CN201319514Y - Charging circuit of absorbing electromagnetic wave and electronic device thereof - Google Patents
Charging circuit of absorbing electromagnetic wave and electronic device thereof Download PDFInfo
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- CN201319514Y CN201319514Y CNU2008202131801U CN200820213180U CN201319514Y CN 201319514 Y CN201319514 Y CN 201319514Y CN U2008202131801 U CNU2008202131801 U CN U2008202131801U CN 200820213180 U CN200820213180 U CN 200820213180U CN 201319514 Y CN201319514 Y CN 201319514Y
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Abstract
The utility model discloses a charging circuit of absorbing electromagnetic wave, comprising a voltage-controlled resonator, a coupling output circuit, a rectifier and filter circuit and a feedback circuit, wherein the voltage-controlled resonator is used for absorbing electromagnetic wave, generating resonance and outputting resonance voltage; the coupling output circuit is connected with the voltage-controlled resonator and used for the coupling output of resonance voltage; the rectifier and filter circuit are connected with the coupling output circuit and used for rectifying and filtering treatment; and the feedback circuit is connected between the output end of the rectifier and filter circuit and the input end of the voltage-controlled resonator. The feedback circuit provides automatic gain control to enable the electromagnetic wave frequency of the resonance frequency tracking and receiving of the voltage-controlled resonator to change. The utility model further discloses an electronic device with the charging circuit of absorbing electromagnetic wave. The utility model absorbs the useless electromagnetic waves in spaces and converts the electromagnetic waves into direct current voltage to provide the direct current voltage for the electronic device, so that the purposes of effectively utilizing energy sources and saving the energy are achieved; the charging circuit has the advantage of simple structure, and is especially suitable to be applied to electronic devices with low power consumption.
Description
Technical field
The utility model relates to a kind of charging circuit, and relating in particular to a kind of electromagnetic wave conversion process with absorption is the charging circuit of electric energy, and the electronic equipment with this charging circuit.
Background technology
Energy problem is one of significant problem of facing of the 21 century mankind.Because there is lack of uniformity in the energy in distribution, exploitation, production and consumption, in addition nearly half a century the whole world energy consumption also increase substantially with the raising of The development in society and economy and people's living standard.After particularly oil becomes in the world main energy sources, certain energy occurred in certain time of certain areas and do not satisfied the development and national economy needs, thereby so-called " energy crisis ", i.e. energy problem have occurred.
And make a general survey of various electronic equipments in our daily life, and it all directly or indirectly obtains electric energy by electrical network and reaches normal operation, and its power consumption is bigger.If can effectively reduce the power consumption of various electronic equipments, also be one of effective way of slowing down energy crisis.
Simultaneously, be flooded with the electromagnetic wave of each frequency range in the space that we live, most of electromagnetic wave is useless electromagnetic wave.If can make full use of electromagnetic wave useless in the space, effectively convert electromagnetic wave to direct voltage and offer electronic equipment, then will be to utilize the energy and energy-conservation huge advance made.
Therefore,, solve the absorption unwanted electromagnetic wave and come, become one of difficult problem of current urgent need solution for electronic equipment provides direct voltage how in line with to the low power dissipation design of electronic equipment and the design concept of effective use of energy sources.
The utility model content
The purpose of this utility model is that a kind of electromagnetic wave conversion process with absorption of proposition is the charging circuit of electric energy, and electronic equipment with this charging circuit, to be that electronic equipment provides direct voltage, reach effective use of energy sources and purpose of energy saving by absorbing electromagnetic wave.
For solving technical problem of the present utility model, the utility model discloses the electromagnetic charging circuit of a kind of absorption, and a kind of electronic equipment with the electromagnetic charging circuit of one or more absorptions.Wherein, charging circuit comprises: absorb electromagnetic wave and produce resonance, the voltage-controlled resonator of export resonance voltage; Voltage-controlled resonator links to each other and is used for the coupling output circuit of resonance potential coupling output is used for the current rectifying and wave filtering circuit that rectifying and wave-filtering is handled with linking to each other with the coupling output circuit; Be connected the feedback circuit between the input of the output of current rectifying and wave filtering circuit and voltage-controlled resonator, the resonance frequency that this feedback circuit provides automatic gain control to make voltage-controlled resonator is followed the tracks of the wave frequency that receives and is changed.
