifier diode D2 is connected with transformer secondary output Motor Winding Same Name of Ends five-port, and the negative electrode of rectifier diode D2 is connected with the positive pole of filter capacitor C6.The pulse voltage that transformer secondary output winding discharges is carried out rectification by D2, becomes direct current, and this direct current filtering is become stable direct voltage by filter capacitor C6.
USB output circuit 7 comprises USB, connecting line, and first port of USB and the 4th port are connected with the positive pole of secondary commutation filter circuit 6, negative pole respectively; Connecting line connects the second port and the 3rd port of USB.The steady direct voltage output that USB exports secondary commutation filter circuit, for mobile phone charging use, the second port connecting USB generally adopts copper foil of circuit board to be directly connected with the connecting line of the 3rd port.
In the present embodiment, voltage control circuit 8 comprises U2, voltage sampling the 23 resistance R23, the 29 resistance R29, the flashlight direct-current transmission circuit U4 of control IC, and the U2 of control IC is connected with voltage sampling the 23 resistance R23, the 29 resistance R29, flashlight direct-current transmission circuit U4A.After sampling voltage being sent after 23 resistance R23, the 29 resistance R29 sample the output voltage of USB output circuit 7 the U2 process with control IC, PWM device U1 is passed to through flashlight direct-current transmission circuit U4, PWM device U1 regulates the width of its control impuls in real time, thus realizes the stable of USB output voltage.
Flashlight direct-current transmission circuit U4 comprises photosignal output circuit U4A and photo-electric signal receiving circuit U4B, photo-electric signal receiving circuit U4B is connected with the PMW modulator U1 of governor circuit, voltage sampling the 23 resistance R23, voltage sampling the 29 resistance R29 sends sampling voltage to control ICU2 to after the sampling of USB output voltage, control ICU2 is sent to photosignal output circuit U4A the sampling voltage after process, photosignal output circuit U4A is that light signal is sent to photo-electric signal receiving circuit U4B the transform electrical signals of sampling voltage, the signal of telecommunication that the light signal received is converted into sampling voltage is sent in governor circuit by photo-electric signal receiving circuit U4B
The utility model charger for mobile phone is the charging scheme for GB mobile phone, and cost is low, structure is simple, efficiency is high, has the defencive functions such as overheated, overcurrent, short circuit.
Above-described is execution modes more of the present utility model.For the person of ordinary skill of the art, under the prerequisite not departing from the utility model creation design, the some distortion made and improvement all belong to protection range of the present utility model.
Claims (10)
1. charger for mobile phone comprises input rectifying filter circuit (1), DC-DC conversion circuit (2), governor circuit (3), power circuit (4), transformer (5), secondary commutation filter circuit (6), USB output circuit (7), voltage control circuit (8)
Described input rectifying filter circuit (1) sends filtering signal to DC-DC conversion circuit (2),
Described DC-DC conversion circuit (2) transmit button figure signal to transformer (5),
Described transformer (5) sends variable voltage signal to secondary commutation filter circuit (6) and power circuit (4),
Described secondary commutation filter circuit (6) sends filtering signal to USB output circuit (7),
The transmission of described USB output circuit (7) outputs signal to voltage control circuit (8),
Described power circuit (4) and voltage control circuit (8) send power supply signal respectively and control signal to governor circuit (3),
Described governor circuit (3) sends a control signal to DC-DC conversion circuit (2).
2. charger for mobile phone according to claim 1, is characterized in that,
Described input rectifying filter circuit (1) comprises GB first flat pin L, the flat pin N of GB second on shell, insurance F1, X electric capacity CX1, rectifier bridge BD1, the first filter capacitor C1, the second filter capacitor C2, filter inductance L1,
Described first flat pin L is that phase line input is connected with one end of insurance F1,
The other end of described insurance F1 is connected with the first input end of rectifier bridge BD1, one end of X electric capacity CX1,
Another input of described rectifier bridge BD1 is connected with the other end of the flat pin N of GB second and X electric capacity CX1, and wherein N is zero line,
The positive terminal of the filter circuit that the positive terminal of described rectifier bridge BD1 forms with the first filter capacitor C1, the second filter capacitor C2, filter inductance L1 is connected,
The negative pole end of the filter circuit that the negative pole end of described rectifier bridge BD1 forms with the first filter capacitor C1, the second filter capacitor C2, filter inductance L1 is connected.
