CN203734663U - Bluetooth matching circuit based on NFC - Google Patents
Bluetooth matching circuit based on NFC Download PDFInfo
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- CN203734663U CN203734663U CN201320850097.6U CN201320850097U CN203734663U CN 203734663 U CN203734663 U CN 203734663U CN 201320850097 U CN201320850097 U CN 201320850097U CN 203734663 U CN203734663 U CN 203734663U
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- 239000003990 capacitor Substances 0.000 claims description 37
- 238000004146 energy storage Methods 0.000 claims description 28
- 238000007599 discharging Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000007600 charging Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses a bluetooth matching circuit based on NFC comprising a power supply input end, an NFC module, a bluetooth control chip, a conversion circuit, and a switch control module. The conversion circuit is used for receiving an AC signal output by the NFC module, and can be used to convert the AC signal into DC pulse signal, and then can be used to output the DC pulse signal to the switch control module and the bluetooth control chip. The switch control module is used to output the power supply input by the power supply input end to the bluetooth control chip according to the DC pulse signal output by the conversion circuit, and therefore the power-on reset of the bluetooth control chip can be realized. The bluetooth control chip is used to output a control signal to the switch control module after the power-on reset, is used to control the switch control module to maintain the conduction state, and can enter the bluetooth matching state after receiving the DC pulse signal output by the conversion circuit. The bluetooth matching circuit is advantageous in that the bluetooth device in the power-off state can be awakened, and the automatic matching of the bluetooth and the external device can be realized, and therefore the energy can be saved, and the operation can be facilitated.
Description
Technical field
The utility model relates to bluetooth equipment technical field, particularly a kind of Bluetooth pairing circuit based on NFC.
Background technology
At present, wireless near field communication (NFC, Near Field Communicayion) for example, application on bluetooth equipment (, Bluetooth audio device) of technology is increasingly extensive, and it is mainly used in auxiliary bluetooth module and realizes quick pairing work.But, due to existing bluetooth equipment need to start shooting after could with peripheral hardware in bluetooth match, cause power consumption higher, and very inconvenient.
Utility model content
Main purpose of the present utility model, for a kind of Bluetooth pairing circuit based on NFC is provided, is intended to realize and bluetooth equipment is waken and realized under off-mode up bluetooth and external equipment automatic matching, with handled easily and saving energy consumption.
For achieving the above object, the utility model proposes a kind of Bluetooth pairing circuit based on NFC, should comprise NFC module, Bluetooth control chip, power input, change-over circuit and switch control module by the Bluetooth pairing circuit based on NFC, the input of described change-over circuit is connected with the output of described NFC module, and the output of described change-over circuit is connected with the trigger end of described switch control module; The input of described switch control module is connected with described power input, and the output of described switch control module is connected with the power end of described Bluetooth control chip; The feedback end of described switch control module is connected with a control output end of described Bluetooth control chip; The output of described change-over circuit is also connected with the trigger end of described Bluetooth control chip;
Wherein, described change-over circuit, for receiving the AC signal of NFC module output, and is converted to DC pulse signal by described AC signal, and described DC pulse signal is exported to described switch control module and described Bluetooth control chip;
Described switch control module, for according to the described DC pulse signal of described change-over circuit output, exports the power supply of described power input input to described Bluetooth control chip, and Bluetooth control chip power is resetted;
Described Bluetooth control chip, for export one after electrification reset, control signal to described switch control module, to control described switch control module, keep conducting state, and enter Bluetooth pairing state when receiving the described DC pulse signal of described change-over circuit output.
Preferably, described switch control module comprises output unit, the first switch element and holding unit, and the input of described output unit is connected with described power input, and the output of described output unit is connected with the power end of described Bluetooth control chip; One end of described the first switch element is connected with the output of described change-over circuit, and the other end is connected with the trigger end of described output unit; One end of described holding unit is connected with the described control output end of described Bluetooth control chip, and the other end is connected with the trigger end of described output unit;
Wherein, described output unit, for exporting from the power supply of described power input input;
Described the first switch element, for exporting the power supply from described power input input to according to described DC pulse signal the power end of described Bluetooth control chip;
Described holding unit, keeps output state for controlling described output unit according to the control signal of described Bluetooth control chip output.
Preferably, described change-over circuit comprises rectifier bridge, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first resistance and the second resistance, described rectifier bridge first input end is connected with the forward output of described NFC module through described the first electric capacity, and described rectifier bridge the second input is connected with the inverse output terminal of described NFC module through described the second electric capacity; One end of the first output of described rectifier bridge, one end of described the first resistance and described the 3rd electric capacity interconnects between two, the second output head grounding of described rectifier bridge, the other end ground connection of described the 3rd electric capacity, one end of one end of the other end of described the first resistance, described the 4th electric capacity and described the second resistance interconnects between two, the other end ground connection of described the 4th electric capacity, the output that the other end of described the second resistance is described change-over circuit.
