CN213186519U - Bluetooth headset drive circuit - Google Patents
Bluetooth headset drive circuit Download PDFInfo
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- CN213186519U CN213186519U CN202021654679.3U CN202021654679U CN213186519U CN 213186519 U CN213186519 U CN 213186519U CN 202021654679 U CN202021654679 U CN 202021654679U CN 213186519 U CN213186519 U CN 213186519U
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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 relates to a bluetooth headset technical field discloses a bluetooth headset drive circuit that the consumption is less and data transmission efficiency is higher, possesses: a signal output circuit (200); the main control circuit (100) is used for processing audio signals input by external equipment, and the Bluetooth antenna (102) is configured in the driving circuit and used for receiving the audio signals input by the external equipment; a signal input end of the controller (U101) is coupled to the signal output end of the Bluetooth antenna (102) and is used for receiving and processing the audio signal; the signal input end of the signal output circuit (200) is connected with the signal output end of the controller (U101), and when the controller (U101) inputs a high level to the signal output circuit (200), the high level is used for triggering the signal output circuit (200) to work so as to output an audio signal.
Description
Technical Field
The utility model relates to a bluetooth headset technical field, more specifically say, relate to a bluetooth headset drive circuit.
Background
Bluetooth is a radio technology supporting short-range communication (generally within 10 m) of devices, and can perform wireless information exchange between devices such as mobile phones, wireless headsets, notebook computers and the like. At present, the main working range of the bluetooth technology is about 10 meters, and in the connection and data transmission process of bluetooth, the data transmission efficiency of the bluetooth headset is low due to the large power consumption of the driving circuit.
Therefore, how to improve the efficiency of data transmission becomes a technical problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned of prior art because drive circuit's consumption is great, the lower defect of data transmission efficiency that leads to bluetooth headset provides the less and higher bluetooth headset drive circuit of data transmission efficiency of a consumption.
The utility model provides a technical scheme that its technical problem adopted is: a Bluetooth headset drive circuit is provided with:
a signal output circuit;
a main control circuit configured in the driving circuit for processing the audio signal input by the external device,
the main control circuit comprises a controller and a Bluetooth antenna,
the Bluetooth antenna is configured in the driving circuit and used for receiving audio signals input by external equipment;
a signal input end of the controller is coupled to the signal output end of the Bluetooth antenna and used for receiving and processing the audio signal;
the signal input end of the signal output circuit is connected with the signal output end of the controller,
when the controller inputs a high level to the signal output circuit, the high level is used for triggering the signal output circuit to work so as to output the audio signal.
In some embodiments, the main control circuit further comprises an FM antenna for receiving an audio signal input by an external device;
and the signal output end of the FM antenna is connected with the other signal input end of the controller, and the FM antenna inputs the received audio signal into the controller.
In some embodiments, the FM antenna comprises a first capacitor, a first inductor, and a second capacitor, wherein the first inductor is connected in parallel with the second capacitor,
the first capacitor is connected in series with the first inductor and the second capacitor connected in parallel,
one end of the first capacitor, one end of the first inductor and one end of the second capacitor are respectively connected with the other signal input end of the controller.
In some embodiments, the main control circuit further comprises a crystal oscillator, a sixth capacitor and a seventh capacitor,
the sixth capacitor is connected in parallel with the seventh capacitor,
one end of the crystal oscillator, one end of the sixth capacitor and one end of the seventh capacitor are respectively connected with a clock signal end of the controller,
the other ends of the crystal oscillator, the sixth capacitor and the seventh capacitor are respectively connected with the other clock signal end of the controller.
In some embodiments, the signal output circuit includes a first audio power amplifier and a second audio power amplifier,
the signal input end of the first audio power amplifier is connected with a signal output end of the controller;
and the signal input end of the second audio power amplifier is connected with the other signal output end of the controller.
In some embodiments, the signal output circuit further comprises an eleventh capacitor, a fourth resistor and a twelfth capacitor connected in sequence,
one end of the eleventh capacitor is connected with a signal output end of the controller;
one end of the twelfth capacitor is connected with the signal input end of the first audio power amplifier.
In some embodiments, the signal output circuit further comprises a sixteenth capacitor, a tenth resistor and a seventeenth capacitor connected in sequence,
one end of the sixteenth capacitor is connected with the other signal output end of the controller;
one end of the seventeenth capacitor is connected with the signal input end of the second audio power amplifier.
The bluetooth headset driving circuit of the present invention comprises a signal output circuit and a main control circuit, wherein the main control circuit comprises a controller and a bluetooth antenna, the bluetooth antenna is used for receiving audio signals input by external devices, and the controller is used for receiving and processing the audio signals; when the controller inputs a high level to the signal output circuit, the high level is used for triggering the signal output circuit to work so as to output an audio signal. Compared with the prior art, the controller outputs the level signal to control the signal output circuit to work or stop, and then the problem that the data transmission efficiency of the Bluetooth headset is low due to the fact that the power consumption of the driving circuit is large in the data transmission process of the Bluetooth is solved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a main control circuit diagram according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a signal output circuit according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, in the first embodiment of the bluetooth headset driving circuit of the present invention, the bluetooth headset driving circuit includes a main control circuit 100 and a signal output circuit 200.
