CN202998084U - Bluetooth device circuit - Google Patents
Bluetooth device circuit Download PDFInfo
- Publication number
- CN202998084U CN202998084U CN2012207342400U CN201220734240U CN202998084U CN 202998084 U CN202998084 U CN 202998084U CN 2012207342400 U CN2012207342400 U CN 2012207342400U CN 201220734240 U CN201220734240 U CN 201220734240U CN 202998084 U CN202998084 U CN 202998084U
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- circuit board
- fpc
- fpc circuit
- inductance
- bluetooth
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Abstract
The utility model provides a bluetooth device circuit. An appropriate inductor is connected with a grounding wire on one end of an FPC circuit board close to a welding position in series or an appropriate inductor is connected between the welding position and a stratum or the grounding wire on one end of the FPC circuit board close to the welding position in series, so that interference of the FPC circuit board on a bluetooth antenna is minimum and an effect of the FPC circuit board on the bluetooth antenna is effectively reduced. Because an original plate layer structure of the FPC circuit board isn't changed, an excellent mechanical performance of the FPC circuit board is maintained.
Description
Technical field
The utility model relates to the Bluetooth technology field, relates in particular to a kind of bluetooth equipment circuit.
Background technology
The design of the bluetooth equipments such as present bluetooth earphone, mobile phone often uses the FPC circuit, and the FPC circuit replaces hardboard PCB to be used for keypress function, MIC connection etc. usually.
Figure 1A is depicted as a kind of circuit diagram of bluetooth earphone, and by golden finger 104 welding, ground wire 103 and holding wire on the FPC circuit board all adopt the mode of walking separately single line to FPC circuit board 101 with PCB circuit main board 100.Due to small-sized bluetooth equipment, as bluetooth earphone etc., be designed in very little space, the Bluetooth antenna of bluetooth equipment is very sensitive to the structure of earphone inside, thereby the use of FPC circuit shown in Figure 1, be easy to make 2.4GHz noise jamming signal to enter the ground of PCB mainboard by the ground of coupling FPC circuit board, thereby Bluetooth antenna is produced coupling, weaken sensitivity and the transmitting power of Bluetooth antenna, disturb Bluetooth antenna to receive the performance of 2.4GHz Bluetooth signal.
Figure 1B is depicted as the circuit diagram of another kind of bluetooth earphone, wherein whole FPC circuit board 101 is carried out floor file and processes, and namely ground wire 103 is paved with other zones of FPC circuit board 101, thereby greatly reduces the FPC circuit to the impact of Bluetooth antenna.But owing to having carried out the floor file processing, its mechanical performance is bad, causes can often being fractureed in the process of bluetooth earphone Batch assemblage.
Therefore, need a kind of bluetooth equipment circuit, can avoid defects.
The utility model content
The purpose of this utility model is to provide a kind of bluetooth equipment circuit, not only can effectively reduce the FPC circuit board to the impact of Bluetooth antenna, and keeps the good mechanical performance of FPC circuit board.
For addressing the above problem, the utility model provides a kind of bluetooth equipment circuit, comprising: PCB circuit main board, FPC circuit board, inductance and Bluetooth antenna; Described Bluetooth antenna connects described PCB circuit main board, an end welding conducting of an end of described FPC circuit board and PCB circuit main board; Described inductance is arranged on described FPC circuit board near an end of weld and is connected on the ground wire of described FPC circuit board, perhaps is arranged on described PCB circuit main board near an end of weld and is connected between the ground wire or stratum and weld of described PCB circuit main board.
Further, an end that is used for welding on described FPC circuit board is provided with the golden finger that connects ground wire, an end that is used for welding on described PCB circuit main board is provided with pad, and an end of described FPC circuit board and an end of PCB circuit main board are by golden finger and pad welding conducting.
Further, the resonance frequency of described inductance is 2.4GHz.
Further, the sense value of described inductance is 29nH ~ 34nH.