Preferably, described output unit comprises the first switching tube, the 3rd resistance, the 4th resistance, the 5th resistance, the 5th electric capacity and the 6th electric capacity; The source electrode of described the first switching tube is connected with described power input through one end of described the 5th electric capacity, the other end ground connection of described the 5th capacitor C 5; The drain electrode of described the first switching tube is connected with the power end of described Bluetooth control chip, the grid of described the first switching tube is connected with one end of described the 4th resistance through described the 3rd resistance, and the other end of described the 4th resistance is electrically connected to described the first switch element and described holding unit respectively; One end of described the 6th electric capacity is connected with the source electrode of described the first switching tube, and the other end is connected with the grid of described the first switching tube; Described the 5th resistance is connected in parallel on the two ends of described the 6th electric capacity.
Preferably, described the first switch element comprises second switch pipe, the 6th resistance, the 7th resistance and the 7th electric capacity; One end of one end of the base stage of described second switch pipe, described the 6th resistance and described the 7th resistance interconnects between two, described the 6th other end of resistance and the output of described change-over circuit are connected, the other end ground connection of described the 7th resistance, the grounded emitter of described second switch pipe, the collector electrode of described second switch pipe is connected with the trigger end of described output unit; Described the 7th one end of electric capacity and the output of described change-over circuit are connected, other end ground connection.
Preferably, described holding unit comprises the 3rd switching tube, the 8th electric capacity, the 9th electric capacity, the 8th resistance and the 9th resistance, the base stage of described the 3rd switching tube is connected with the described control output end of described Bluetooth control chip through described the 8th resistance, described the 3rd collector electrode of switching tube and the trigger end of described output unit are connected, the grounded emitter of described the 3rd switching tube; One end of described the 8th electric capacity is connected with the collector electrode of described the 3rd switching tube, other end ground connection; One end of described the 9th electric capacity is connected with the base stage of described the 3rd switching tube, other end ground connection; Described the 9th resistance is connected in the two ends of described the 9th electric capacity in parallel.
Preferably, the described Bluetooth pairing circuit based on NFC also comprises Bluetooth pairing circuits for triggering, the input of described Bluetooth pairing circuits for triggering is connected with the output of described change-over circuit, and the output of described Bluetooth pairing circuits for triggering is connected with the trigger end of described Bluetooth control chip;
Described Bluetooth pairing circuits for triggering, after resetting at described Bluetooth control chip power, activate described Bluetooth control chip according to described DC pulse signal and enter Bluetooth pairing state.
Preferably, described Bluetooth pairing circuits for triggering comprise DC power supply, second switch unit and energy-storage units, the output of described DC power supply is connected with the input of described second switch unit, the output of described second switch unit is connected with described energy-storage units, and the trigger end of described second switch unit is connected with the output of described change-over circuit; The output of described energy-storage units is connected with the trigger end of described Bluetooth control chip.
Wherein, described second switch unit is used for controlling described DC power supply to described energy-storage units energy storage after the described DC pulse signal that receives described change-over circuit output.
Described energy-storage units, for discharging after the full electric energy of storage, activates Bluetooth control chip by this energy-storage units electric discharge and enters Bluetooth pairing state.
Preferably, described second switch unit comprises the 4th switching tube, the 5th switching tube, the tenth electric capacity, the tenth resistance, the 11 resistance, the 12 resistance and the 13 resistance, the base stage of described the 4th switching tube, described the tenth one end of resistance and one end of described the 11 resistance interconnect between two, described the tenth other end of resistance and the output of described change-over circuit are connected, the other end ground connection of described the 11 resistance, the collector electrode of described the 4th switching tube is connected with the base stage of described the 5th switching tube through described the 12 resistance, the grounded emitter of described the 4th switching tube, described the tenth one end of electric capacity and the output of described change-over circuit are connected, the other end ground connection of described the tenth electric capacity, described the 5th emitter of switching tube and the output of described DC power supply are connected, and collector electrode is connected with the input of described energy-storage units, one end of described the 13 resistance is connected with the emitter of described the 5th switching tube, and the other end is connected with the base stage of described the 5th switching tube.
