CN206294336U - Bluetooth audio frequency circuit and Bluetooth audio frequency device - Google Patents

Abstract

The utility model discloses Bluetooth audio frequency circuit, including the bluetooth module and audio-frequency module being electrically connected with, audio-frequency module is used to process the audio signal of bluetooth module reception, and audio-frequency module includes COBBAIF, it is characterised in that：COBBAIF includes the first contact and zero potential contact, and when audio device plug accesses COBBAIF, the first contact connects with zero potential contact；Bluetooth audio frequency circuit also includes switch module, and switch module includes PMOS units, and the grid of PMOS units and the first contact are electrically connected with, and the source electrode of PMOS units is connected with the positive pole of power supply, and the drain electrode of PMOS units is electrically connected with the first power supply interface of bluetooth module.When the plug of audio frequency apparatus is not inserted into COBBAIF, bluetooth module can not start；When the plug of audio frequency apparatus is extracted from COBBAIF, bluetooth module power down is stopped；So as to avoid not using Bluetooth audio frequency device mistiming from Bluetooth audio frequency device is started shooting power consumption by switch, or audio is commenced play out, caused inconvenience to the user.

Description

Bluetooth audio frequency circuit and Bluetooth audio frequency device

Technical field

The utility model is related to electronic device field, more particularly to Bluetooth audio frequency circuit and Bluetooth audio frequency device.

Background technology

Bluetooth Communication Technology makes people break away from the torment of wire rod, and Bluetooth technology is applied into audio plays, records or lead to Words provide the user and greatly facilitate.Existing Bluetooth audio frequency device major part is earphone, the wheat that audio is played or recorded Gram wind is integrated in Bluetooth audio frequency device, such as bluetooth earphone, Baffle Box of Bluetooth, does not possess the interface of external audio frequency equipment again.Also have Some Bluetooth audio frequency devices have the interface of external audio frequency equipment, but when Bluetooth audio frequency device is not used, indigo plant are easily touched by mistake The switch of tooth audio devices, makes the start power consumption of Bluetooth audio frequency device, or commences play out audio, causes inconvenience to the user.

Utility model content

In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide Bluetooth audio frequency circuit and Bluetooth audio frequency Device, when it can solve existing Bluetooth audio frequency device and does not use, easily touches the switch of Bluetooth audio frequency device by mistake, makes Bluetooth audio frequency Device start power consumption, or audio is commenced play out, the problem for causing inconvenience to the user.

The purpose of this utility model is realized using following technical scheme：

Bluetooth audio frequency circuit, including the bluetooth module and audio-frequency module being electrically connected with, the audio-frequency module are used to process institute The audio signal of bluetooth module reception is stated, the audio-frequency module includes COBBAIF, it is characterised in that：The COBBAIF includes First contact and zero potential contact, when audio device plug accesses the COBBAIF, first contact and zero potential are touched Point connection；

The Bluetooth audio frequency circuit also includes switch module, and the switch module includes PMOS units, the PMOS units Grid be electrically connected with first contact, the source electrode of the PMOS units is connected with the positive pole of power supply, the PMOS units The first power supply interface of drain electrode and the bluetooth module be electrically connected with.

Preferably, the switch interface of the bluetooth module is connected and turned off with the drain electrode of the PMOS units by switch.

Preferably, the drain electrode of the PMOS units is also electrically connected at the power supply interface of the audio-frequency module.

Preferably, the Bluetooth audio frequency circuit also includes charging inlet, and the switch module also includes controllable switch element, The positive pole of the charging inlet is electrically connected with the control pin of the controllable switch element, the input of the controllable switch element End is electrically connected at the source electrode of the PMOS units, the output head grounding of the controllable switch element.

Preferably, the controllable switch element is NPN type triode, specifically, the base stage of NPN type triode is filled with described The positive pole of electrical interface is electrically connected with, and the colelctor electrode of the NPN type triode is electrically connected at the source electrode of the PMOS units, described The grounded emitter of NPN type triode.

Preferably, the positive pole of the charging inlet is connected to the charging inlet of the bluetooth module.

Preferably, the battery detecting interface of the bluetooth module is connected to the positive pole of the power supply.

Preferably, the bluetooth module includes F3188_CSR8645 chips.

Preferably, the audio-frequency module includes TPA6132A2 chips.

Bluetooth audio frequency device, including Bluetooth audio frequency circuit as claimed in any one of claims 1-9 wherein.

