CN103178807A - Tuned circuit and near-field payment equipment - Google Patents
Tuned circuit and near-field payment equipment Download PDFInfo
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- CN103178807A CN103178807A CN2013100663607A CN201310066360A CN103178807A CN 103178807 A CN103178807 A CN 103178807A CN 2013100663607 A CN2013100663607 A CN 2013100663607A CN 201310066360 A CN201310066360 A CN 201310066360A CN 103178807 A CN103178807 A CN 103178807A
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Abstract
The invention belongs to the field of oscillation tuning and provides a tuned circuit and near-field payment equipment. By adopting the tuned circuit comprising multiple tuning modules, according to different switch choosing operations, tuning current is processed by one or more of the multiple tuning modules and transmitted to a resonance circuit, and resonance frequency of the tuning circuit is adjusted by cooperation of the processed turning current with a capacitor C1 and an inductor L1, so that the objective of reduction of tuning current leakage is achieved, the number of capacitors needed by the whole tuned circuit is decreased, the circuit size is further reduced, and circuit cost is lowered.
Description
Technical field
The invention belongs to the tuning field that vibrates, relate in particular to a kind of tuning circuit and near field payment devices.
Background technology
Tuning circuit, it is used for carrying out tuning, by before frequency acquisition, the size of electric capacity, inductance or resistance in the access oscillating circuit being regulated to reach tuning purpose, makes vibration reach better effects.Resonant circuit in tuning circuit can be single-tunded circuit, can be also the double tuned circuit that is coupled by two loops.
Resonant circuit in the tuning circuit that prior art provides comprises capacitor C s1, capacitor C p and inductance L, and wherein, capacitor C s1 one end passes through capacitor C T1 or capacitor C T2 ground connection (as shown in Figure 1) when switch SW 1 or switch SW 2 closure.When inductance L changes due to external influence, by control switch SW1 and SW2, capacitor C T1 and capacitor C T2 ground connection can be increased the resonant capacitance value to adapt to the change of resonance frequency.Yet, because the input current of resonant circuit is fixed, and the electric current by inductance L is to obtain maximum working voltage (maximum working voltage is namely the key whether the inductance effect reaches optimum state) in order to ensure inductance L under correct condition of resonance, when being arranged, the part electric current releases to greatly the time by capacitor C s1, electric current by inductance L can reduce, thereby make the voltage of resonant circuit not in normal range (NR), cause the resonance potential at inductance L two ends inadequate, even cisco unity malfunction or unstable working condition.
Moreover, as shown in Figure 1, because signal input module TX1 is connected with capacitor C s1, the effect of capacitor C s1 is that tuning circuit is carried out stopping direct current, transmitting energy and assists to determine resonance frequency, so tuning circuit has 3 kinds of tuning manners, namely introduce respectively capacitor C T1, capacitor C T2 or capacitor C T1 and capacitor C T2 place in circuit can be realized, so need to introduce capacitor C T1, capacitor C T2, capacitor C s1 and capacitor C p totally four electric capacity, make the volume of whole tuning circuit increase and the cost increase.Therefore, the tuning circuit that prior art provides can't satisfy specified demand because tuning current causes the output voltage of resonant circuit with leaking to, and has the large and high problem of cost of circuit volume.
Summary of the invention
The purpose of this invention is to provide a kind of tuning circuit, the tuning circuit that being intended to solve prior art provides can't satisfy specified demand because tuning current causes the output voltage of resonant circuit with leaking to, and has the large and high problem of cost of circuit volume.
The present invention is achieved in that
A kind of tuning circuit, comprise signal input module and resonant circuit, described signal input module is used for to described resonant circuit output tuning current, and described resonant circuit comprises capacitor C 1 and inductance L 1, and the first end of the first end of described capacitor C 1 and described inductance L 1 is connected to ground altogether; Described tuning circuit also comprises a plurality of tuner modules, and the quantity of described a plurality of tuner modules is to be not less than 2 positive integer;
The input of each tuner module in described a plurality of tuner module connects the output of described signal input module, and the output of each tuner module in described a plurality of tuner modules connects the second end of described capacitor C 1 and the second end of described inductance L 1 simultaneously;
Any one or the closed conducting by default of a plurality of tuner module in described a plurality of tuner module, select operation according to switch, one or more tuner modules in described a plurality of tuner module transfer to described resonant circuit after described tuning current is processed, and match with described capacitor C 1 and described inductance L 1 resonance frequency of described resonant circuit is adjusted.