More excellent, described voltage-controlled resonator comprises: absorb electromagnetic antenna; With antenna and connect and variable capacitance diode that capacitance is changed by the feedback voltage control of feedback circuit.
More excellent, described feedback circuit comprises: direct current amplifier; Be serially connected in and be used to variable capacitance diode that straight partially voltage is provided between the output of direct current amplifier and the variable capacitance diode, isolate the biasing resistor that exchanges simultaneously.
More excellent, described feedback circuit also comprises: be serially connected between the input and output of direct current amplifier, be used to regulate two divider resistances of direct current amplifier multiplication factor.
More excellent, described coupling output circuit comprises: be serially connected in the direct capacitance of antenna and variable capacitance diode; Be serially connected in the coupling capacitance between antenna and the current rectifying and wave filtering circuit.
More excellent, described current rectifying and wave filtering circuit comprises: filter capacitor; Be serially connected in rectifier diode between coupling capacitance and the filter capacitor.
Compared with prior art, the utlity model has following beneficial effect:
The utility model absorbs the useless electromagnetic wave in space and converts direct voltage to and offers electronic equipment, reaches effective use of energy sources and purpose of energy saving; And charging circuit has advantage of simple structure, especially is fit to be applied in the electronic equipment of low-power consumption.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the circuit diagram of a preferred embodiment of the utility model;
Fig. 3 is the impedance variation schematic diagram of resonant circuit;
Fig. 4 is the frequency-voltage relationship schematic diagram of Frequency point;
Fig. 5 is the circuit diagram of an application example of the utility model.
Embodiment
The utility model is to propose a kind of the electromagnetic wave that absorbs to be converted to electric energy, and output voltage provides the charging circuit of operating voltage for other equipment, with energy savings.
As shown in Figure 1, charging circuit of the present utility model comprises: voltage-controlled resonator 10, coupling output circuit 11, current rectifying and wave filtering circuit 12 and feedback circuit 13.Absorbed electromagnetic wave and be converted to voltage by voltage-controlled resonator 10, export through coupling output circuit 11 couplings of stopping direct current, and make rectification and Filtering Processing by current rectifying and wave filtering circuit 12, output voltage provides voltage for other equipment; And feedback circuit 13 is connected between current rectifying and wave filtering circuit 12 and the voltage-controlled resonator 10, and the resonance point frequency-tracking wave frequency that provides automatic gain control (AGC, Automatic Gain Control) to make equivalent resonant circuit in the charging circuit changes.
In conjunction with shown in Figure 2, voltage-controlled resonator 10 comprises the electromagnetic antenna L1 of reception and the variable capacitance diode Cd that capacitance is controlled by feedback circuit 13; Coupling output circuit 11 comprises capacitance C1 and coupling capacitance C2; Current rectifying and wave filtering circuit 12 comprises rectifier diode D1 and filter capacitor C3; Feedback circuit 13 comprises: direct current amplifier 101, and the resistance R 3 and the R4 that adjust direct current amplifier 101 multiplication factors; Provide bias voltage by biasing resistor R1 for variable capacitance diode Cd, and biasing resistor R1 also has the effect of the alternating voltage of isolated DC amplifier 101 output, make 101 pairs in direct current amplifier can not influence resonant tank; And the voltage of process rectifier diode D1 is through the input of resistance R 2 coupling input charge members 102.
Variable capacitance diode Cd is the semiconductor diode that a kind of principle of utilizing semiconductor PN electric capacity to change with applied reverse bias voltage is made.The PN junction of diode all has junction capacitance, when adding reverse voltage, and the barrier layer thickening, junction capacitance reduces, so change the junction capacitance size that the size of reverse voltage can change PN junction, variable capacitance diode Cd is equal to variable capacitance.Junction capacitance generally has only several pico farads, one, 200 pico farads at the most, so variable capacitance diode all is used for high-frequency circuit, variable capacitance diode Cd belongs to reverse-biased diode, change the reverse biased on its PN junction, can change the PN junction capacitance: reverse biased is high more, and junction capacitance is then few more, and the relation between reverse biased and the junction capacitance is non-linear.
