CN215345007U - Stereo wireless Bluetooth headset control circuit and device - Google Patents
Stereo wireless Bluetooth headset control circuit and device Download PDFInfo
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- CN215345007U CN215345007U CN202121151703.6U CN202121151703U CN215345007U CN 215345007 U CN215345007 U CN 215345007U CN 202121151703 U CN202121151703 U CN 202121151703U CN 215345007 U CN215345007 U CN 215345007U
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Abstract
The utility model discloses a stereo wireless Bluetooth headset control circuit and a device, the stereo wireless Bluetooth headset control circuit comprises: the device comprises a Bluetooth main control module, a radio frequency input/output module, a power supply module, a charging control module, a microphone bias module, an audio amplification output module and an LED module; the Bluetooth master control module, the radio frequency input and output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively and electrically connected with the power supply module; the radio frequency input/output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively electrically connected with the Bluetooth master control module. The utility model can realize high-quality Bluetooth audio and data transmission and improve user experience.
Description
Technical Field
The utility model relates to the technical field of Bluetooth control, in particular to a stereo wireless Bluetooth headset control circuit and device.
Background
Bluetooth technology has been widely used in many electronic products due to its small size, powerful function, low cost and short-range wireless communication. Moreover, the characteristic of low radiation of the Bluetooth technology is called as 'green and healthy communication' technology by people. With the rapid development of mobile phones, computers, personal digital assistant devices and the internet, there is an increasing demand for the transfer of various data information. The closer combination of bluetooth technology with computer and mobile communication technology makes the bluetooth technology, bluetooth chip and bluetooth product to be greatly developed. The bluetooth earphone is a wireless voice communication device, and has the characteristics of low cost, low power, low radiation and short-distance wireless transmission of the bluetooth technology. However, the bluetooth headset of the prior art still has shortcomings in terms of voice transmission characteristics and function diversification. Therefore, it is an urgent need to solve the problem of the present invention to provide a stereo wireless bluetooth headset control circuit.
SUMMERY OF THE UTILITY MODEL
The present invention provides a stereo wireless bluetooth headset control circuit and device, which is designed to solve the above-mentioned problems in the prior art.
In a first aspect, the utility model discloses a stereo wireless Bluetooth headset control circuit, which comprises a Bluetooth main control module, a radio frequency input/output module, a power supply module, a charging control module, a microphone bias module, an audio amplification output module and an LED module; the Bluetooth master control module, the radio frequency input and output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively and electrically connected with the power supply module; the radio frequency input/output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively electrically connected with the Bluetooth master control module.
Preferably, the stereo wireless bluetooth headset control circuit further comprises a key module; the key module is respectively electrically connected with the power module and the Bluetooth master control module.
Preferably, the bluetooth master control module comprises a bluetooth control unit, a crystal oscillator unit, a FLASH memory unit and a reset unit; the crystal oscillator unit, the FLASH storage unit and the reset unit are all electrically connected with the Bluetooth control unit, and the Bluetooth control unit is respectively electrically connected with the power supply module, the radio frequency input/output module, the charging control module, the microphone bias module and the audio amplification output module.
Preferably, the radio frequency input/output module includes a balanced filter unit and a radio frequency antenna unit; the balance filter unit is respectively electrically connected with the power module and the Bluetooth main control module, and the radio frequency antenna unit is electrically connected with the balance filter unit.
Preferably, the power module comprises a voltage linear adjusting unit, a voltage monitoring unit and a voltage protection unit; the voltage linear adjusting unit is respectively electrically connected with the lithium battery, the voltage monitoring unit and the voltage protection unit, and the voltage monitoring unit is electrically connected with the voltage protection unit.
Preferably, the audio amplification and transmission module comprises a two-way operation amplification unit, a power amplification unit and a loudspeaker; the two-way operational amplification unit is electrically connected with the Bluetooth master control module, the power amplification unit is electrically connected with the two-way operational amplification unit, and the loudspeaker is electrically connected with the power amplification unit.
In a second aspect, the utility model also discloses a device, which comprises the control circuit of the stereo wireless bluetooth headset in the first aspect.