The present invention also provides a kind of near field payment devices that comprises above-mentioned tuning circuit.
the present invention comprises the tuning circuit of a plurality of tuner modules by employing, select operation according to different switches, transfer to resonant circuit after by the one or more tuner modules in described a plurality of tuner modules, tuning current being processed, and match with described capacitor C 1 and described inductance L 1 resonance frequency of described resonant circuit is adjusted, reach and reduce the purpose that tuning current leaks, reduce simultaneously the quantity of the required electric capacity of whole tuning circuit, further reduced the circuit volume, and reduced circuit cost, thereby the tuning circuit that having solved prior art provides can't satisfy specified demand because tuning current causes the output voltage of resonant circuit with leaking to, and there is the large and high problem of cost of circuit volume.
The present invention also provides another kind of tuning circuit, comprise first signal input module, secondary signal input module and resonant circuit, to described resonant circuit output the first tuning current and second tune electric current, described resonant circuit comprises capacitor C 11 and inductance L 11 respectively for described first signal input module and described secondary signal input module; Described tuning circuit also comprises a plurality of the first tuner modules and a plurality of second tune module, and described a plurality of the first tuner modules and described a plurality of second tune module number are and are not less than 2 positive integer;
The input of described a plurality of the first tuner modules all connects the output of described first signal input module, the output of described a plurality of the first tuner modules all is connected to the first end of described inductance L 11 altogether with the first end of described capacitor C 11, the input of described a plurality of second tune modules all connects the output of described secondary signal input module, and the output of described a plurality of second tune modules all is connected to the second end of described inductance L 11 altogether with the second end of described capacitor C 11;
any one in any one in described a plurality of the first tuner module or a plurality of the first tuner module and/or described a plurality of second tune module or the closed conducting by default of a plurality of second tune module, select operation according to switch, one or more the first tuner modules in described a plurality of the first tuner module transfer to described resonant circuit after described the first tuning current is processed, and match with described capacitor C 11 and described inductance L 11 resonance frequency of described resonant circuit is adjusted, one or more second tune modules in described a plurality of second tune module transfer to described resonant circuit after described second tune electric current is processed, and match with described capacitor C 11 and described inductance L 11 resonance frequency of described resonant circuit is adjusted.
The present invention also provides the another kind of near field payment devices that comprises above-mentioned tuning circuit.
the present invention also comprises the tuning circuit of a plurality of the first tuner modules and a plurality of second tune modules by employing, select operation according to different switches, transfer to described resonant circuit after by one or more the first tuner modules in described a plurality of the first tuner modules, described the first tuning current being processed, and match with described capacitor C 11 and described inductance L 11 resonance frequency of described resonant circuit is adjusted, and the one or more second tune modules in described a plurality of second tune module transfer to described resonant circuit after described second tune electric current is processed, and match with described capacitor C 11 and described inductance L 11 resonance frequency of described resonant circuit is adjusted, reach and reduce the purpose that tuning current leaks, reduce simultaneously the quantity of the required electric capacity of whole tuning circuit, reduced the circuit volume, and reduced circuit cost, thereby the tuning circuit that having solved prior art provides can't satisfy specified demand because tuning current causes the output voltage of resonant circuit with leaking to, and there is the large and high problem of cost of circuit volume.
Description of drawings
Fig. 1 is the structure chart of the tuning circuit that provides of prior art;
Fig. 2 is the structure chart of the tuning circuit that provides of first embodiment of the invention;
Fig. 3 is the structure chart of the tuning circuit that provides of first embodiment of the invention;
Fig. 4 is the exemplary circuit structure chart of the tuning circuit that provides of first embodiment of the invention;
Fig. 5 is the exemplary circuit structure chart of the tuning circuit that provides of first embodiment of the invention;
Fig. 6 is the structure chart of the tuning circuit that provides of second embodiment of the invention;
Fig. 7 is the structure chart of the tuning circuit that provides of second embodiment of the invention;
Fig. 8 is the exemplary circuit structure chart of the tuning circuit that provides of second embodiment of the invention;
Fig. 9 is the exemplary circuit structure chart of the tuning circuit that provides of second embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The tuning circuit that the embodiment of the present invention provides can reduce tuning current to the leakage of the earth, reduces simultaneously the quantity of the required electric capacity of whole tuning circuit, has reduced the circuit volume, and has reduced circuit cost.
Be elaborated below in conjunction with the specific implementation of specific embodiment to above-mentioned tuning circuit:
Embodiment one:
Fig. 2 shows the structure of the tuning circuit that first embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
Tuning circuit comprises signal input module 100 and resonant circuit 200, and signal input module 100 is used for to resonant circuit 200 output tuning currents, and resonant circuit 200 comprises capacitor C 1 and inductance L 1, and the first end of the first end of capacitor C 1 and inductance L 1 is connected to ground altogether.