Preferably, described energy-storage units comprises the 11 electric capacity, the 14 resistance, the 15 resistance, the first diode, one end of described the 11 electric capacity, the collector electrode of described the 5th switching tube, one end of described the 14 resistance, the anode of one end of described the 15 resistance and described the first diode interconnects between two, the other end ground connection of described the 11 electric capacity, the other end ground connection of described the 14 resistance, the other end of described the 15 resistance is connected with the trigger end of described Bluetooth control chip, the negative electrode of described the first diode is connected with described the 5th emitter of switching tube and the common port of the 13 resistance.
The Bluetooth pairing circuit based on NFC the utility model proposes, by change-over circuit, receive the AC signal of NFC module output, and after described AC signal is converted to DC pulse signal, described DC pulse signal is exported to described switch control module and described Bluetooth control chip, this switch control module exports the power supply of described power input input to described Bluetooth control chip according to described DC pulse signal, Bluetooth control chip power is resetted, and Bluetooth control chip is exported a control signal and is controlled described switch control module and keep conducting state after electrification reset, make Bluetooth control chip when receiving the DC pulse signal of described change-over circuit output and enter Bluetooth pairing state, therefore, realized and bluetooth equipment has been waken and realized under off-mode up bluetooth and external equipment automatic matching, thereby be convenient to operation and save energy consumption.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the Bluetooth pairing circuit preferred embodiment of the utility model based on NFC;
Fig. 2 is the electrical block diagram of the Bluetooth pairing circuit preferred embodiment of the utility model based on NFC.
The realization of the utility model object, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Shown in Fig. 1 and Fig. 2, Fig. 1 is the circuit block diagram of the Bluetooth pairing circuit preferred embodiment of the utility model based on NFC; Fig. 2 is the electrical block diagram of the Bluetooth pairing circuit preferred embodiment of the utility model based on NFC.
The utility model provides a kind of Bluetooth pairing circuit based on NFC, should be applicable in the bluetooth equipments such as Bluetooth audio device, bluetooth earphone by the Bluetooth pairing circuit based on NFC, can realize this bluetooth equipment under open state not, by external equipment and this bluetooth equipment near or touching, and realize, automatically wake bluetooth up and realize the bluetooth of external equipment and the bluetooth automatic matching of this bluetooth equipment.
With reference to Fig. 1, in one embodiment, should comprise power input Vin, NFC module 10, change-over circuit 20, switch control module 30 and Bluetooth control chip 40 by the Bluetooth pairing circuit based on NFC, the input of described change-over circuit 20 is connected with the output of described NFC module 10, and the output of described change-over circuit 20 is connected with the trigger end of described switch control module 30; The input of described switch control module 30 is connected with described power input Vin, and the output of described switch control module 30 is connected with the power end MCU_VCC of described Bluetooth control chip 40; The feedback end of described switch control module 30 is connected with a control output end MCU_I/O1 of described Bluetooth control chip 40; The output of described change-over circuit 20 is also connected with the trigger end MCU_I/O2 of described Bluetooth control chip 40.
Particularly, above-mentioned power input Vin is for being connected with the power end MCU_VCC of Bluetooth control chip 40.
Above-mentioned NFC module 10 for the NFC chip of equipment externally with it near or produce an AC signal output during touching.
Above-mentioned change-over circuit 20, for receiving the AC signal of NFC module 10 outputs, and is converted to DC pulse signal by described AC signal, and described DC pulse signal is exported to described switch control module 30 and described Bluetooth control chip 40.DC pulse signal described in the present embodiment is high level.
Above-mentioned switch control module 30, for according to the described DC pulse signal of described change-over circuit 20 outputs, exports the power supply of described power input Vin input to described Bluetooth control chip 40, makes Bluetooth control chip 40 electrification resets.
Above-mentioned Bluetooth control chip 40, for export one after electrification reset, control signal to described switch control module 30, and control described switch control module 30 maintenance conducting states, and when receiving the described DC pulse signal of described change-over circuit 20 outputs, enter Bluetooth pairing state.This Bluetooth control chip 40 is preset as output high level by a control output end MCU_I/O1, by this high level signal, make switch control module 30 always in conducting state, thereby make, from the power supply of power input Vin input always to 40 power supplies of Bluetooth control chip, to make Bluetooth control chip 40 in wake-up states.In addition, via the described DC pulse signal of above-mentioned change-over circuit 20 outputs, be delivered to the trigger end MCU_I/O2 of Bluetooth control chip 40 simultaneously, when Bluetooth control chip 40 is during in wake-up states, this DC pulse signal can activate Bluetooth control chip 40 and enter Bluetooth pairing state, thereby this Bluetooth control chip 40 and the bluetooth in external equipment are matched.