Compared to existing technology, the beneficial effects of the utility model are：When be not inserted into COBBAIF audio frequency apparatus insert During head, bluetooth module can not start；When the plug of audio frequency apparatus is extracted from COBBAIF, bluetooth module power down stops work Make；So as to avoid not using Bluetooth audio frequency device mistiming from Bluetooth audio frequency device is started shooting power consumption by switch, or audio is commenced play out, Cause inconvenience to the user.

Brief description of the drawings

Fig. 1 is the circuit diagram of the Bluetooth audio frequency circuit that the utility model embodiment one is provided.

Fig. 2 is the circuit diagram of the Bluetooth audio frequency circuit that the utility model embodiment two is provided.

Fig. 3 is the circuit diagram of the electret microphone input circuit of Bluetooth audio frequency circuit in Fig. 2.

Fig. 4 is the decomposing schematic representation of the Bluetooth audio frequency device that the utility model embodiment three is provided.

Fig. 5 is the combination diagram of Bluetooth audio frequency device in Fig. 4.

Specific embodiment

Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model Art means, and being practiced according to the content of specification, and in order to allow above and other purpose of the present utility model, feature Can be become apparent with advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, described in detail as follows.

Embodiment one：

Bluetooth audio frequency circuit as shown in Figure 1, including the bluetooth module 100 and audio-frequency module 200 being electrically connected with, audio mould Block 200 is used to process the audio signal of the reception of the bluetooth module 100, and audio-frequency module 200 includes COBBAIF 210, and audio connects Mouth 210 includes the first contact 211 and zero potential contact 212, and the first contact 211 and zero potential contact 212 are used for by audio frequency apparatus Plug is connected, i.e., when audio device plug accesses COBBAIF 210, the first contact 211 connects with zero potential contact 212.

Bluetooth audio frequency circuit also includes switch module 300, and switch module 300 includes PMOS units 310, PMOS units 310 Grid G be electrically connected with the first contact 211, the source S of PMOS units 310 is connected with the positive pole of power supply 400, PMOS units 310 drain D is electrically connected with the first power supply interface 101 of bluetooth module 100.

The plug of the audio frequency apparatuses such as earphone, audio amplifier, such as headset plug of four-part form structure, its MIC Mike and GND ground connection two Individual contact connects at microphone.When the plug of audio frequency apparatus is inserted in COBBAIF 210, the first of COBBAIF 210 touches Point 211 and zero potential contact 212 are electrically connected with, and are also zero potential equivalent to the first contact 211, and electrical with the first contact 211 The grid G voltage of the PMOS units 310 of connection is now also close to zero；Due to the source S and power supply 400 of PMOS units 310 Positive pole is connected, and has electric current to flow through to zero potential contact 212 from source S, and the voltage UGS between grid G and source S is negative, PMOS The drain D of unit 310 is electrically connected with the first power supply interface 101 of bluetooth module 100, therefore PMOS units 310 are turned on, power supply The 400 PMOS units 310 by turning on are powered to bluetooth module 100, and bluetooth module 100 is in can working condition.

When be not inserted into COBBAIF 210 or from COBBAIF 210 extract audio frequency apparatus plug when, COBBAIF 210 the first contact 211 and zero potential contact 212 disconnect, and are flowed through to the no current of zero potential contact 212 from source S, grid G with Voltage UGS between source S is turned off for 0, PMOS units 310.First power supply interface 101 and the power supply 400 of bluetooth module 100 Positive pole disconnects, and bluetooth module 100 can not start or the power down of bluetooth module 100 is stopped.

In sum, the Bluetooth audio frequency circuit in the present embodiment can be realized：Set when audio is not inserted into COBBAIF 210 During standby plug, bluetooth module 100 can not start；When the plug of audio frequency apparatus is extracted from COBBAIF 210, bluetooth module 100 power down are stopped；So as to avoid not using Bluetooth audio frequency device mistiming from Bluetooth audio frequency device is started shooting power consumption by switch, or Audio is commenced play out, is caused inconvenience to the user.

It should be noted that the PMOS units 310 described in present specification can be PMOS, or by discrete unit The switching device turned on by negative pressure that part such as triode etc. is built, or including by PMOS and related protection device, drive The integration module of dynamic device.Although these PMOS units 310 there are different implementations, for ease of understanding, PMOS is analogous to, PMOS units 310 all have grid G, source S and drain D.Voltage UGS between grid G and source S for it is negative when, source S and leakage Pole D is turned on.

Embodiment two：

Bluetooth audio frequency circuit as shown in Figure 2, bluetooth module includes chip U1, it is preferred that chip U1 models F3188_ CSR8645；Audio-frequency module includes chip U2, it is preferred that chip U2 models TPA6132A2；PMOS units include PMOS Q1, Concrete model can be FS2301.