Wherein, form series resonant tank by antenna L1, capacitance C1 and variable capacitance diode Cd, the capacitance C1 total capacitance of connecting with variable capacitance diode Cd is:
Cl*Cd/(C1+Cd)＝Cd/(1+Cd/C1)；
Because the capacitance of capacitance C1 is much larger than variable capacitance diode Cd, therefore, Cd/C1 ≈ 0; That is: the capacitance C1 total capacitance of connecting with variable capacitance diode Cd is variable capacitance diode Cd.That is to say that equivalent capacity is variable capacitance diode Cd in the series resonant tank, equivalent inductance is antenna L1.
In conjunction with shown in Figure 3, its abscissa is represented resonance angular frequency ω, and ordinate X represents the reactance value of resonant circuit.For resonant circuit characteristics are arranged all, capacitive reactance equals induction reactance, and it is resistive that circuit is: i.e. resonance angular frequency ω=ω
0The time, ω is just arranged
0L=1/ ω
0C, and resonance frequency f
0For:
Wherein equivalent inductance L is antenna L1, and equivalent capacity C is variable capacitance diode Cd, so LC is known.
In addition, the quality factor Q=ω L/R of resonant circuit (wherein R is the equivalent resistance of series resonant tank).Have following characteristic for series resonant circuit:
1, the impedance of resonant circuit is minimum during resonance, and be pure resistive, and the impedance at the resonance place reaches minimum and is D.C. resistance R in the loop; When the electromagnetic wave signal frequency that receives is greater than or less than f
0The time, the impedance of resonant circuit is all greater than f
0The time impedance, the electromagnetic wave signal frequency more is the off-resonance frequency f
0, the impedance of resonant circuit is bigger.
2, according to LC series resonance theory: the resonance potential that certain resonance frequency is corresponding certain, therefore, voltage during resonance on the antenna L1 equals the voltage on the variable capacitance diode Cd, and equal Q times (Q is a quality factor) of signal voltage, so, the voltage maximum when series resonance takes place on the antenna L1.
Therefore, in order to guarantee the natural resonance frequency f of this resonant circuit
0The wave frequency of receiving with the external world equates, changes so the resonance frequency f0 that feedback circuit 13 provides automatic gain control to make equivalent resonant circuit in the charging circuit follows the tracks of the wave frequency that receives.
That is: so after the direct voltage on the filter capacitor C3 is made the direct voltage processing and amplifying through direct current amplifier 101, be added on the biasing resistor R1, make the change in voltage on the variable capacitance diode Cd and make electric capacitance change, make natural resonance frequency f
0Following the tracks of the extraneous wave frequency of being received changes.
Increase when filter capacitor C3 goes up voltage, the output voltage after direct current amplifier 101 amplifies becomes big, the voltage on the variable capacitance diode Cd is increased, thereby the capacitance of variable capacitance diode Cd reduces, from top formula (1) f as can be known
0Become big; Voltage on filter capacitor C3 reduces, and direct current amplifier 101 amplifies the back output voltages and diminishes, and voltage on the variable capacitance diode Cd is reduced and makes its electric capacity quantitative change big, from top formula (1) f as can be known
0Diminish.Therefore, the resonance frequency f0 that feedback circuit 13 provides automatic gain control to make equivalent resonant circuit in the charging circuit follows the tracks of the wave frequency that receives and changes, and makes resonant circuit at f
1And f
2Be in f
0Shi Weiyi point of safes, as shown in Figure 4.
In addition, reach variable capacitance diode Cd than high working voltage, be added in driving voltage VCC on the direct current amplifier 101 and use the inner higher voltage of electronic installation to provide as far as possible.Such as, when present embodiment was applied in the mobile phone, driving voltage VCC can use the booster voltage backlight in the mobile phone.
Therefore, the voltage on the variable capacitance diode Cd is through capacitance C1 and coupling capacitance C2, and rectifier diode D1 and filter capacitor C3, obtains direct voltage; By resistance R 2 charge member 102 is imported in the direct voltage coupling.Wherein, charge member 102 is power consumption components and parts or the charging components and parts in the electronic equipment, such as rechargeable battery.