3. charger according to claim 1, is characterized in that,
Described transformer (5) is made up of armature winding, secondary winding, feedback winding,
Described armature winding Same Name of Ends second port is connected with DC-DC conversion circuit (2),
Described armature winding different name end first port is connected with input rectifying filter circuit (1),
Described secondary winding Same Name of Ends five-port is connected with secondary commutation filter circuit (6),
Described feedback Motor Winding Same Name of Ends the 4th port is connected with power circuit (4).
4. the charger for mobile phone according to any one of claim 1-3, is characterized in that,
The surge absorbing circuit that described DC-DC conversion circuit (2) comprises metal-oxide-semiconductor Q1 and is made up of resistance R6, electric capacity C9, diode D3,
The source electrode of described metal-oxide-semiconductor Q1 is connected with Same Name of Ends second port of primary;
The grid of described metal-oxide-semiconductor Q1 is connected with governor circuit (3),
The drain electrode of described metal-oxide-semiconductor Q1 is connected with one end of current sense resistor R21,
Between the source electrode that described surge absorbing circuit is connected on metal-oxide-semiconductor Q1 and the positive terminal of filter circuit.
5. charger for mobile phone according to claim 1, is characterized in that,
Described governor circuit (3) comprises PMW modulator U1, current sense resistor R21, high voltage detects the 12 resistance R12, high voltage detects the 13 resistance R13, start the 3rd resistance R3, start the 4th resistance R4,
One end of described startup the 3rd resistance R3 is connected with the positive terminal of input rectifying filter circuit (1), and its other end is connected with startup the 4th resistance R4; The other end starting the 4th resistance R4 is connected with PWM device U1,
The current signal that described current sense resistor R21 detects by PWM device U1 process,
Described PWM device U1 also processes the voltage signal that voltage control circuit (8) feedback is come simultaneously.
6. charger for mobile phone according to claim 1, is characterized in that,
Described power circuit (4) is by input, current rectifying and wave filtering circuit, voltage stabilizing circuit, wherein current rectifying and wave filtering circuit comprises the 4th diode D4 and the 5th capacitor C5, voltage stabilizing circuit comprises the 5th resistance R5, the tenth resistance R10, the second triode Q2, the 3rd voltage-stabiliser tube ZD3, the 3rd electric capacity C3
Described input and transformer feedback Motor Winding Same Name of Ends the 4th port are connected with current rectifying and wave filtering circuit,
Described current rectifying and wave filtering circuit is connected with voltage stabilizing circuit,
Described voltage stabilizing circuit is connected with governor circuit (3).
7. charger for mobile phone according to claim 1, is characterized in that,
Described secondary commutation filter circuit (6) comprises rectifier diode D2, filter capacitor C6,
The anode of described rectifier diode D2 is connected with transformer secondary output Motor Winding Same Name of Ends five-port,
The negative electrode of described rectifier diode D2 is connected with the positive pole of filter capacitor C6.
8. charger for mobile phone according to claim 1, it is characterized in that, described USB output circuit (7) comprises USB, connecting line, and first port of USB and the 4th port are connected with the positive pole of secondary commutation filter circuit (6), negative pole respectively; Connecting line connects the second port and the 3rd port of USB.
9. the charger for mobile phone according to any one of claim 1, is characterized in that,
Described voltage control circuit (8) comprises control ICU2, voltage sampling the 23 resistance R23, voltage sampling the 29 resistance R29, flashlight direct-current transmission circuit U4,
Described control ICU2 connects with voltage sampling the 23 resistance R23, voltage sampling the 29 resistance R29, flashlight direct-current transmission circuit U4.
10. charger for mobile phone according to claim 9, is characterized in that,
Described flashlight direct-current transmission circuit U4 comprises photosignal output circuit U4A and photo-electric signal receiving circuit U4B,
Described photo-electric signal receiving circuit U4B is connected with the PMW modulator U1 of governor circuit (3),
Described voltage sampling the 23 resistance R23, voltage sampling the 29 resistance R29 send sampling voltage to control ICU2 to after the sampling of USB output voltage,
Described control ICU2 is sent to photosignal output circuit U4A the sampling voltage after process,
Described photosignal output circuit U4A is that light signal is sent to photo-electric signal receiving circuit U4B the transform electrical signals of sampling voltage,
The signal of telecommunication that the light signal received is converted into sampling voltage by described photo-electric signal receiving circuit U4B is sent in governor circuit (3).
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| CN201520609833.8U CN204858705U (en) | 2015-08-13 | 2015-08-13 | Mobile phone charger |
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| CN201520609833.8U CN204858705U (en) | 2015-08-13 | 2015-08-13 | Mobile phone charger |
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