The main control circuit 100 includes a controller U101, an FM antenna 101, and a bluetooth antenna 102.
Specifically, the controller U101 has functions of logic operation, instruction transmission, and audio acquisition.
For example, the highest transmission frequency of the BT-RF interface of the controller U101 may reach 6MHz, and when the controller U101 transmits a voice signal, it sets the frame synchronization signal to 8KHz, which coincides with the sampling frequency of the audio AD.
The FM antenna 101 is used to receive an FM frequency modulation broadcast signal (audio signal).
Bluetooth antenna 102 can convert guided waves traveling on a transmission line into electromagnetic waves traveling in an unbounded medium, or vice versa.
Specifically, the main control circuit 100 is configured in the driving circuit, and is used for processing an audio signal input by an external device (e.g., a mobile phone, a tablet), which is to be understood as converting an input analog signal into a digital signal or converting a digital signal into an analog signal.
Further, the bluetooth antenna 102 is disposed in a driving circuit (i.e., a bluetooth headset) for receiving an audio signal (electromagnetic wave signal) input by an external device and then outputting the audio signal (electromagnetic wave signal) to the controller U101.
A signal input terminal (corresponding to the BT-RF terminal) of the controller U101 is connected to a signal output terminal of the bluetooth antenna 102, and is configured to receive the audio signal input by the bluetooth antenna 102 and then perform processing.
A signal input terminal (corresponding to DACL and DACR terminals) of the signal output circuit 200 is connected to a signal output terminal (corresponding to pins 6 and 7) of the controller U101.
It should be noted that the other signal input terminal (corresponding to the MUTE terminal) of the signal output circuit 200 is connected to the signal output terminal (corresponding to pin 1) of the controller U101.
When the controller U101 inputs a high level for triggering the operation of the signal output circuit 200 to the other signal input terminal (corresponding to the MUTE terminal) of the signal output circuit 200, the signal output circuit 200 outputs an audio signal processed by the controller U101.
By using the technical scheme, the controller U101 outputs a level signal (namely, a high level or a low level) to control the work or stop of the signal output circuit 200, on one hand, when the controller U101 outputs the processed data to the Bluetooth headset from the coding interface, the interface of the controller U101 can provide a duplex serial port, so that the communication (namely, data transmission) is facilitated; on the other hand, the controller U101 can also provide data buffering to reduce the power consumption of the driving circuit itself, and further solve the problem that the data transmission efficiency is low due to excessive power consumption in the data transmission process of bluetooth.
In some embodiments, the main control circuit 100 further includes an FM antenna 101, wherein the FM antenna 101 is configured to receive an audio signal (electromagnetic wave signal) input by an external device (a mobile phone or a tablet computer).
Specifically, a signal output terminal of the FM antenna 101 is connected to another signal input terminal (corresponding to the FMIP terminal) of the controller U101, which inputs the received audio signal to the controller U101.
In some embodiments, in order to improve the quality of the input audio signal, a first capacitor C101, a first inductor L101, and a second capacitor C102 may be disposed in the FM antenna 101, wherein the first inductor L101 is connected in parallel with the second capacitor C102.
The first capacitor C101 is connected in series with the first inductor L101 and the second capacitor C102 connected in parallel.
One end of the first capacitor C101, one end of the first inductor L101, and one end of the second capacitor C102 are respectively connected to another signal input end (corresponding to the FMIP end) of the controller U101, that is, an audio signal input by an external device is processed by the first capacitor C101, the first inductor L101, and the second capacitor C102 and then input to the controller U101.
In some embodiments, in order to improve the stability of the operation of the controller U101, a crystal oscillator Y101, a sixth capacitor C106, and a seventh capacitor C107 may be disposed in the main control circuit 100, wherein the crystal oscillator Y101 is used for generating a pulse clock signal.
Specifically, the sixth capacitance C106 is connected in parallel with the seventh capacitance C107.
One end of the crystal oscillator Y101, one end of the sixth capacitor C106, and one end of the seventh capacitor C107 are respectively connected to a clock signal end (BT-OSCO end) of the controller U101.
The other ends of the crystal oscillator Y101, the sixth capacitor C106 and the seventh capacitor C107 are respectively connected to the other clock signal end (BT-OSCI end) of the controller U101.
That is, the clock pulses generated by the crystal oscillator Y101 are respectively applied to the clock signal terminals of the controller U101 to provide pulse signals for the controller U101 to operate.
In some embodiments, in order to increase the gain multiple of the audio signal, a first audio power amplifier U201 and a second audio power amplifier U202 may be disposed in the signal output circuit 200, wherein the audio power amplifiers have EMI suppression capability, can greatly reduce the EMI interference in the bandwidth range, and also have a signal amplification function.
Specifically, a signal input terminal (corresponding to the IN-terminal) of the first audio power amplifier U201 is connected to a signal output terminal (corresponding to the DACL terminal) of the controller U201.