Further, described FPC circuit board also comprises signal transmssion line, and the ground wire of described signal transmssion line and described FPC circuit board is at same layer or different layers.
Compared with prior art, the bluetooth equipment circuit that the utility model provides, by described FPC circuit board near the ground wire of an end of weld on series connection one suitable inductance, perhaps at described PCB circuit main board near the suitable inductance of connecting between the ground wire of an end of weld or stratum and weld, make the FPC circuit board minimum to the interference of Bluetooth antenna, effectively reduce the FPC circuit board to the impact of Bluetooth antenna, and owing to not changing the original layer structure of FPC circuit board, thereby keep the good mechanical performance of FPC circuit board.
Description of drawings
Figure 1A is the circuit diagram of a kind of bluetooth earphone of the prior art.
Figure 1B is the circuit diagram of another kind of bluetooth earphone of the prior art.
Fig. 2 A is the vertical view of the bluetooth equipment circuit of the utility model one embodiment.
Fig. 2 B is that the bluetooth equipment circuit shown in Fig. 2 A is along the cross-sectional view of AA ' line.
Fig. 3 is according to a kind of FPC of inhibition circuit board of the bluetooth equipment circuit shown in Fig. 2 A method flow diagram on the Bluetooth antenna impact.
Fig. 4 A is the vertical view of the bluetooth equipment circuit of another embodiment of the utility model.
Fig. 4 B is that the bluetooth equipment circuit shown in Fig. 4 A is along the cross-sectional view of AA ' line.
Fig. 5 is according to a kind of inhibition FPC circuit board of the bluetooth equipment circuit shown in Fig. 4 A method flow diagram on the Bluetooth antenna impact.
Embodiment
Core concept of the present utility model is to disclose a kind of bluetooth equipment circuit and a kind of FPC of inhibition circuit board to the method for Bluetooth antenna impact, by increased an inductance in existing bluetooth equipment circuit, rather than use floor file, when guaranteeing bluetooth equipment circuit antenna performance, can also guarantee the mechanical strength of FPC circuit board, circuit is simple, and successful is applicable to as bluetooth earphone, has the making of the miniaturization bluetooth equipments such as small handsets of Bluetooth function.
Described bluetooth equipment circuit comprises: PCB circuit main board, FPC circuit board, inductance and Bluetooth antenna; Described Bluetooth antenna connects described PCB circuit main board, an end welding conducting of an end of described FPC circuit board and PCB circuit main board; Described inductance is arranged on described FPC circuit board near an end of weld and is connected on the ground wire of described FPC circuit board, perhaps is arranged on described PCB circuit main board near an end of weld and is connected between the ground wire and weld of described PCB circuit main board.
Described inhibition FPC circuit board comprises the following steps the method for Bluetooth antenna impact: described Bluetooth antenna connects a PCB circuit main board; One end welding conducting of one end of described FPC circuit board and PCB circuit main board; An end at the close weld of described FPC circuit board arranges inductance, and described inductance is connected on the ground wire of described FPC circuit board; Perhaps the end at the close weld of described PCB circuit main board arranges inductance, and described inductance is connected between the ground wire and weld of described PCB circuit main board.
For the purpose of this utility model, feature are become apparent, below in conjunction with accompanying drawing, embodiment of the present utility model is further described, yet the utility model can be realized with different forms, should not think just to be confined to described embodiment.
Embodiment one: please refer to Fig. 2 A and 2B, the present embodiment provides a kind of bluetooth equipment circuit, comprising: PCB circuit main board 200, FPC circuit board 201, inductance 205 and Bluetooth antenna (not shown); Described Bluetooth antenna connects described PCB circuit main board 200.