Tuning circuit also comprises a plurality of tuner modules 300, and the quantity of a plurality of tuner modules 300 is to be not less than 2 positive integer.
The input of each tuner module in described a plurality of tuner module 300 connects the output of signal input module 100, and the output of each tuner module in a plurality of tuner modules 300 connects the second end of capacitor C 1 and the second end of inductance L 1 simultaneously;
Any one or the closed conducting by default of a plurality of tuner module in a plurality of tuner modules 300, select operation according to switch, one or more tuner modules in a plurality of tuner modules 300 transfer to resonant circuit 200 after described tuning current is processed, and match with capacitor C 1 and inductance L 1 resonance frequency of resonant circuit 200 is adjusted.Aforementioned tuner module to the processing of tuning current can be for DC-isolation, filtering, frequency stabilization, high frequency weakening, coupling, decoupling, step-down current limliting, frequency division, go one or more the combination such as side, phase shift, Bootstrap.
In order to enlarge the tuning range of tuning circuit, as shown in Figure 3, tuning circuit also can comprise the auxiliary tuning module further, this auxiliary tuning module comprises inductor auxiliary tuning module 500 and/or capacitance kind auxiliary tuning module 600, the quantity of inductor auxiliary tuning module 500 and capacitance kind auxiliary tuning module 600 all can be one or more, and the quantity of the inductor auxiliary tuning module 500 in a plurality of auxiliary tuning modules and the quantity of capacitance kind auxiliary tuning module 600 can be respectively any positive integer;
The first end of inductor auxiliary tuning module 500 connects the second end of capacitor C 1, the first end of capacitance kind auxiliary tuning module 600 also connects the second end of capacitor C 1, and the second end of the second end of inductor auxiliary tuning module 500 and capacitance kind auxiliary tuning module 600, the first end of capacitor C 1 and the first end of inductance L 1 are connected to ground altogether.
In addition, in order to improve the performance of tuning circuit, make the Q value (being the ratio of the induction reactance loss resistance equivalent with it that present when working under the alternating voltage of a certain frequency of inductance L 1) of tuning circuit adjustable, and then the amplitude level of realizing output signal is adjustable, as shown in Figure 3, tuning circuit can comprise further that also resistance R, resistance R are connected between the second end of the second end of capacitor C 1 and inductance L 1.Resistance R can be to be made of by series, parallel or connection in series-parallel form a plurality of resistance, can be also the adjustable resistance R of resistance, and especially, the resistance R that resistance is adjustable can also be to be substituted by the different resistance that a plurality of switch arrays are controlled.
Fig. 4 shows the exemplary circuit structure of the tuning circuit corresponding with Fig. 2 that first embodiment of the invention provides, and the equal value of the quantity of tuner module 300 is 2, for convenience of explanation, only shows part related to the present invention, and details are as follows:
Each tuner module in a plurality of tuner modules 300 comprises switch S 1 and capacitor C s1, the first end of switch S 1 is the input of tuner module 300, the second end of switch S 1 connects the first end of capacitor C s1, and the second end of capacitor C s1 is the output of tuner module 300; The capacitance of the capacitor C s1 that each tuner module is included can be identical or different, specifically can do different selections to the value of capacitance according to practical application request.
In the present embodiment, switch S 1 can be that mechanical switch, semiconductor switch or other possess the components and parts of switching characteristic; Capacitor C 1, capacitor C s1 and inductance L 1 can be to be made of by series, parallel or connection in series-parallel form a plurality of components and parts of the same type, it can be respectively also the adjustable inductance L 1 of the adjustable capacitor C of capacitance 1, capacitor C s1 and inductance value, the capacitor C 1 that capacitance is adjustable and capacitor C s1 can also adopt variable capacitance diode in other embodiments of the invention or the different electric capacity controlled by a plurality of switch arrays substitute, and the inductance L 1 that inductance value is adjustable can also be substituted by the different induction that a plurality of switch arrays are controlled.
The tuning circuit that the present embodiment provides can be easily to the resistance of resistance R, the inductance value of capacitor C 1, capacitor C s1 and inductance L 1 is adjusted, make resonant circuit 200 in desired working frequency range, resonance occur, and then improve the performance of resonant circuit 200.