Chip U1 and chip U2 is electrically connected with by BT_SPLP, BT_SPLN, BT_SPRP, BT_SPRN, and chip U1 is to core Piece U2 sends audio signal；Chip U1 is also electrically connected with electret microphone input circuit as shown in Figure 3, to realize bluetooth Hand-free call function.

COBBAIF includes the first contact GK and zero potential contact GND, also including for earphone horn or buzzer etc. The first output contact L and the second output contact R of audio signal.First contact GK and zero potential contact GND It can also be the input of microphone.When the plug of audio frequency apparatus is inserted in COBBAIF, the first contact GK and zero potential contact GND is electrically connected with.

The grid G of PMOS Q1 is electrically connected with the first contact GK, and source S is connected with the positive pole BAT+ of battery BA, drain D The first power supply interface (pin 15) with chip U1 is electrically connected with.

Used as further improvement of the utility model, first power supply interface of the chip U1 of bluetooth module is switch interface The drain D of POWER_ON, switch interface POWER_ON and PMOS Q1 is connected and turned off by switching K.Inserted in COBBAIF After entering the plug of audio frequency apparatus, PMOS Q1 conductings, BAT_VCC is high level, and Push switch K makes its coupling cock interface The drain D of POWER_ON and PMOS Q1, chip U1 start operations.

And work as the plug that audio frequency apparatus is not inserted into COBBAIF, and AC5V_IN be low level constantly, PMOS Q1 is closed Disconnected, Push switch K can not make chip U1 start operations.

When the plug of audio frequency apparatus is not inserted into COBBAIF, the chip U1 of bluetooth module can not start；When from audio When the plug of audio frequency apparatus is extracted in interface, chip U1 power down is stopped；So as to avoid not using Bluetooth audio frequency device mistiming Make the start power consumption of Bluetooth audio frequency device by switch, or commence play out audio, cause inconvenience to the user.

Further, the power supply interface BAT_VCC of the chip U2 in audio-frequency module is also electrically connected at the drain electrode of PMOS Q1 D, when the plug of audio frequency apparatus is not inserted into COBBAIF, chip U2 also shuts down simultaneously.Further make whole Bluetooth audio frequency circuit Power-off is out of service.

Used as further improvement of the utility model, Bluetooth audio frequency circuit also includes charging inlet (not shown), charging The positive pole input of mouth is AC5V_IN, and switch module also includes controllable switch element Q2, the positive pole input AC5V_IN of charging inlet Control pin B with controllable switch element Q2 is electrically connected with, and the input C of controllable switch element Q2 is electrically connected at PMOS Q1 Source S, the output end E of controllable switch element Q2 is electrically connected at low level (ground connection).

The positive pole input AC5V_IN of charging inlet is high level, controllable switch element Q2 conductings, its input when charging Pressure drop very little between C and output end E, therefore input C is also close to zero potential.The positive pole BAT+ of battery BA is provided from PMOS Electric current of the source S of pipe Q1 to the input C of controllable switch element Q2.Due to the resistance between grid G and source S, voltage UGS It is negative, PMOS Q1 can also be turned on, BAT_VCC is high level, chip U1 and chip U2 can also start shooting operation.Sound is worked as in realization When the plug of audio frequency apparatus is not inserted into frequency interface, Bluetooth audio frequency circuit can also start shooting.

Specifically, controllable switch element Q2 is NPN type triode (such as 8050C), specifically, the base stage B of NPN type triode Positive pole AC5V_IN with charging inlet is electrically connected with, and the colelctor electrode C of NPN type triode is electrically connected at the source electrode of PMOS Q1 The emitter E of S, controllable switch element Q2 is electrically connected at low level (ground connection).

Used as further improvement of the utility model, the positive pole AC5V_IN of charging inlet is connected to the core in bluetooth module The charging inlet (pin 12) of piece U1, realizes charging battery BA.

Preferably, the chip U1 in the bluetooth module also includes battery detecting interface (pin 19), battery detecting interface It is connected to the positive pole of battery BA.Can realize alerting the detection of battery BA electricity and low battery.

Embodiment three：

The utility model additionally provides Bluetooth audio frequency device, including the Bluetooth audio frequency circuit described in any of the above-described.