In the present embodiment, described FPC circuit board 201 is single-sided circuit board, signal transmssion line 202 and ground wire 203 are arranged on the same layer of the same face, and an end of FPC circuit board 201 is used for welding PCB circuit main board 200, is provided with the golden finger 204 that is connected with signal transmssion line 202, ground wire 203 at this end; PCB circuit main board 200 is used for an end of welding FPC circuit board 201, is provided with pad 200a corresponding to golden finger 204 positions, and the respective end of FPC circuit board 201 and PCB circuit main board 200 is by golden finger 204 and pad 200a welding conducting.
In the present embodiment, described inductance 205 is arranged on described FPC circuit board 201 near an end of weld, and is connected on the ground wire of described FPC circuit board, i.e. the position of close golden finger 204 on FPC circuit board 201, disconnect ground wire 203, place a suitable inductance 205.wherein, the resonance frequency of inductance 205 is 2.4GHz, its sense value is determined according to actual conditions, specifically, can be by accessing the not inductance of same feeling value at ground wire 203 places, detect the performance that Bluetooth antenna receives signal, after the inductance access with suitable sense value, this inductance is maximum to the impedance of 2.4GHZ signal in the inductance that all accessed, after the noise signal of 2.4GHZ is come in by ground wire 203 couplings of FPC circuit board 201, this inductance is the highest to its absorbability, absorb even fully, and then the noise signal that greatly reduces 2.4GHZ receives the interference of signal to Bluetooth antenna, therefore, inductance with suitable sense value makes the FPC circuit board minimum to the interference of Bluetooth antenna, effectively reduce the FPC circuit board to the impact of Bluetooth antenna, and owing to not changing the original veneer structure of FPC circuit board, also do not adopt ground wire floor file structure, thereby keep the good mechanical performance of FPC circuit board.
Preferably, the sense value of described inductance 205 is 29nH ~ 34nH, is for example 30nH, 31nH, 32nH, 33nH.
For example, for identical antenna, when not accessing inductance, the detection sensitivity of three positions on one 2D plane-4.09/-3.14/-3.02(dB), when the inductance of access 33nH, rise to-3.45/-2.97/-3.32(dB).
Please refer to Fig. 3, the present embodiment also provides the method for a kind of FPC of inhibition circuit board on the Bluetooth antenna impact, comprises the following steps: S301, and described Bluetooth antenna connects a PCB circuit main board; S302, an end welding conducting of an end of described FPC circuit board and PCB circuit main board; S303 arranges inductance at described FPC circuit board near an end of weld, and described inductance is connected on the ground wire of described FPC circuit board.Wherein, at step S302, in, an end of described FPC circuit board comprises with the process of an end welding conducting of PCB circuit main board: an end setting that is used for welding on described FPC circuit board is connected the golden finger of ground wire; An end that is used for welding on described PCB circuit main board arranges pad; Described golden finger and pad welding make an end conducting of an end and the PCB circuit main board of described FPC circuit board.
Need to prove, the order of step S301 to S303, be not limited to said sequence, also can arbitraryly change, as long as can realize that described Bluetooth antenna connects an end of described PCB circuit main board, described FPC circuit board and an end welding conducting and the described inductance of PCB circuit main board is arranged on described FPC circuit board near an end of weld and is connected on the ground wire of described FPC circuit board.The method of the inhibition FPC circuit board of the present embodiment on the Bluetooth antenna impact, do not change the original layer structure of original FPC circuit board, also do not make the FPC ground wire into the floor file structure, just can suppress well the FPC circuit board affects Bluetooth antenna, method is simple, successful.
the bluetooth equipment circuit that the present embodiment provides and the inhibition FPC circuit board method on the Bluetooth antenna impact, by described FPC circuit board near the ground wire of an end of weld on suitable inductance of series connection, make the FPC circuit board minimum to the interference of Bluetooth antenna, effectively reduce the FPC circuit board to the impact of Bluetooth antenna, and owing to not changing the original layer structure of FPC circuit board, thereby the good mechanical performance of maintenance FPC circuit board, circuit is simple, successful, be applicable to as bluetooth earphone, making with miniaturization bluetooth equipments such as small handsets of Bluetooth function.