The signal input terminal (corresponding to the IN-terminal) of the second audio power amplifier U202 is connected to another signal output terminal (corresponding to the DACR terminal) of the controller.
Specifically, the audio signal output by the controller U201 is divided into two paths, one path is input to the first audio power amplifier U201, and the input audio signal is processed by the first audio power amplifier U201 and then output; the other input is a second audio power amplifier U202.
In some embodiments, in order to improve the performance of the signal output circuit 200, an eleventh capacitor C202, a fourth resistor R204, and a twelfth capacitor C203 may be disposed in the signal output circuit 200, wherein the eleventh capacitor C202, the fourth resistor R204, and the twelfth capacitor C203 are connected in sequence.
Specifically, one end of the eleventh capacitor C202 is connected to a signal output end (corresponding to the DACL end) of the controller U101, and one end of the twelfth capacitor C203 is connected to a signal input end (corresponding to the IN-end) of the first audio power amplifier U201, that is, one audio signal output by the controller U101 is input to the first audio power amplifier U201 through the eleventh capacitor C202, the fourth resistor R204 and the twelfth capacitor C203.
In some embodiments, in order to improve the performance of the signal output circuit 200, a sixteenth capacitor C207, a tenth resistor R210 and a seventeenth capacitor C208 may be disposed in the signal output circuit 200, wherein the sixteenth capacitor C207, the tenth resistor R210 and the seventeenth capacitor C208 are connected in sequence.
Specifically, one end of the sixteenth capacitor C207 is connected to another signal output end (corresponding to the DACR end) of the controller U101, and one end of the seventeenth capacitor C208 is connected to a signal input end (corresponding to the IN-end) of the second audio power amplifier U202, that is, another audio signal output by the controller U101 is input to the second audio power amplifier U202 through the sixteenth capacitor C207, the tenth resistor R210 and the seventeenth capacitor C208.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (7)
1. The utility model provides a bluetooth headset drive circuit which characterized in that possesses:
a signal output circuit;
a main control circuit configured in the driving circuit for processing the audio signal input by the external device,
the main control circuit comprises a controller and a Bluetooth antenna,
the Bluetooth antenna is configured in the driving circuit and used for receiving audio signals input by external equipment;
a signal input end of the controller is coupled to the signal output end of the Bluetooth antenna and used for receiving and processing the audio signal;
the signal input end of the signal output circuit is connected with the signal output end of the controller,
when the controller inputs a high level to the signal output circuit, the high level is used for triggering the signal output circuit to work so as to output the audio signal.
2. The Bluetooth headset driver circuit of claim 1,
the main control circuit further comprises an FM antenna, and the FM antenna is used for receiving audio signals input by external equipment;
and the signal output end of the FM antenna is connected with the other signal input end of the controller, and the FM antenna inputs the received audio signal into the controller.
3. The Bluetooth headset driver circuit of claim 2,
the FM antenna comprises a first capacitor, a first inductor and a second capacitor, wherein the first inductor is connected with the second capacitor in parallel,
the first capacitor is connected in series with the first inductor and the second capacitor connected in parallel,
one end of the first capacitor, one end of the first inductor and one end of the second capacitor are respectively connected with the other signal input end of the controller.
4. The Bluetooth headset driver circuit of claim 2,
the main control circuit also comprises a crystal oscillator, a sixth capacitor and a seventh capacitor,
the sixth capacitor is connected in parallel with the seventh capacitor,
one end of the crystal oscillator, one end of the sixth capacitor and one end of the seventh capacitor are respectively connected with a clock signal end of the controller,
the other ends of the crystal oscillator, the sixth capacitor and the seventh capacitor are respectively connected with the other clock signal end of the controller.
5. The Bluetooth headset driver circuit of claim 1,
the signal output circuit comprises a first audio power amplifier and a second audio power amplifier,
the signal input end of the first audio power amplifier is connected with a signal output end of the controller;
and the signal input end of the second audio power amplifier is connected with the other signal output end of the controller.
6. The Bluetooth headset driver circuit of claim 5,
the signal output circuit also comprises an eleventh capacitor, a fourth resistor and a twelfth capacitor which are connected in sequence,
one end of the eleventh capacitor is connected with a signal output end of the controller;
one end of the twelfth capacitor is connected with the signal input end of the first audio power amplifier.
7. The Bluetooth headset driver circuit of claim 5,
the signal output circuit also comprises a sixteenth capacitor, a tenth resistor and a seventeenth capacitor which are connected in sequence,
one end of the sixteenth capacitor is connected with the other signal output end of the controller;
one end of the seventeenth capacitor is connected with the signal input end of the second audio power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021654679.3U CN213186519U (en) | 2020-08-10 | 2020-08-10 | Bluetooth headset drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021654679.3U CN213186519U (en) | 2020-08-10 | 2020-08-10 | Bluetooth headset drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213186519U true CN213186519U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021654679.3U Active CN213186519U (en) | 2020-08-10 | 2020-08-10 | Bluetooth headset drive circuit |
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| Country | Link |
|---|---|
| CN (1) | CN213186519U (en) |
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2020
- 2020-08-10 CN CN202021654679.3U patent/CN213186519U/en active Active
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