The utility model circuit receives the AC signal of NFC module 10 outputs by change-over circuit 20, and after described AC signal is converted to DC pulse signal, described DC pulse signal is exported to described switch control module 30 and described Bluetooth control chip 40, this switch control module 30 exports the power supply of described power input Vin input to described Bluetooth control chip 40 according to described DC pulse signal, make Bluetooth control chip 40 electrification resets, and Bluetooth control chip 40 is exported a control signal and is controlled described switch control module 30 and keep conducting states after electrification reset, make Bluetooth control chip 40 when receiving the DC pulse signal of described change-over circuit 20 outputs and enter Bluetooth pairing state, therefore, realized and bluetooth equipment has been waken and realized under off-mode up bluetooth and external equipment automatic matching, thereby facilitated operation and saved energy consumption.
Further, with reference to Fig. 2, above-mentioned change-over circuit 20 comprises rectifier bridge Z, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the first resistance R 1 and the second resistance R 2.Wherein, rectifier bridge Z is for being rectified into direct current signal from the AC signal of NFC module 10 outputs.
Wherein, described rectifier bridge Z first input end is connected with the forward output of described NFC module 10 through described the first capacitor C 1, and described rectifier bridge Z the second input is connected with the inverse output terminal of described NFC module 10 through described the second capacitor C 2; One end of the first output of described rectifier bridge Z, one end of described the first resistance R 1 and described the 3rd capacitor C 3 interconnects between two, the second output head grounding of described rectifier bridge Z, the other end ground connection of described the 3rd capacitor C 3, one end of one end of the other end of described the first resistance R 1, described the 4th capacitor C 4 and described the second resistance R 2 interconnects between two, the other end ground connection of described the 4th capacitor C 4, the other end of described the second resistance R 2 is the output of described change-over circuit 20.
Further, with reference to Fig. 1 and Fig. 2, above-mentioned switch control module 30 comprises output unit 31, the first switch element 32 and holding unit 33.The input of described output unit 31 is connected with described power input Vin, and the output of described output unit 31 is connected with the power end MCU_VCC of described Bluetooth control chip 40; One end of described the first switch element 32 is connected with the output of described change-over circuit 20, and the other end is connected with the trigger end of described output unit 31; One end of described holding unit 33 is connected with the described control output end MCU_I/O1 of described Bluetooth control chip 40, and the other end is connected with the trigger end of described output unit 31.
Particularly, above-mentioned output unit 31, for exporting from the power supply of described power input Vin input.
Above-mentioned the first switch element 32, for exporting the power supply from described power input Vin input to according to described DC pulse signal the power end MCU_VCC of described Bluetooth control chip 40.
Above-mentioned holding unit 33, keeps output state for control described output unit 31 according to the control signal of described Bluetooth control chip 40 outputs.
Further, with reference to Fig. 1 and Fig. 2, above-mentioned output unit 31 comprises the first switching tube Q1, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 5th capacitor C 5 and the 6th capacitor C 6.In the present embodiment, described the first switching tube Q1 is preferably the metal-oxide-semiconductor of P raceway groove.
Wherein, the source electrode of described the first switching tube Q1 is connected with described power input Vin through one end of described the 5th capacitor C 5, the other end ground connection of described the 5th capacitor C 5; The drain electrode of described the first switching tube Q1 is connected with the power end MCU_VCC of described Bluetooth control chip 40, the grid of described the first switching tube Q1 is connected with one end of described the 4th resistance R 4 through described the 3rd resistance R 3, and the other end of described the 4th resistance R 4 is electrically connected to described the first switch element 32 and described holding unit 33 respectively; One end of described the 6th capacitor C 6 is connected with the source electrode of described the first switching tube Q1, and the other end is connected with the grid of described the first switching tube Q1; Described the 5th resistance R 5 is connected in parallel on the two ends of described the 6th capacitor C 6.
Further, with reference to Fig. 1 and Fig. 2, above-mentioned the first switch element 32 comprises second switch pipe Q2, the 6th resistance R 6, the 7th resistance R 7 and the 7th capacitor C 7.In the present embodiment, described second switch pipe Q2 is preferably NPN type triode.
Wherein, one end of the base stage of described second switch pipe Q2, one end of described the 6th resistance R 6 and described the 7th resistance R 7 interconnects between two, the other end of described the 6th resistance R 6 is connected with the output of described change-over circuit 20, the other end ground connection of described the 7th resistance R 7, the grounded emitter of described second switch pipe Q2, the collector electrode of described second switch pipe Q2 is connected with the trigger end of described output unit 31; One end of described the 7th capacitor C 7 is connected with the output of described change-over circuit 20, other end ground connection.