Embodiment two: please refer to Fig. 4 A and 4B, the present embodiment provides a kind of bluetooth equipment circuit, comprising: PCB circuit main board 400, FPC circuit board 401, inductance 405 and Bluetooth antenna (not shown); Described Bluetooth antenna connects described PCB circuit main board 400.
In the present embodiment, described FPC circuit board 401 is single-sided circuit board, signal transmssion line 402 and ground wire 403 are arranged on the same layer of the same face, and an end of FPC circuit board 401 is used for welding PCB circuit main board 400, is provided with the golden finger 404 that is connected with signal transmssion line 402, ground wire 203 at this end; PCB circuit main board 400 is used for an end of welding FPC circuit board 401, is provided with pad 400a corresponding to golden finger 404 positions, and the respective end of FPC circuit board 401 and PCB circuit main board 400 is by golden finger 404 and pad 400a welding conducting.
In the present embodiment, described inductance 405 is arranged on described PCB circuit main board 400 near an end of weld, and be connected between the ground wire or stratum 406 and weld of described PCB circuit main board 400, namely on PCB circuit main board 400 near the position of pad 400a, place a suitable inductance 405, at this moment, after the pad 400a of ground wire 403 by golden finger 404 and PCB circuit main board 400 of FPC circuit board 401, turn back to ground wire or the stratum 406 of PCB circuit board through inductance 405.wherein, the resonance frequency of inductance 405 is 2.4GHz, its sense value is determined according to actual conditions, specifically, can be by access the not inductance of same feeling value between the lead-in wire of the lead-in wire of the pad 400a of PCB circuit main board 400 and ground wire 406, detect the performance that Bluetooth antenna receives signal, after the inductance access with suitable sense value, this inductance is maximum to the impedance of 2.4GHZ signal in the inductance that all accessed, and then after the noise signal of 2.4GHZ is come in by ground wire 203 couplings of FPC circuit board 201, this inductance is the highest to its absorbability, absorb even fully, and then the noise signal that greatly reduces 2.4GHZ receives the interference of signal to Bluetooth antenna, therefore, inductance with suitable sense value makes the FPC circuit board minimum to the interference of Bluetooth antenna, effectively reduce the FPC circuit board to the impact of Bluetooth antenna, and owing to not changing the original veneer structure of FPC circuit board, also do not adopt ground wire floor file structure, thereby keep the good mechanical performance of FPC circuit board.
Preferably, the sense value of described inductance 405 is 29nH ~ 34nH, is for example 30nH, 31nH, 32nH, 33nH.
For example, for identical antenna, when not accessing inductance, the detection sensitivity of three positions on one 2D plane--5.47/-6.15/-7.47(dB), when the inductance of access 33nH, rise to-365/-337/-378(dB).
Need to prove, FPC circuit board of the present utility model is not limited to the layer structure of above-mentioned single-surface single-layer, it can be also the multilayer double-sided PCB, signal transmssion line and ground wire can be in the same face, also can be at coplanar not, also can be in the different layers of the same face, as long as at suitable inductance of the close golden finger of ground wire place's series connection.
Please refer to Fig. 5, the present embodiment also provides the method for a kind of FPC of inhibition circuit board on the Bluetooth antenna impact, comprises the following steps: S501, and described Bluetooth antenna connects a PCB circuit main board; S502, an end welding conducting of an end of described FPC circuit board and PCB circuit main board; S503 arranges inductance at described PCB circuit main board near an end of weld, and described inductance is connected between the ground wire and weld of described PCB circuit main board.
Wherein, at step S502, in, an end of described FPC circuit board comprises with the process of an end welding conducting of PCB circuit main board: an end setting that is used for welding on described FPC circuit board is connected the golden finger of ground wire; An end that is used for welding on described PCB circuit main board arranges pad; Described golden finger and pad welding make an end conducting of an end and the PCB circuit main board of described FPC circuit board.