Fig. 5 shows the exemplary circuit structure of the tuning circuit corresponding with Fig. 3 that first embodiment of the invention provides, and the equal value of quantity of inductor auxiliary tuning module 500 and capacitance kind auxiliary tuning module 600 is 1, for convenience of explanation, only show part related to the present invention, details are as follows:
Inductor auxiliary tuning module 500 comprises switch S 3 and inductance L 2, the first end of switch S 3 is the first end of inductor auxiliary tuning module 500, the second end of switch S 3 connects the first end of inductance L 2, and the second end of inductance L 2 is the second end of inductor auxiliary tuning module 500; When the quantity of inductor auxiliary tuning module 500 is a plurality of (namely being no less than 2), the inductance value of the inductance L 2 that each inductor auxiliary tuning module 500 is included can be identical or different, specifically can do different selections to the value of inductance value according to practical application request.
Capacitance kind auxiliary tuning module 600 comprises switch S 4 and capacitor C 2, the first end of switch S 4 is the first end of capacitance kind auxiliary tuning module 600, the second end of switch S 4 connects the first end of capacitor C 2, and the second end of capacitor C 2 is the second end of capacitance kind auxiliary tuning module 600; When the quantity of capacitance kind auxiliary tuning module 500 is a plurality of (namely being no less than 2), the capacitance of the capacitor C 2 that each capacitance kind auxiliary tuning module 600 is included can be identical or different, specifically can do different selections to the value of capacitance according to practical application request.
In the present embodiment, switch S 3 and switch S 4 can be that mechanical switch, semiconductor switch or other possess the components and parts of switching characteristic.
Below in conjunction with operation principle, Fig. 4 and Fig. 5, the above-mentioned tuning circuit that the present embodiment provides is described further:
by default, the closed conducting of switch S 1 in one of them tuner module of two tuner modules 300, the capacitor C s1 in this tuner module accesses resonant circuit 200, so resonant circuit 200 can enter operating state and produce resonance signal when signal input module 100 begins to export tuning current, if the equal closed conducting of switch S 1 in two tuner modules 300, the capacitor C s1 in two tuner modules 300 transfers to resonant circuit 200 after the tuning circuit of signal input module 100 outputs is processed, and the capacitor C s1 in two tuner modules 300, capacitor C 1 and inductance L 1 match to adjust resonance frequency, and corresponding export resonance signal, because the capacitor C s1 in two tuner modules 300 directly is not connected with the earth, so reduced the leakage of tuning current, make the resonance potential at inductance L two ends satisfy corresponding requirement, and then improved the stability of resonant circuit.In addition, when switch S 3 and/or switch S 4 closed conducting, inductance L 2 or capacitor C 2 access resonant circuits 200 can play the effect of the tuning range that enlarges whole tuning circuit.Aforementioned tuner module to the processing of tuning current can be for DC-isolation, filtering, frequency stabilization, high frequency weakening, coupling, decoupling, step-down current limliting, frequency division, go one or more the combination such as side, phase shift, Bootstrap.
The present embodiment also provides a kind of near field payment devices that comprises above-mentioned tuning circuit, and this near field payment devices can be storage card, smart card or mobile phone.Wherein, storage card comprises again SD card, TF card and USB flash disk, and smart card comprises again SIM card and UIM card.Yet the application in the payment devices of near field is only wherein a kind of application mode of above-mentioned tuning circuit, and it can also be used for any terminal equipment that needs to adopt tuning circuit.
The present embodiment comprises the tuning circuit of a plurality of tuner modules 300 by employing, select operation according to different switches, transfer to resonant circuit 200 after by the one or more tuner modules in a plurality of tuner modules 300, tuning current being processed, and match with capacitor C 1 and inductance L 1 resonance frequency of resonant circuit 200 is adjusted, reach and reduce the purpose that tuning current leaks, reduce simultaneously the quantity of the required electric capacity of whole tuning circuit, further reduce the circuit volume, and reduced circuit cost.
Embodiment two:
Fig. 6 shows the structure of the tuning circuit that second embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
Tuning circuit comprises first signal input module 101, secondary signal input module 102 and resonant circuit 103, to resonant circuit 103 output the first tuning current and second tune electric currents, resonant circuit 103 comprises capacitor C 11 and inductance L 11 respectively for first signal input module 101 and secondary signal input module 102.
Tuning circuit also comprises a plurality of the first tuner modules 104 and a plurality of second tune module 105, and the quantity of a plurality of the first tuner modules 104 and a plurality of second tune modules 105 is and is not less than 2 positive integer.