Further, with reference to Fig. 1 and Fig. 2, above-mentioned holding unit 33 comprises the 3rd switching tube Q3, the 8th capacitor C 8, the 9th capacitor C 9, the 8th resistance R 8 and the 9th resistance R 9.In the present embodiment, described the 3rd switching tube Q3 is preferably NPN type triode.
Wherein, the base stage of described the 3rd switching tube Q3 is connected with the described control output end MCU_I/O1 of described Bluetooth control chip 40 through described the 8th resistance R 8, the collector electrode of described the 3rd switching tube Q3 is connected with the trigger end of described output unit 31, the grounded emitter of described the 3rd switching tube Q3; One end of described the 8th capacitor C 8 is connected with the collector electrode of described the 3rd switching tube Q3, other end ground connection; One end of described the 9th capacitor C 9 is connected with the base stage of described the 3rd switching tube Q3, other end ground connection; Described the 9th resistance R 9 is connected in the two ends of described the 9th capacitor C 9 in parallel.
Further, with reference to Fig. 1 and Fig. 2, the above-mentioned Bluetooth pairing circuit based on NFC also comprises Bluetooth pairing circuits for triggering 50, the input of described Bluetooth pairing circuits for triggering 50 is connected with the output of described change-over circuit 20, and the output of described Bluetooth pairing circuits for triggering 50 is connected with the trigger end MCU_I/O2 of described Bluetooth control chip 40.
Wherein, above-mentioned Bluetooth pairing circuits for triggering 50, for after described Bluetooth control chip 40 electrification resets, activate described Bluetooth control chip 40 according to described DC pulse signal and enter Bluetooth pairing state.
Further, with reference to Fig. 1 and Fig. 2, above-mentioned Bluetooth pairing circuits for triggering 50 comprise DC power supply VDD, second switch unit 51 and energy-storage units 52, the output of described DC power supply VDD is connected with the input of described second switch unit 51, the output of described second switch unit 51 is connected with described energy-storage units 52, and the trigger end of described second switch unit 51 is connected with the output of described change-over circuit 20; The output of described energy-storage units 52 is connected with the trigger end MCU_I/O2 of described Bluetooth control chip 40.
Particularly, DC power supply VDD is controlled to energy-storage units 52 energy storage after for the DC pulse signal receiving change-over circuit 20 output in above-mentioned second switch unit 51.
Above-mentioned energy-storage units 52, for discharging after the full electric energy of storage, activates Bluetooth control chip 40 by these energy-storage units 52 electric discharges and enters Bluetooth pairing state.Wherein, energy-storage units 52 can carry out time delay by the DC pulse signal through change-over circuit 20 outputs, prevent that Bluetooth control chip 40 from also not waking up, and the DC pulse signal of change-over circuit 20 outputs has arrived the trigger end MCU_I/O2 of Bluetooth control chip 40, so that Bluetooth control chip 40 is not activated by this DC pulse signal, thereby need repetitive operation, bothersome effort.
Further, with reference to Fig. 1 and Fig. 2, above-mentioned second switch unit 51 comprises the 4th switching tube Q4, the 5th switching tube Q5, the tenth capacitor C 10, the tenth resistance R the 10, the 11 resistance R the 11, the 12 resistance R 12 and the 13 resistance R 13.In the present embodiment, described the 4th switching tube Q4 is preferably NPN type triode, and the 5th switching tube Q5 is preferably positive-negative-positive triode.
Wherein, the base stage of described the 4th switching tube Q4, described the tenth one end of resistance R 10 and one end of described the 11 resistance R 11 interconnect between two, the other end of described the tenth resistance R 10 is connected with the output of described change-over circuit 20, the other end ground connection of described the 11 resistance R 11, the collector electrode of described the 4th switching tube Q4 is connected with the base stage of described the 5th switching tube Q5 through described the 12 resistance R 12, the grounded emitter of described the 4th switching tube Q4; One end of described the tenth capacitor C 10 is connected with the output of described change-over circuit 20, the other end ground connection of described the tenth capacitor C 10; Described the 5th emitter of switching tube Q5 and the output of described DC power supply VDD are connected, and collector electrode is connected with the input of described energy-storage units 52; One end of described the 13 resistance R 13 is connected with the emitter of described the 5th switching tube Q5, and the other end is connected with the base stage of described the 5th switching tube Q5.