Need to prove, the order of step S501 to S503, be not limited to said sequence, also can arbitraryly change, as long as can realize that described Bluetooth antenna connects an end of described PCB circuit main board, described FPC circuit board and an end welding conducting and the described inductance of PCB circuit main board is arranged on described PCB circuit board near an end of weld and is connected between the ground wire or stratum and weld of described PCB circuit main board.The method of the inhibition FPC circuit board of the present embodiment on the Bluetooth antenna impact, do not change the original layer structure of original FPC circuit board, also do not make the FPC ground wire into the floor file structure, just can suppress well the FPC circuit board affects Bluetooth antenna, method is simple, successful.
the bluetooth equipment circuit that the present embodiment provides and the inhibition FPC circuit board method on the Bluetooth antenna impact, by at described PCB circuit main board near the suitable inductance of connecting between the ground wire of an end of weld or stratum and weld, make the FPC circuit board minimum to the interference of Bluetooth antenna, effectively reduce the FPC circuit board to the impact of Bluetooth antenna, and owing to not changing the original layer structure of FPC circuit board, thereby the good mechanical performance of maintenance FPC circuit board, circuit is simple, successful, be applicable to as bluetooth earphone, making with miniaturization bluetooth equipments such as small handsets of Bluetooth function.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (5)
1. a bluetooth equipment circuit, is characterized in that, comprising: PCB circuit main board, FPC circuit board, inductance and Bluetooth antenna; Described Bluetooth antenna connects described PCB circuit main board, an end welding conducting of an end of described FPC circuit board and PCB circuit main board; Described inductance is arranged on described FPC circuit board near an end of weld and is connected on the ground wire of described FPC circuit board, perhaps is arranged on described PCB circuit main board near an end of weld and is connected between the ground wire or stratum and weld of described PCB circuit main board.
2. bluetooth equipment circuit as claimed in claim 1, it is characterized in that, an end that is used for welding on described FPC circuit board is provided with the golden finger that connects ground wire, an end that is used for welding on described PCB circuit main board is provided with pad, and an end of described FPC circuit board and an end of PCB circuit main board are by golden finger and pad welding conducting.
3. bluetooth equipment circuit as claimed in claim 1, is characterized in that, the resonance frequency of described inductance is 2.4GHz.
4. bluetooth equipment circuit as described in claim 1 or 3, is characterized in that, the sense value of described inductance is 29nH ~ 34nH.
5. bluetooth equipment circuit as claimed in claim 1, is characterized in that, described FPC circuit board also comprises signal transmssion line, and the ground wire of described signal transmssion line and described FPC circuit board is at same layer or different layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207342400U CN202998084U (en) | 2012-12-26 | 2012-12-26 | Bluetooth device circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207342400U CN202998084U (en) | 2012-12-26 | 2012-12-26 | Bluetooth device circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202998084U true CN202998084U (en) | 2013-06-12 |
Family
ID=48569209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207342400U Withdrawn - After Issue CN202998084U (en) | 2012-12-26 | 2012-12-26 | Bluetooth device circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202998084U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078653A (en) * | 2012-12-26 | 2013-05-01 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| WO2022088985A1 (en) * | 2020-10-28 | 2022-05-05 | 华为技术有限公司 | Electronic device, side-key fpc, and processing method for eliminating antenna clutter |
-
2012
- 2012-12-26 CN CN2012207342400U patent/CN202998084U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078653A (en) * | 2012-12-26 | 2013-05-01 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| CN103078653B (en) * | 2012-12-26 | 2015-04-22 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| WO2022088985A1 (en) * | 2020-10-28 | 2022-05-05 | 华为技术有限公司 | Electronic device, side-key fpc, and processing method for eliminating antenna clutter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130612 Effective date of abandoning: 20150422 |