In concrete practical application, consider that the electromagnetic power in space is limited, therefore can adopt a plurality of antennas to absorb the electromagnetic wave of a plurality of Frequency points simultaneously by frequency-division section.As shown in Figure 5, when being applied in the charging mobile phone battery circuit, in the charging circuit 1,2 and 3, antenna L11, L12 and L13 are operated in different frequency range respectively, to absorb the electromagnetic wave of different frequency range, reach each frequency range electromagnetic wave energy of comprehensive utilization and come the purpose of charging for the rechargeable battery in the mobile phone 103.Wherein, antenna L11, L12 can be connected the casing of design at mobile phone, places such as bonnet with L13.
Though the electromagnetic wave power that the charging circuit that the utility model provides absorbs is less, can only replenish as a kind of of charging at present electronic equipment, but along with the development of antenna technology and the reduction of electronic equipment power consumption, and absorption of electromagnetic wave is continual, some day many electronic equipments (such as mobile phone) will be the same through IC-card commonly used with us, need not extraneous power supply can keep its work.
To sum up, the utility model is the resonant circuit that adopts flexible diode and absorb the antenna formation of specific wavelength, and the resonance frequency f0 that adopts feedback circuit to provide automatic gain control to make equivalent resonant circuit in the charging circuit follows the tracks of the wave frequency that receives and changes, and makes resonant circuit at f
1And f
2Be in f
0Shi Weiyi point of safes guarantees the natural resonance frequency f of this resonant circuit
0The wave frequency of receiving with the external world equates, makes the maximum resonance potential that belongs to that resonant circuit can be stable come to provide charging for the charge member in the electronic equipment.Therefore, the utility model reaches effective use of energy sources and purpose of energy saving; And charging circuit has advantage of simple structure, especially is fit to be applied in the electronic equipment of low-power consumption.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1, the electromagnetic charging circuit of a kind of absorption is characterized in that, comprising:
Absorb electromagnetic wave and produce resonance, the voltage-controlled resonator (10) of export resonance voltage;
The coupling output circuit (11) that is used for the resonance potential coupling is exported that links to each other with voltage-controlled resonator (10) is used for the current rectifying and wave filtering circuit (12) that rectifying and wave-filtering is handled with linking to each other with coupling output circuit (11);
Be connected the feedback circuit (13) between the input of the output of current rectifying and wave filtering circuit (12) and voltage-controlled resonator (10), the resonance frequency that this feedback circuit (13) provides automatic gain control to make voltage-controlled resonator (10) is followed the tracks of the wave frequency that receives and is changed.
2, the electromagnetic charging circuit of absorption according to claim 1 is characterized in that, described voltage-controlled resonator (10) comprising: absorb electromagnetic antenna (L1); With antenna (L1) and connect and variable capacitance diode (Cd) that capacitance is changed by the feedback voltage control of feedback circuit (13).
3, the electromagnetic charging circuit of absorption according to claim 1 and 2 is characterized in that, described feedback circuit (13) comprising: direct current amplifier (101); Be serially connected in the output of direct current amplifier (101) and the variable capacitance diode (Cd) that is used between the variable capacitance diode (Cd) straight partially voltage is provided, isolate the biasing resistor (R1) that exchanges simultaneously.
4, the electromagnetic charging circuit of absorption according to claim 3, it is characterized in that, described feedback circuit (13) also comprises: be serially connected between the input and output of direct current amplifier (101), be used to regulate two divider resistances (R3 and R4) of direct current amplifier (101) multiplication factor.
5, the electromagnetic charging circuit of absorption according to claim 1 is characterized in that, described coupling output circuit (11) comprising: be serially connected in directly capacitance (C1) of antenna (L1) and variable capacitance diode (Cd); Be serially connected in the coupling capacitance (C2) between antenna (L1) and the current rectifying and wave filtering circuit (12).
6, absorb electromagnetic charging circuit according to claim 1 or 5, it is characterized in that, described current rectifying and wave filtering circuit (12) comprising: filter capacitor (C3); Be serially connected in rectifier diode (D1) between coupling capacitance (C2) and the filter capacitor (C3).
7, a kind of electronic equipment is characterized in that, comprises the electromagnetic charging circuit of one or more absorptions, and this charging circuit comprises:
Absorb electromagnetic wave and produce resonance, the voltage-controlled resonator (10) of export resonance voltage;
The coupling output circuit (11) that is used for the resonance potential coupling is exported that links to each other with voltage-controlled resonator (10) is used for the current rectifying and wave filtering circuit (12) that rectifying and wave-filtering is handled with linking to each other with coupling output circuit (11);
Be connected the feedback circuit (13) between the input of the output of current rectifying and wave filtering circuit (12) and voltage-controlled resonator (10), the resonance frequency that this feedback circuit (13) provides automatic gain control to make voltage-controlled resonator (10) is followed the tracks of the wave frequency that receives and is changed.