Further, with reference to Fig. 1 and Fig. 2, above-mentioned energy-storage units 52 comprises the 11 capacitor C the 11, the 14 resistance R the 14, the 15 resistance R 15 and the first diode D1.Wherein, after above-mentioned the 5th switching tube Q5 conducting, control DC power supply VDD the 11 capacitor C 11 is charged, after being full of electricity, through the 14 resistance R 14 and the first diode D1, discharge respectively, wherein, the first diode D1 can accelerate the velocity of discharge of the 11 capacitor C 11.In the present embodiment, by the 11 capacitor C 11 electric discharges, activate Bluetooth control chip 40, make it enter Bluetooth pairing state.Be understandable that, by the charge and discharge of the 11 capacitor C 11, effectively extended the time of activating Bluetooth control chip 40, is provided to wake up (electrification reset) of Bluetooth control chip 40 the sufficient time, realize same triggering signal, realize waking up and bluetooth automatic matching of Bluetooth control chip 40, therefore, facilitated operation.In addition, because be realizes bluetooth automatic matching under off-mode, can also realize energy-saving and cost-reducing object.
Wherein, the collector electrode of one end of described the 11 capacitor C 11, described the 5th switching tube Q5, described the 14 one end of resistance R 14, the anode of one end of described the 15 resistance R 15 and described the first diode D1 interconnect between two, the other end ground connection of described the 11 capacitor C 11, the other end ground connection of described the 14 resistance R 14, the other end of described the 15 resistance R 15 is connected with the trigger end MCU_I/O2 of described Bluetooth control chip 40, and the negative electrode of described the first diode D1 is connected with described the 5th emitter of switching tube Q5 and the common port of the 13 resistance R 13.
For the principle of the utility model circuit is described better, below in conjunction with Fig. 1 and Fig. 2, this circuit of utility model is described in detail.
As Fig. 1 and Fig. 2, suppose in this Bluetooth pairing circuit application and Bluetooth audio device based on NFC, this Bluetooth audio device is in off-mode, for example, NFC chip in external equipment (NFC mobile phone) near or while touching the NFC module 10 in this Bluetooth audio device (within guaranteeing the communication distance at NFC), NFC module 10 in this Bluetooth audio device is triggered, and send an AC signal, this AC signal is carried out rectification through rectifier bridge Z, become DC pulse signal and export a place in network to through described the second resistance R 2, now this signal is divided into two-way:
One tunnel is second switch pipe Q2 conducting, and by the first switching tube Q1 conducting, makes to input to the power supply voltage supplying Bluetooth control chip 40 of power input Vin.Wherein, this power input Vin can connect power supply by battery or power supply adaptor.After Bluetooth control chip 40 powers on, from high level signal of control output end MCU_I/O1 output of this Bluetooth control chip 40, control the 3rd switching tube Q3 conducting, and then make the first switching tube Q1 always in conducting state, thereby realize Bluetooth control chip 40 always in power-up state.
Another Lu Jing ten resistance R 10 are delivered to the base stage of the 4th switching tube Q4, make the 4th switching tube Q4 conducting, and then the 5th switching tube Q5 conducting, make DC power supply VDD to the 11 capacitor C 11 chargings, when the 11 capacitor C 11 is full of electricity by the 14 resistance R 14 electric discharges, and high level signal of output activates Bluetooth control chip 40, make Bluetooth control chip 40 enter pairing state, the bluetooth automatically and in external equipment is matched.
In sum, owing to realizing bluetooth equipment under off-mode, automatically wake and realize bluetooth automatic matching up, therefore, not only can save the energy, and more convenient people's operation.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. the Bluetooth pairing circuit based on NFC, comprise NFC module, Bluetooth control chip, it is characterized in that, also comprise power input, change-over circuit and switch control module, the input of described change-over circuit is connected with the output of described NFC module, and the output of described change-over circuit is connected with the trigger end of described switch control module; The input of described switch control module is connected with described power input, and the output of described switch control module is connected with the power end of described Bluetooth control chip; The feedback end of described switch control module is connected with a control output end of described Bluetooth control chip; The output of described change-over circuit is also connected with the trigger end of described Bluetooth control chip;
Wherein, described change-over circuit, for receiving the AC signal of NFC module output, and is converted to DC pulse signal by described AC signal, and described DC pulse signal is exported to described switch control module and described Bluetooth control chip;
Described switch control module, for according to the described DC pulse signal of described change-over circuit output, exports the power supply of described power input input to described Bluetooth control chip, and Bluetooth control chip power is resetted;
Described Bluetooth control chip, for export one after electrification reset, control signal to described switch control module, to control described switch control module, keep conducting state, and enter Bluetooth pairing state when receiving the described DC pulse signal of described change-over circuit output.