The control circuit of the stereo wireless Bluetooth headset has the following beneficial effects that: the device comprises a Bluetooth main control module, a radio frequency input/output module, a power supply module, a charging control module, a microphone bias module, an audio amplification output module and an LED module; the Bluetooth master control module, the radio frequency input and output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively and electrically connected with the power supply module; the radio frequency input/output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively electrically connected with the Bluetooth master control module. The Bluetooth main control module is used for providing stereo voice and data communication; the radio frequency input/output module is used for being matched with the Bluetooth main control module to realize input/output conversion between radio frequency signals of an antenna end; the power supply module is used for providing rated working voltage; the charging control module is used for realizing charging management control of the stereo wireless Bluetooth headset; the microphone bias module is used for providing direct current bias for an audio input device, namely a microphone; stereo audio output by the Bluetooth main control module is subjected to power amplification by the audio amplification output module and then output to a loudspeaker; the LED module is used for indicating the working state of the stereo wireless Bluetooth headset. Therefore, the utility model can realize high-quality Bluetooth audio and data transmission and improve the user experience.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
FIG. 1 is a schematic block diagram of a stereo wireless Bluetooth headset control circuit in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic block diagram of a stereo wireless Bluetooth headset control circuit according to another preferred embodiment of the present invention;
FIG. 3 is a circuit diagram of an RF input/output module of a stereo wireless Bluetooth headset control circuit according to a preferred embodiment of the present invention;
FIG. 4 is a circuit diagram of a power module of a stereo wireless Bluetooth headset control circuit according to a preferred embodiment of the present invention;
FIG. 5 is a circuit diagram of a microphone bias module of a stereo wireless Bluetooth headset control circuit according to a preferred embodiment of the present invention;
fig. 6 is an audio amplification output module of a stereo wireless bluetooth headset control circuit according to a preferred embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example one
Fig. 1 shows a preferred embodiment of the present invention, which includes a bluetooth master control module 1, a radio frequency input/output module 2, a power supply module 3, a charging control module 4, a microphone bias module 5, an audio amplification output module 6, and an LED module 7; the bluetooth master control module 1, the radio frequency input/output module 2, the charging control module 4, the microphone bias module 5, the audio amplification output module 6 and the LED module 7 are electrically connected to the power module 3, respectively; the radio frequency input/output module 2, the charging control module 4, the microphone bias module 5, the audio amplification output module 6 and the LED module 7 are respectively electrically connected with the Bluetooth master control module 1. The Bluetooth main control module 1 is used for providing stereo voice and data communication; the radio frequency input/output module 2 is used for being matched with the Bluetooth main control module to realize input/output conversion between radio frequency signals of an antenna end; the power supply module 3 is used for providing rated working voltage; the charging control module 4 is used for realizing charging management control of the stereo wireless Bluetooth headset; the microphone bias module 5 is used for providing a direct current bias voltage for an audio input device, namely a microphone; stereo audio output by the Bluetooth main control module 1 is amplified in power by the audio amplification output module 6 and then output to a loudspeaker; the LED module 7 is used for indicating the working state of the stereo wireless Bluetooth headset. Therefore, the utility model can realize high-quality Bluetooth audio and data transmission and improve the user experience.
Preferably, the control circuit of the stereo wireless bluetooth headset further comprises a key module 8; the key module 8 is electrically connected with the power module 3 and the bluetooth master control module 1 respectively. It will be appreciated that in this embodiment, the key module 8 is used to enable human-machine interaction with a stereo wireless bluetooth headset. For example, a first key of the key module 8 is pressed to switch the previous song; pressing a second key of the key module 8 to switch the next song; and pressing a third key of the key module 8 to pause playing.
Preferably, the bluetooth master control module 1 includes a bluetooth control unit 11, a crystal oscillator unit 12, a FLASH storage unit 13, and a reset unit 14; the crystal oscillator unit 12, the FLASH storage unit 13 and the reset unit 14 are all electrically connected to the bluetooth control unit 11, and the bluetooth control unit 11 is respectively electrically connected to the power module 3, the radio frequency input/output module 2, the charging control module 4, the microphone bias module 5 and the audio amplification output module 6. In this embodiment, the model number of the bluetooth host module 1 is BC 352239A. In another preferred embodiment, the model of the bluetooth host module 1 may be BC57E687C, BC417143B or BC57K687, and the chip model of the bluetooth host module 1 is not particularly limited.