The input of a plurality of the first tuner modules 104 all connects the output of first signal input module 101, the output of a plurality of the first tuner modules 104 all is connected to the first end of inductance L 11 altogether with the first end of capacitor C 11, the input of a plurality of second tune modules 105 all connects the output of secondary signal input module 102, and the output of a plurality of second tune modules 105 all is connected to the second end of inductance L 11 altogether with the second end of capacitor C 11;
any one in any one in a plurality of the first tuner modules 104 or a plurality of the first tuner module and/or a plurality of second tune module 105 or the closed conducting by default of a plurality of second tune module, select operation according to switch, one or more the first tuner modules in a plurality of the first tuner modules 104 transfer to resonant circuit 103 after described the first tuning current is processed, and match with capacitor C 11 and inductance L 11 resonance frequency of resonant circuit 103 is adjusted, one or more second tune modules in a plurality of second tune modules 105 transfer to resonant circuit 103 after described second tune electric current is processed, and match with capacitor C 11 and inductance L 11 resonance frequency of resonant circuit 103 is adjusted.
In order to enlarge the tuning range of tuning circuit, as shown in Figure 7, tuning circuit also can comprise the auxiliary tuning module further, the auxiliary tuning module comprises inductor auxiliary tuning module 108 and/or capacitance kind auxiliary tuning module 109, the quantity of inductor auxiliary tuning module 108 and capacitance kind auxiliary tuning module 109 all can be one or more, and the quantity of the inductor auxiliary tuning module 108 in a plurality of auxiliary tuning modules and the quantity of capacitance kind auxiliary tuning module 109 can be respectively any positive integer;
The first end of the first end of inductor auxiliary tuning module 108 and capacitance kind auxiliary tuning module 109 all is connected in the first end of capacitor C 11, and the output of the output of inductor auxiliary tuning module 108 and capacitance kind auxiliary tuning module 109 all is connected in the second end of capacitor C 11.
In addition, in order to improve the performance of tuning circuit, make the Q value (being the ratio of the induction reactance loss resistance equivalent with it that present when working under the alternating voltage of a certain frequency of inductance L 11) of tuning circuit adjustable, and then the amplitude level of realizing output signal is adjustable, as shown in Figure 7, tuning circuit also can further comprise resistance R 1, and resistance R 1 is connected between the first end of the first end of capacitor C 11 and inductance L 11.Resistance R 1 can be to be made of by series, parallel or connection in series-parallel form a plurality of resistance, can be respectively also the adjustable resistance R of resistance 1, and especially, the resistance R 1 that resistance is adjustable can also be to be substituted by the different resistance that a plurality of switch arrays are controlled.
Fig. 8 shows the exemplary circuit structure of the tuning circuit corresponding with Fig. 6 that second embodiment of the invention provides, and the quantity of a plurality of the first tuner modules 104 and a plurality of second tune modules 105 value respectively is 2, for convenience of explanation, only show part related to the present invention, details are as follows:
Each first tuner module in a plurality of the first tuner modules 104 comprises switch S 11 and capacitor C s11, the first end of switch S 11 is the input of the first tuner module 104, the second end of switch S 11 connects the first end of capacitor C s11, and the second end of capacitor C s11 is the output of the first tuner module 104; The capacitance of the capacitor C s11 that each the first tuner module 104 is included can be identical or different, specifically can do different selections to the value of capacitance according to practical application request.
Each second tune module in a plurality of second tune modules 105 comprises switch S 12 and capacitor C s12, the first end of switch S 12 is the input of second tune module 105, the second end of switch S 12 connects the first end of capacitor C s12, and the second end of capacitor C s12 is the output of second tune module 105; The capacitance of the capacitor C s12 that each second tune module 105 is included can be identical or different, specifically can do different selections to the value of capacitance according to practical application request.
in the present embodiment, switch S 11 and switch S 12 can be that mechanical switch, semiconductor switch or other possess the components and parts of switching characteristic, capacitor C 11, capacitor C s11, capacitor C s12 and inductance L 11 can be by series connection by a plurality of components and parts of the same type, parallel connection or connection in series-parallel form consist of, it can be respectively also the adjustable capacitor C of capacitance 11, capacitor C s11, the inductance L 11 that capacitor C s12 and inductance value are adjustable, the capacitor C 11 that capacitance is adjustable, capacitor C s11 and capacitor C s12 can also adopt variable capacitance diode in other embodiments of the invention or the different electric capacity controlled by a plurality of switch arrays substitute, the inductance L 11 that inductance value is adjustable can also be substituted by the different induction that a plurality of switch arrays are controlled.
The tuning circuit that the present embodiment provides can be easily to the resistance of resistance R 1, the capacitance of capacitor C 11, capacitor C s11 and capacitor C s12 and the inductance value of inductance L 11 are adjusted, make resonant circuit 103 in desired working frequency range, resonance occur, and then improve the performance of resonant circuit 103.