2. the Bluetooth pairing circuit based on NFC according to claim 1, it is characterized in that, described switch control module comprises output unit, the first switch element and holding unit, the input of described output unit is connected with described power input, and the output of described output unit is connected with the power end of described Bluetooth control chip; One end of described the first switch element is connected with the output of described change-over circuit, and the other end is connected with the trigger end of described output unit; One end of described holding unit is connected with the described control output end of described Bluetooth control chip, and the other end is connected with the trigger end of described output unit;
Wherein, described output unit, for exporting from the power supply of described power input input;
Described the first switch element, for exporting the power supply from described power input input to according to described DC pulse signal the power end of described Bluetooth control chip;
Described holding unit, keeps output state for controlling described output unit according to the control signal of described Bluetooth control chip output.
3. the Bluetooth pairing circuit based on NFC according to claim 1, it is characterized in that, described change-over circuit comprises rectifier bridge, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first resistance and the second resistance, described rectifier bridge first input end is connected with the forward output of described NFC module through described the first electric capacity, and described rectifier bridge the second input is connected with the inverse output terminal of described NFC module through described the second electric capacity; One end of the first output of described rectifier bridge, one end of described the first resistance and described the 3rd electric capacity interconnects between two, the second output head grounding of described rectifier bridge, the other end ground connection of described the 3rd electric capacity, one end of one end of the other end of described the first resistance, described the 4th electric capacity and described the second resistance interconnects between two, the other end ground connection of described the 4th electric capacity, the output that the other end of described the second resistance is described change-over circuit.
4. the Bluetooth pairing circuit based on NFC according to claim 2, is characterized in that, described output unit comprises the first switching tube, the 3rd resistance, the 4th resistance, the 5th resistance, the 5th electric capacity and the 6th electric capacity; The source electrode of described the first switching tube is connected with described power input through one end of described the 5th electric capacity, the other end ground connection of described the 5th capacitor C 5; The drain electrode of described the first switching tube is connected with the power end of described Bluetooth control chip, the grid of described the first switching tube is connected with one end of described the 4th resistance through described the 3rd resistance, and the other end of described the 4th resistance is electrically connected to described the first switch element and described holding unit respectively; One end of described the 6th electric capacity is connected with the source electrode of described the first switching tube, and the other end is connected with the grid of described the first switching tube; Described the 5th resistance is connected in parallel on the two ends of described the 6th electric capacity.
5. the Bluetooth pairing circuit based on NFC according to claim 2, is characterized in that, described the first switch element comprises second switch pipe, the 6th resistance, the 7th resistance and the 7th electric capacity; One end of one end of the base stage of described second switch pipe, described the 6th resistance and described the 7th resistance interconnects between two, described the 6th other end of resistance and the output of described change-over circuit are connected, the other end ground connection of described the 7th resistance, the grounded emitter of described second switch pipe, the collector electrode of described second switch pipe is connected with the trigger end of described output unit; Described the 7th one end of electric capacity and the output of described change-over circuit are connected, other end ground connection.
6. the Bluetooth pairing circuit based on NFC according to claim 2, it is characterized in that, described holding unit comprises the 3rd switching tube, the 8th electric capacity, the 9th electric capacity, the 8th resistance and the 9th resistance, the base stage of described the 3rd switching tube is connected with the described control output end of described Bluetooth control chip through described the 8th resistance, described the 3rd collector electrode of switching tube and the trigger end of described output unit are connected, the grounded emitter of described the 3rd switching tube; One end of described the 8th electric capacity is connected with the collector electrode of described the 3rd switching tube, other end ground connection; One end of described the 9th electric capacity is connected with the base stage of described the 3rd switching tube, other end ground connection; Described the 9th resistance is connected in the two ends of described the 9th electric capacity in parallel.
7. the Bluetooth pairing circuit based on NFC according to claim 1, it is characterized in that, the described Bluetooth pairing circuit based on NFC also comprises Bluetooth pairing circuits for triggering, the input of described Bluetooth pairing circuits for triggering is connected with the output of described change-over circuit, and the output of described Bluetooth pairing circuits for triggering is connected with the trigger end of described Bluetooth control chip;
Described Bluetooth pairing circuits for triggering, after resetting at described Bluetooth control chip power, activate described Bluetooth control chip according to described DC pulse signal and enter Bluetooth pairing state.
8. the Bluetooth pairing circuit based on NFC according to claim 7, it is characterized in that, described Bluetooth pairing circuits for triggering comprise DC power supply, second switch unit and energy-storage units, the output of described DC power supply is connected with the input of described second switch unit, the output of described second switch unit is connected with described energy-storage units, and the trigger end of described second switch unit is connected with the output of described change-over circuit; The output of described energy-storage units is connected with the trigger end of described Bluetooth control chip;
Wherein, described second switch unit is used for controlling described DC power supply to described energy-storage units energy storage after the described DC pulse signal that receives described change-over circuit output;
Described energy-storage units, for discharging after the full electric energy of storage, activates Bluetooth control chip by this energy-storage units electric discharge and enters Bluetooth pairing state.