Preferably, referring to fig. 3, the rf input/output module 2 includes a balanced filter unit 21 and an rf antenna unit 22; the balance filter unit 21 is electrically connected with the power module 3 and the bluetooth main control module 1, and the radio frequency antenna unit 22 is electrically connected with the balance filter unit 21. It is understood that, in the present embodiment, the balanced filter unit 21 includes the balun U2 with a balanced filter, and the balanced filter unit 21 is powered by direct current to realize input-output conversion between two differential radio frequency signals with a phase difference of 180 degrees and a radio frequency signal at an antenna end. The balance filter is used for realizing the frequency-selecting filtering function and eliminating the external signal interference from the mobile phone or other radio frequency equipment; if there is different impedance between the two elements, there is signal loss during rf transmission, so the inductor L2, the inductor L3, the capacitor C2 and the capacitor C5 are used to match impedance between the bluetooth master module 1 and the balun U2 with a balanced filter.
Preferably, referring to fig. 4, the power module 3 includes a voltage linear adjustment unit 31, a voltage monitoring unit 32 and a voltage protection unit 33; the voltage linear adjusting unit 31 is electrically connected with the lithium battery, the voltage monitoring unit 32 and the voltage protection unit 33 respectively, and the voltage monitoring unit 32 is electrically connected with the voltage protection unit 33. It can be understood that, in this embodiment, the lithium battery power supply is connected from the terminal K1, and passes through the voltage protection unit 33, the voltage protection unit 33 includes a voltage protection chip U3 and a dual-channel mosfet q2, and the voltage protection unit 33 is used for realizing battery management functions such as overvoltage, undervoltage, and overcurrent; the voltage linear adjustment unit 31 comprises a linear voltage adjuster U1, and the linear voltage adjuster U1 controls an enable terminal to realize the power-saving mode operation; the capacitor C1 and the capacitor C2 are decoupling capacitors at the input end and the output end of the linear voltage regulator U1 respectively; the voltage monitoring unit comprises a voltage monitor U4, a comparator circuit is arranged in the voltage monitor U4 and used for preventing low voltage and high current from damaging the Bluetooth main control module 1, and output voltage is divided by a resistor R17 and a resistor R19 and then is connected to a simulation input port of the lithium battery to measure battery voltage. In the present embodiment, the chip type of the voltage linearity adjusting unit 31 is MC78PC33NNTRG, the chip type of the voltage monitoring unit is NCP304LSQ3011G, the chip type of the voltage protection unit is 3-B261AAJMD-G2J-T2G, and in another preferred embodiment, the chip types of the voltage linearity adjusting unit 31, the voltage monitoring unit 32, and the voltage protection unit 33 are not particularly limited.
Preferably, referring to fig. 5, the microphone is an audio input device, and thus the microphone needs a dc bias voltage to operate. The positive pole of the microphone is a depletion output, and is connected with a direct current bias voltage through a resistor R10, and the negative pole of the microphone is connected with the ground. The audio ac signal generates a differential signal through the dc bias across resistor R10 as the audio input signal. The capacitor C15 and the capacitor C17 block the dc signal. The Bluetooth master control module 1 provides a direct current voltage to the anode of the microphone through the PIO port to serve as a bias voltage. The capacitor C13 and the capacitor C19 are used as decoupling capacitors of the high-frequency noise signals. The triode Q3, the capacitor C8, the capacitor C9 and the resistor R7 form an active filter circuit.
Preferably, referring to fig. 6, the audio amplifying and outputting module includes a two-way operational amplifying unit 61, a power amplifying unit 62 and a speaker 63; the two-way operational amplification unit 61 is electrically connected with the Bluetooth main control module 1, the power amplification unit 62 is electrically connected with the two-way operational amplification unit 61, and the loudspeaker 63 is electrically connected with the power amplification unit 62. It is understood that the stereo differential audio signals of the left and right channels enter the power amplification unit 62 from the two-way operational amplification unit 61 and are output to the speakers on both sides, and the output of the audio signals of this embodiment is differential signals with a phase difference of 180 degrees. In this embodiment, the dual-path operational amplifier unit 61 includes a dual-path operational amplifier U11, the dual-path operational amplifier U11 and a peripheral resistor constitute a proportional operational amplifier circuit, and the capacitor C28, the capacitor C29, the capacitor C35 and the capacitor C36 are decoupling capacitors for differential ac audio signals; the power amplifier unit 62 includes a power amplifier U9 for providing rated power to the speaker load, and a capacitor C44 and a capacitor C46 for providing input capacitors for blocking dc current while ensuring that a fixed audio signal passes through.
Example two
The utility model also discloses a device which comprises the stereo wireless Bluetooth headset control circuit.