Fig. 9 shows the exemplary circuit structure of the tuning circuit corresponding with Fig. 7 that second embodiment of the invention provides, and the equal value of quantity of inductor auxiliary tuning module 108 and capacitance kind auxiliary tuning module 109 is 1, for convenience of explanation, only show part related to the present invention, details are as follows:
Inductor auxiliary tuning module 108 comprises switch S 21 and inductance L 21, the first end of switch S 21 is the first end of inductor auxiliary tuning module 108, the second end of switch S 21 connects the first end of inductance L 21, and the second end of inductance L 21 is the second end of inductor auxiliary tuning module 108; When the quantity of inductor auxiliary tuning module 108 is a plurality of (namely being no less than 2), the inductance value of the inductance L 21 that each inductor auxiliary tuning module 108 is included can be identical or different, specifically can do different selections to the value of inductance value according to practical application request.
Capacitance kind auxiliary tuning module 109 comprises switch S 22 and capacitor C 21, the first end of switch S 22 is the first end of capacitance kind auxiliary tuning module 109, the second end of switch S 22 connects the first end of capacitor C 21, and the second end of capacitor C 21 is the second end of capacitance kind auxiliary tuning module 109; When the quantity of capacitance kind auxiliary tuning module 109 is a plurality of (namely being no less than 2), the capacitance of the capacitor C 21 that each capacitance kind auxiliary tuning module 109 is included can be identical or different, specifically can do different selections to the value of capacitance according to practical application request.
In the present embodiment, switch S 21 and switch S 22 can be that mechanical switch, semiconductor switch or other possess the components and parts of switching characteristic.
Below in conjunction with operation principle, Fig. 8 and Fig. 9, the above-mentioned tuning circuit that the present embodiment provides is described further:
by default, any in two the first tuner modules 104 and/or two second tune modules 105 or the closed conducting of a plurality of switch, the electric capacity access resonant circuit 103(described herein corresponding electric capacity corresponding with Closing Switch refers to Cs11, any one in Cs12 or two s' combination acquiescence access resonant circuit 103), so resonant circuit 103 can enter operating state and produce resonance signal when first signal input module 101 and/or secondary signal input module 102 begin to export tuning current, electric capacity in i.e. acquiescence access resonant circuit 103 transfers to resonant circuit 103 after the tuning current of first signal input module 101 and/or 102 outputs of secondary signal input module is processed, electric capacity in i.e. acquiescence access resonant circuit 103 matches to adjust resonance frequency with capacitor C 11 and inductance L 11, resonant circuit 103 is understood corresponding export resonance signals at this moment, the waveform of this resonance signal is comparatively smooth in passband, and its band edge has more precipitous cut-off waveform, therefore make the output voltage of tuning circuit more can satisfy the standard of oscillator signal, improved the performance of tuning circuit.Because the first tuner module 104 and/or second tune module 105 directly are not connected with the earth when switch is closed, so reduced the leakage of tuning current, make the resonance potential at inductance L 11 two ends satisfy corresponding requirement, and then improved the stability of resonant circuit.In addition, when switch S 21 and/or switch S 22 closed conducting, inductance L 21 or capacitor C 21 access resonant circuits 103 can play the effect of the tuning range that enlarges whole tuning circuit.
The present embodiment also provides a kind of near field payment devices that comprises above-mentioned tuning circuit, and this near field payment devices can be storage card, smart card or mobile phone.Wherein, storage card comprises again SD card, TF card and USB flash disk, and smart card comprises again SIM card and UIM card.Yet the application in the payment devices of near field is only wherein a kind of application mode of above-mentioned tuning circuit, and it can also be used for any terminal equipment that needs to adopt tuning circuit.