Bluetooth audio frequency device as shown in Figures 4 and 5, including circuit board 10, the first housing 20 and the second housing 30, circuit board 10 are located in the space that the first housing 20 and the second housing 30 are constituted.Circuit board 10 is provided with button 11, audio sockets 12, charges Socket 13 and battery 14.Button 11 preferably can be four pin button switches, can be fixed on circuit board 10 with stronger； Audio sockets 12 can be quadrupole straight cutting earphone socket；Charging socket 13 can be microUSB sockets；Battery 14 can be Lithium battery.First housing 20 is provided with the portion of pressing 21, and it is corresponding with the position of button 11 to press portion 21, is made by the portion of pressing 21 Button 11 is connected or disconnected.Second housing 30 is provided with audio jack 32 and charging jacks 33, audio jack 32, charging jacks 33 Position of the position respectively with audio sockets 12, charging socket 13 it is corresponding.

When the plug of audio frequency apparatus is not inserted into audio sockets 12, the bluetooth module in Bluetooth audio frequency circuit can not be opened It is dynamic；When the plug of audio frequency apparatus is extracted from audio sockets 12, bluetooth module power down is stopped；So as to avoid not using indigo plant Tooth audio devices mistiming makes the start power consumption of Bluetooth audio frequency device by switch, or commences play out audio, causes inconvenience to the user.

After bluetooth module works on power, can be by the end product with Bluetooth function (such as:Mobile phone, PC, PAD etc.) with Pairing connection；After successful matching.Audio above playback terminal, can just be transmitted to audio mould voice data by bluetooth Block, the bluetooth module in Bluetooth audio frequency device converts the data into audio signal, then is broadcast by playback equipments such as earphone or audio amplifiers Put.

It should be noted that " first " and " second " that the utility model is related to is only used for distinguishing different parts, do not possess Distinguish sequential action；" electric connection " is referred between the positions such as electrical equipment, pin, contact can be with circulating current including straight Connect in succession, also including the connection by devices such as resistance, inductance, electric capacity.

For a person skilled in the art, technical scheme that can be as described above and design, make other each Plant corresponding change and deform, and all these changes and deforms the guarantor that should all belong to the utility model claim Within the scope of shield.

Claims (10)

1. Bluetooth audio frequency circuit, including the bluetooth module and audio-frequency module being electrically connected with, the audio-frequency module is used to process described The audio signal that bluetooth module is received, the audio-frequency module includes COBBAIF, it is characterised in that：The COBBAIF includes the One contact and zero potential contact, when audio device plug accesses the COBBAIF, first contact and zero potential contact Connection；

The Bluetooth audio frequency circuit also includes switch module, and the switch module includes PMOS units, the grid of the PMOS units Pole is electrically connected with first contact, and the source electrode of the PMOS units is connected with the positive pole of power supply, the leakage of the PMOS units Pole is electrically connected with the first power supply interface of the bluetooth module.

2. Bluetooth audio frequency circuit as claimed in claim 1, it is characterised in that：The switch interface of the bluetooth module with it is described The drain electrode of PMOS units is by switching connection and turning off.

3. Bluetooth audio frequency circuit as claimed in claim 1, it is characterised in that：The drain electrode of the PMOS units is also electrically connected at The power supply interface of the audio-frequency module.

4. Bluetooth audio frequency circuit as claimed in claim 1, it is characterised in that：Also include charging inlet, the switch module is also Including controllable switch element, the positive pole of the charging inlet is electrically connected with the control pin of the controllable switch element, described The input of controllable switch element is electrically connected at the source electrode of the PMOS units, the output termination of the controllable switch element Ground.

5. Bluetooth audio frequency circuit as claimed in claim 4, it is characterised in that：The controllable switch element is NPN type triode, Specifically, the base stage of NPN type triode is electrically connected with the positive pole of the charging inlet, the colelctor electrode of the NPN type triode It is electrically connected at the source electrode of the PMOS units, the grounded emitter of the NPN type triode.

6. Bluetooth audio frequency circuit as claimed in claim 4, it is characterised in that：The positive pole of the charging inlet is connected to the indigo plant The charging inlet of tooth module.

7. Bluetooth audio frequency circuit as claimed in claim 1, it is characterised in that：The battery detecting interface connection of the bluetooth module In the positive pole of the power supply.

8. the Bluetooth audio frequency circuit as any one of claim 1-7, it is characterised in that：The bluetooth module includes F3188_CSR8645 chips.

9. the Bluetooth audio frequency circuit as any one of claim 1-7, it is characterised in that：The audio-frequency module includes TPA6132A2 chips.

10. Bluetooth audio frequency device, it is characterised in that：Including Bluetooth audio frequency circuit as claimed in any one of claims 1-9 wherein.