In summary, the control circuit of the stereo wireless bluetooth headset provided by the present invention includes a bluetooth main control module 1, a radio frequency input/output module 2, a power module 3, a charging control module 4, a microphone bias module 5, an audio amplification output module 6, and the LED module 7; the bluetooth master control module 1, the radio frequency input/output module 2, the charging control module 4, the microphone bias module 5, the audio amplification output module 6 and the LED module 7 are electrically connected to the power module 3, respectively; the radio frequency input/output module 2, the charging control module 4, the microphone bias module 5, the audio amplification output module 6 and the LED module 7 are respectively electrically connected with the Bluetooth master control module 1. The Bluetooth main control module 1 is used for providing stereo voice and data communication; the radio frequency input/output module 2 is used for being matched with the Bluetooth main control module to realize input/output conversion between radio frequency signals of an antenna end; the power supply module 3 is used for providing rated working voltage; the charging control module 4 is used for realizing charging management control of the stereo wireless Bluetooth headset; the microphone bias module 5 is used for providing a direct current bias voltage for an audio input device, namely a microphone; stereo audio output by the Bluetooth main control module 1 is amplified in power by the audio amplification output module 6 and then output to a loudspeaker; the LED module 7 is used for indicating the working state of the stereo wireless Bluetooth headset. Therefore, the utility model can realize high-quality Bluetooth audio and data transmission and improve the user experience.
The stereo wireless bluetooth headset control circuit and device provided by the utility model are described in detail above, and a specific example is applied in the text to explain the principle and the implementation of the utility model, and the description of the above embodiment is only used to help understanding the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be a change in the specific implementation and application scope, and in summary, the content of the present specification is only an implementation of the present invention, and not a limitation to the scope of the present invention, and all equivalent structures or equivalent flow transformations made by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention. And should not be construed as limiting the utility model.
Claims (7)
1. A stereo wireless Bluetooth headset control circuit, comprising: the device comprises a Bluetooth main control module, a radio frequency input/output module, a power supply module, a charging control module, a microphone bias module, an audio amplification output module and an LED module; the Bluetooth master control module, the radio frequency input and output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively and electrically connected with the power supply module; the radio frequency input/output module, the charging control module, the microphone bias module, the audio amplification output module and the LED module are respectively electrically connected with the Bluetooth master control module.
2. The stereo wireless Bluetooth headset control circuit of claim 1, further comprising a key module; the key module is respectively electrically connected with the power module and the Bluetooth master control module.
3. The control circuit of the stereo wireless Bluetooth headset of claim 1 or 2, wherein the Bluetooth master control module comprises a Bluetooth control unit, a crystal oscillator unit, a FLASH storage unit and a reset unit; the crystal oscillator unit, the FLASH storage unit and the reset unit are all electrically connected with the Bluetooth control unit, and the Bluetooth control unit is respectively electrically connected with the power supply module, the radio frequency input/output module, the charging control module, the microphone bias module and the audio amplification output module.
4. The stereo wireless Bluetooth headset control circuit of claim 1, wherein the radio frequency input output module comprises a balanced filter unit and a radio frequency antenna unit; the balance filter unit is respectively electrically connected with the power module and the Bluetooth main control module, and the radio frequency antenna unit is electrically connected with the balance filter unit.
5. The stereo wireless Bluetooth headset control circuit of claim 1, wherein the power module comprises a voltage linearity adjusting unit, a voltage monitoring unit and a voltage protection unit; the voltage linear adjusting unit is respectively electrically connected with the lithium battery, the voltage monitoring unit and the voltage protection unit, and the voltage monitoring unit is electrically connected with the voltage protection unit.
6. The control circuit of claim 1, wherein the audio amplification and output module comprises a two-way operational amplifier unit, a power amplifier unit and a speaker; the two-way operational amplification unit is electrically connected with the Bluetooth master control module, the power amplification unit is electrically connected with the two-way operational amplification unit, and the loudspeaker is electrically connected with the power amplification unit.
7. An apparatus comprising a stereo wireless bluetooth headset control circuit as claimed in any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121151703.6U CN215345007U (en) | 2021-05-26 | 2021-05-26 | Stereo wireless Bluetooth headset control circuit and device |
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| CN202121151703.6U CN215345007U (en) | 2021-05-26 | 2021-05-26 | Stereo wireless Bluetooth headset control circuit and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337211A (en) * | 2022-03-08 | 2022-04-12 | 深圳英集芯科技股份有限公司 | Critical value oscillation control device, equipment and wireless earphone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337211A (en) * | 2022-03-08 | 2022-04-12 | 深圳英集芯科技股份有限公司 | Critical value oscillation control device, equipment and wireless earphone |
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