the present embodiment comprises a plurality of the first tuner modules 104 and a plurality of second tune module 105 by employing, tuning circuit, select operation according to different switches, transfer to resonant circuit 103 after by one or more the first tuner modules in a plurality of the first tuner modules 104, the first tuning current of first signal input module 101 outputs being processed, and match with capacitor C 11 and inductance L 11 resonance frequency of resonant circuit 103 is adjusted, and the one or more second tune modules in a plurality of second tune modules 105 transfer to resonant circuit 103 after the second tune electric current of secondary signal input module 102 outputs is processed, and match with capacitor C 11 and inductance L 11 resonance frequency of resonant circuit 103 is adjusted, reach and reduce the purpose that tuning current leaks, reduce simultaneously the quantity of the required electric capacity of whole tuning circuit, reduced the circuit volume, and reduced circuit cost.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (14)
1. tuning circuit, comprise signal input module and resonant circuit, described signal input module is used for to described resonant circuit output tuning current, and described resonant circuit comprises capacitor C 1 and inductance L 1, and the first end of the first end of described capacitor C 1 and described inductance L 1 is connected to ground altogether; It is characterized in that, described tuning circuit also comprises a plurality of tuner modules, and the quantity of described a plurality of tuner modules is to be not less than 2 positive integer;
The input of each tuner module in described a plurality of tuner module connects the output of described signal input module, and the output of each tuner module in described a plurality of tuner modules connects the second end of described capacitor C 1 and the second end of described inductance L 1 simultaneously;
Any one or the closed conducting by default of a plurality of tuner module in described a plurality of tuner module, select operation according to switch, one or more tuner modules in described a plurality of tuner module transfer to described resonant circuit after described tuning current is processed, and match with described capacitor C 1 and described inductance L 1 resonance frequency of described resonant circuit is adjusted.
2. tuning circuit as claimed in claim 1, it is characterized in that, each tuner module in described a plurality of tuner module includes switch and electric capacity, the first end of described switch is the input of described tuner module, the second end of described switch connects the first end of described electric capacity, and the second end of described electric capacity is the output of described tuner module; The capacitance of the described electric capacity that described each tuner module is included is identical or different.
3. tuning circuit as claimed in claim 1, it is characterized in that, described tuning circuit also comprises the auxiliary tuning module, described auxiliary tuning module comprises inductor auxiliary tuning module and/or capacitance kind auxiliary tuning module, and the quantity of described inductor auxiliary tuning module and described capacitance kind auxiliary tuning module is one or more;
The first end of described inductor auxiliary tuning module connects the second end of described capacitor C 1, the first end of described capacitance kind auxiliary tuning module also connects the second end of described capacitor C 1, and the second end of the second end of described inductor auxiliary tuning module and described capacitance kind auxiliary tuning module, the first end of described capacitor C 1 and the first end of described inductance L 1 are connected to ground altogether.
4. tuning circuit as claimed in claim 3, it is characterized in that, described inductor auxiliary tuning module comprises switch and inductance, the first end of described switch is the first end of described inductor auxiliary tuning module, the second end of described switch connects the first end of described inductance, and the second end of described inductance is the second end of described inductor auxiliary tuning module;
When being a plurality of, the inductance value of the described inductance that each described inductor auxiliary tuning module is included is identical or different when the quantity of described inductor auxiliary tuning module.
5. tuning circuit as claimed in claim 3, it is characterized in that, described capacitance kind auxiliary tuning module comprises switch and electric capacity, the first end of described switch is the first end of described capacitance kind auxiliary tuning module, the second end of described switch connects the first end of described electric capacity, and the second end of described electric capacity is the second end of described capacitance kind auxiliary tuning module;
When being a plurality of, the capacitance of the described electric capacity that each described capacitance kind auxiliary tuning module is included is identical or different when the quantity of described capacitance kind auxiliary tuning module.
6. a near field payment devices, is characterized in that, described near field payment devices comprises tuning circuit as described in claim 1 to 5 any one.
7. tuning circuit, comprise first signal input module, secondary signal input module and resonant circuit, to described resonant circuit output the first tuning current and second tune electric current, described resonant circuit comprises capacitor C 11 and inductance L 11 respectively for described first signal input module and described secondary signal input module; It is characterized in that, described tuning circuit also comprises a plurality of the first tuner modules and a plurality of second tune module, and described a plurality of the first tuner modules and described a plurality of second tune module number are and are not less than 2 positive integer;
The input of described a plurality of the first tuner modules all connects the output of described first signal input module, the output of described a plurality of the first tuner modules all is connected to the first end of described inductance L 11 altogether with the first end of described capacitor C 11, the input of described a plurality of second tune modules all connects the output of described secondary signal input module, and the output of described a plurality of second tune modules all is connected to the second end of described inductance L 11 altogether with the second end of described capacitor C 11;
any one in any one in described a plurality of the first tuner module or a plurality of the first tuner module and/or described a plurality of second tune module or the closed conducting by default of a plurality of second tune module, select operation according to switch, one or more the first tuner modules in described a plurality of the first tuner module transfer to described resonant circuit after described the first tuning current is processed, and match with described capacitor C 11 and described inductance L 11 resonance frequency of described resonant circuit is adjusted, one or more second tune modules in described a plurality of second tune module transfer to described resonant circuit after described second tune electric current is processed, and match with described capacitor C 11 and described inductance L 11 resonance frequency of described resonant circuit is adjusted.