9. the Bluetooth pairing circuit based on NFC according to claim 8, it is characterized in that, described second switch unit comprises the 4th switching tube, the 5th switching tube, the tenth electric capacity, the tenth resistance, the 11 resistance, the 12 resistance and the 13 resistance, the base stage of described the 4th switching tube, described the tenth one end of resistance and one end of described the 11 resistance interconnect between two, described the tenth other end of resistance and the output of described change-over circuit are connected, the other end ground connection of described the 11 resistance, the collector electrode of described the 4th switching tube is connected with the base stage of described the 5th switching tube through described the 12 resistance, the grounded emitter of described the 4th switching tube, described the tenth one end of electric capacity and the output of described change-over circuit are connected, the other end ground connection of described the tenth electric capacity, described the 5th emitter of switching tube and the output of described DC power supply are connected, and collector electrode is connected with the input of described energy-storage units, one end of described the 13 resistance is connected with the emitter of described the 5th switching tube, and the other end is connected with the base stage of described the 5th switching tube.
10. the Bluetooth pairing circuit based on NFC according to claim 9, it is characterized in that, described energy-storage units comprises the 11 electric capacity, the 14 resistance, the 15 resistance, the first diode, one end of described the 11 electric capacity, the collector electrode of described the 5th switching tube, one end of described the 14 resistance, the anode of one end of described the 15 resistance and described the first diode interconnects between two, the other end ground connection of described the 11 electric capacity, the other end ground connection of described the 14 resistance, the other end of described the 15 resistance is connected with the trigger end of described Bluetooth control chip, the negative electrode of described the first diode is connected with described the 5th emitter of switching tube and the common port of the 13 resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850097.6U CN203734663U (en) | 2013-12-20 | 2013-12-20 | Bluetooth matching circuit based on NFC |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850097.6U CN203734663U (en) | 2013-12-20 | 2013-12-20 | Bluetooth matching circuit based on NFC |
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| Publication Number | Publication Date |
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| CN203734663U true CN203734663U (en) | 2014-07-23 |
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| CN201320850097.6U Expired - Fee Related CN203734663U (en) | 2013-12-20 | 2013-12-20 | Bluetooth matching circuit based on NFC |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486672A (en) * | 2014-12-30 | 2015-04-01 | 青岛歌尔声学科技有限公司 | NFC volume adjustment circuit and NFC volume adjustment method |
| WO2016155179A1 (en) * | 2015-03-31 | 2016-10-06 | 苏州海博智能系统有限公司 | Bluetooth smart card chip, bluetooth smart card and bluetooth connection activating method therefor |
| CN108400799A (en) * | 2018-04-18 | 2018-08-14 | 深圳市全智芯科技有限公司 | A kind of method of novel unlatching wireless pairing |
| CN112335270A (en) * | 2018-06-20 | 2021-02-05 | 伟业达股份有限公司 | Information processing apparatus |
| CN113993113A (en) * | 2021-10-28 | 2022-01-28 | 深圳市创鸿新智能科技有限公司 | A Bluetooth beacon, a Bluetooth system and a contactless activation method |
-
2013
- 2013-12-20 CN CN201320850097.6U patent/CN203734663U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486672A (en) * | 2014-12-30 | 2015-04-01 | 青岛歌尔声学科技有限公司 | NFC volume adjustment circuit and NFC volume adjustment method |
| CN104486672B (en) * | 2014-12-30 | 2017-12-19 | 青岛歌尔声学科技有限公司 | NFC volume control circuits and NFC volume adjusting methods |
| WO2016155179A1 (en) * | 2015-03-31 | 2016-10-06 | 苏州海博智能系统有限公司 | Bluetooth smart card chip, bluetooth smart card and bluetooth connection activating method therefor |
| CN108400799A (en) * | 2018-04-18 | 2018-08-14 | 深圳市全智芯科技有限公司 | A kind of method of novel unlatching wireless pairing |
| CN108400799B (en) * | 2018-04-18 | 2024-02-13 | 深圳市全智芯科技有限公司 | Novel method for starting wireless pairing |
| CN112335270A (en) * | 2018-06-20 | 2021-02-05 | 伟业达股份有限公司 | Information processing apparatus |
| CN113993113A (en) * | 2021-10-28 | 2022-01-28 | 深圳市创鸿新智能科技有限公司 | A Bluetooth beacon, a Bluetooth system and a contactless activation method |
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