8, electronic equipment according to claim 7 is characterized in that, described voltage-controlled resonator (10) comprising: absorb electromagnetic antenna (L1); With antenna (L1) and connect and variable capacitance diode (Cd) that capacitance is changed by the feedback voltage control of feedback circuit (13).
According to claim 7 or 8 described electronic equipments, it is characterized in that 9, described feedback circuit (13) comprising: direct current amplifier (101); Be serially connected in the output of direct current amplifier (101) and the variable capacitance diode (Cd) that is used between the variable capacitance diode (Cd) straight partially voltage is provided, isolate the biasing resistor (R1) that exchanges simultaneously.
10, electronic equipment according to claim 7 is characterized in that, described coupling output circuit (11) comprising: be serially connected in directly capacitance (C1) of antenna (L1) and variable capacitance diode (Cd); Be serially connected in the coupling capacitance (C2) between antenna (L1) and the current rectifying and wave filtering circuit (12);
Described current rectifying and wave filtering circuit (12) comprising: filter capacitor (C3); Be serially connected in rectifier diode (D1) between coupling capacitance (C2) and the filter capacitor (C3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202131801U CN201319514Y (en) | 2008-11-07 | 2008-11-07 | Charging circuit of absorbing electromagnetic wave and electronic device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202131801U CN201319514Y (en) | 2008-11-07 | 2008-11-07 | Charging circuit of absorbing electromagnetic wave and electronic device thereof |
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| Publication Number | Publication Date |
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| CN201319514Y true CN201319514Y (en) | 2009-09-30 |
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|---|---|---|---|
| CNU2008202131801U Expired - Fee Related CN201319514Y (en) | 2008-11-07 | 2008-11-07 | Charging circuit of absorbing electromagnetic wave and electronic device thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101919708A (en) * | 2010-07-05 | 2010-12-22 | 深圳市开立科技有限公司 | Dual wireless ultrasonic probe and biological ultrasonic echo signal acquisition system |
| CN101989769A (en) * | 2010-11-02 | 2011-03-23 | 陆敬仁 | Method for recycling energy of electromagnetic waves |
| CN102195329A (en) * | 2011-05-18 | 2011-09-21 | 陆敬仁 | Mobile phone self-charging device without any external power supply |
| CN103236567A (en) * | 2013-04-18 | 2013-08-07 | 东莞宇龙通信科技有限公司 | Wireless charging method, device and system |
| CN103479028A (en) * | 2013-10-12 | 2014-01-01 | 王赓 | Anti-falling charging mobile phone cover |
| CN103488099A (en) * | 2012-06-14 | 2014-01-01 | 珠海格力电器股份有限公司 | Electric-appliance standby control device and method |
-
2008
- 2008-11-07 CN CNU2008202131801U patent/CN201319514Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101919708A (en) * | 2010-07-05 | 2010-12-22 | 深圳市开立科技有限公司 | Dual wireless ultrasonic probe and biological ultrasonic echo signal acquisition system |
| CN101989769A (en) * | 2010-11-02 | 2011-03-23 | 陆敬仁 | Method for recycling energy of electromagnetic waves |
| CN102195329A (en) * | 2011-05-18 | 2011-09-21 | 陆敬仁 | Mobile phone self-charging device without any external power supply |
| CN103488099A (en) * | 2012-06-14 | 2014-01-01 | 珠海格力电器股份有限公司 | Electric-appliance standby control device and method |
| CN103488099B (en) * | 2012-06-14 | 2017-02-08 | 珠海格力电器股份有限公司 | Electric-appliance standby control device and method |
| CN103236567A (en) * | 2013-04-18 | 2013-08-07 | 东莞宇龙通信科技有限公司 | Wireless charging method, device and system |
| CN103479028A (en) * | 2013-10-12 | 2014-01-01 | 王赓 | Anti-falling charging mobile phone cover |
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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: 20090930 Termination date: 20151107 |
|
| EXPY | Termination of patent right or utility model |