8. tuning circuit as claimed in claim 7, it is characterized in that, each first tuner module in described a plurality of the first tuner module comprises switch and electric capacity, the first end of described switch is the input of described the first tuner module, the second end of described switch connects the first end of described electric capacity, and the second end of described electric capacity is the output of described the first tuner module; The capacitance of the described electric capacity that described each the first tuner module is included is identical or different.
9. tuning circuit as claimed in claim 7, it is characterized in that, each second tune module in described a plurality of second tune module comprises switch and electric capacity, the first end of described switch is the input of described second tune module, the second end of described switch connects the first end of described electric capacity, and the second end of described electric capacity is the output of described second tune module; The capacitance of the described electric capacity that described each second tune module is included is identical or different.
10. tuning circuit as claimed in claim 7, it is characterized in that, described tuning circuit also comprises the auxiliary tuning module, described auxiliary tuning module comprises inductor auxiliary tuning module and/or capacitance kind auxiliary tuning module, and the quantity of described inductor auxiliary tuning module and described capacitance kind auxiliary tuning module is one or more;
The first end of the first end of described inductor auxiliary tuning module and described capacitance kind auxiliary tuning module all is connected in the first end of described capacitor C 11, and the output of the output of described inductor auxiliary tuning module and described capacitance kind auxiliary tuning module all is connected in the second end of described capacitor C 11.
11. tuning circuit as claimed in claim 10, it is characterized in that, described inductor auxiliary tuning module comprises switch and inductance, the first end of described switch is the first end of described inductor auxiliary tuning module, the second end of described switch connects the first end of described inductance, and the second end of described inductance is the second end of described inductor auxiliary tuning module; When being a plurality of, the inductance value of the described inductance that each described inductor auxiliary tuning module is included is identical or different when the quantity of described inductor auxiliary tuning module.
12. tuning circuit as claimed in claim 10, it is characterized in that, described capacitance kind auxiliary tuning module comprises switch and electric capacity, the first end of described switch is the first end of described capacitance kind auxiliary tuning module, the second end of described switch connects the first end of described electric capacity, and the second end of described electric capacity is the second end of described capacitance kind auxiliary tuning module;
When being a plurality of, the capacitance of the described electric capacity that each described capacitance kind auxiliary tuning module is included is identical or different when the quantity of described capacitance kind auxiliary tuning module.
13. a near field payment devices is characterized in that, described near field payment devices comprises tuning circuit as described in claim 7 to 12 any one.
14. near field as described in claim 6 or 13 payment devices is characterized in that described near field payment devices is storage card, smart card or mobile phone.
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| CN201310066360.7A CN103178807B (en) | 2013-02-28 | 2013-02-28 | A kind of tuning circuit and near-field payment equipment |
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| CN201310066360.7A CN103178807B (en) | 2013-02-28 | 2013-02-28 | A kind of tuning circuit and near-field payment equipment |
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| CN103178807A true CN103178807A (en) | 2013-06-26 |
| CN103178807B CN103178807B (en) | 2015-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713904A (en) * | 2020-12-23 | 2021-04-27 | 陕西烽火电子股份有限公司 | Composite tuning network and antenna tuner |
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| CN1885714A (en) * | 2005-06-22 | 2006-12-27 | 因特格瑞特科技有限公司 | Tuning circuit |
| CN101002362A (en) * | 2004-07-26 | 2007-07-18 | 基奥赛拉无线公司 | System and method for dual-band antenna matching |
| CN101174843A (en) * | 2006-11-01 | 2008-05-07 | 三星电子株式会社 | Signal receiving apparatus and signal power prediction method thereof |
| CN102493154A (en) * | 2011-11-14 | 2012-06-13 | 南通市华冠电器有限公司 | Initial frequency regulating circuit of water level sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101002362A (en) * | 2004-07-26 | 2007-07-18 | 基奥赛拉无线公司 | System and method for dual-band antenna matching |
| CN1885714A (en) * | 2005-06-22 | 2006-12-27 | 因特格瑞特科技有限公司 | Tuning circuit |
| CN101174843A (en) * | 2006-11-01 | 2008-05-07 | 三星电子株式会社 | Signal receiving apparatus and signal power prediction method thereof |
| CN102493154A (en) * | 2011-11-14 | 2012-06-13 | 南通市华冠电器有限公司 | Initial frequency regulating circuit of water level sensor |
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| CN112713904A (en) * | 2020-12-23 | 2021-04-27 | 陕西烽火电子股份有限公司 | Composite tuning network and antenna tuner |
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| CN103178807B (en) | 2015-08-05 |
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