CN220693341U - Miniaturized hearing aid - Google Patents
Miniaturized hearing aid Download PDFInfo
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- CN220693341U CN220693341U CN202322367364.0U CN202322367364U CN220693341U CN 220693341 U CN220693341 U CN 220693341U CN 202322367364 U CN202322367364 U CN 202322367364U CN 220693341 U CN220693341 U CN 220693341U
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Abstract
The utility model relates to the technical field of audio equipment, and provides a miniaturized hearing aid, which comprises a main controller, an audio processing module and a level conversion module, wherein the main controller and the audio processing module which are directly connected are arranged based on the level difference of communication signals between the main controller and the audio processing module, and high-level signals sent from the main controller to the audio processing module are transmitted; because the signal level of the main controller is higher than that of the main controller, a comparator is connected in series between the signal transmitting pin of the main controller and the audio processing module, and the signal output by the audio processing module is subjected to level conversion by the comparator, so that bidirectional signal communication between the main controller and the audio processing module is realized, few circuit devices are arranged, and the ultra-small comparator is packaged, so that the space of a PCB (printed circuit board) is greatly saved, and the miniaturization of products is facilitated. The space volume is reduced, and the product appearance of the hearing aid can be designed to be smaller and more attractive.
Description
Technical Field
The utility model relates to the technical field of audio equipment, in particular to a miniaturized hearing aid.
Background
With the continuous development of electronic technology, more and more devices are provided for playing audio signals, and the audio devices represented by headphones not only can convert electric signals into sound signals to be directly transmitted to human ears, so that an audio playing function is realized; the voice signal can be converted into an electric signal which can be transmitted, so that the voice call function is realized.
When signal communication is performed between some modules or ICs in the hearing aid earphone, a level conversion circuit is required to be set for signal processing due to inconsistent levels of the two parties, and components such as a triode, a MOS tube or a diode are usually adopted for design. However, if the volume requirement of such a product is in a very small use scenario, the space for the device where the PCB can be placed will be very small, and the circuit device for such level conversion will occupy a large space, which is not beneficial to miniaturization of the product, and cannot realize miniaturized design of the earphone.
Disclosure of Invention
The utility model provides a miniaturized hearing aid, which solves the technical problems that the existing level conversion circuit is large in size and cannot be suitable for use scenes (such as in a headset) with smaller space, so that the existing level conversion circuit cannot be suitable for miniaturization of products.
In order to solve the technical problems, the utility model provides a miniaturized hearing aid, which comprises a main controller, an audio processing module and a level conversion module, wherein the level conversion module is in signal connection with the main controller and the audio processing module; the main controller is in signal connection with the audio processing module;
the level conversion module comprises a comparator, a first resistor and a second resistor, one end of the first resistor is connected with a power supply end, and the other end of the first resistor is grounded through the second resistor; the non-inverting input end of the comparator is connected between the first resistor and the second resistor, the inverting input end of the comparator is connected with the signal transmitting pin of the main controller and the signal receiving pin of the audio processing module, and the output end of the comparator is connected with the signal receiving pin of the main controller.
The beneficial effect of this basic scheme is: based on the difference of the communication signal level between the main controller and the audio processing module, setting the directly connected main controller and the audio processing module, and transmitting a high-level signal sent from the main controller to the audio processing module; because the signal level of the main controller is higher than that of the main controller, a comparator is connected in series between the signal transmitting pin of the main controller and the audio processing module, and the signal output by the audio processing module is subjected to level conversion by the comparator, so that bidirectional signal communication between the main controller and the audio processing module is realized, few circuit devices are arranged, and the ultra-small comparator is packaged, so that the space of a PCB (printed circuit board) is greatly saved, and the miniaturization of products is facilitated. The space volume is reduced, and the product appearance of the hearing aid can be designed to be smaller and more attractive.
In a further embodiment, the audio processing module comprises a digital audio processor and a radio microphone and a loudspeaker connected with the digital audio processor;
the audio input end of the digital audio processor is connected with the radio microphone, the audio output end of the digital audio processor is connected with the loudspeaker, and the signal end of the digital audio processor is connected with the inverting input end of the comparator and the signal emitting pin of the main controller.
In a further embodiment, the utility model further comprises a communication module, wherein the communication module comprises a Bluetooth module and a key input module, and the main controller is electrically connected with the Bluetooth module and the key input module.
The scheme is provided with diversified signal input equipment, comprises wireless input represented by the Bluetooth module and wired input represented by the key input module, and is more comprehensive in equipment control mode and more convenient to use.
In a further embodiment, the utility model further comprises a power module comprising a charging interface, a rechargeable battery and a voltage stabilizing chip;
one end of the charging interface is connected with an external power supply, and the other end of the charging interface is connected with the rechargeable battery; the rechargeable battery is connected with the input end of the voltage stabilizing chip; and the output end of the voltage stabilizing chip is connected with the main controller, the radio microphone and the Bluetooth module.
The scheme is based on a rechargeable battery design power supply module, and the rechargeable battery design power supply module is connected with an external power supply through a charging interface and has the advantages of high energy density, long cycle life, environmental protection, safety, high reliability and the like.
In a further embodiment, the utility model further comprises a voltage regulating module, wherein the input end of the voltage regulating module is connected with the rechargeable battery, and the output end of the voltage regulating module is connected with the digital audio processor.
In a further embodiment, the voltage regulation module comprises a DC/DC converter.
According to the scheme, the DC/DC converter is connected to the rechargeable battery to regulate the input voltage, so that the power consumption requirement of the digital audio processor is met.
In a further embodiment, the rechargeable battery comprises a rechargeable lithium battery.
The rechargeable lithium battery is adopted in the scheme, so that the service life and the endurance of the equipment can be effectively improved.
In a further embodiment, the master controller comprises an MCU.
Drawings
Fig. 1 is a system frame diagram of a miniaturized hearing aid according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of level shifting provided by an embodiment of the present utility model;
FIG. 3 is a partial circuit block diagram provided by an embodiment of the present utility model;
wherein: the device comprises a comparator U1, a first resistor R1 and a second resistor R2; the device comprises a main controller MCU, a digital audio processor DSP, a radio microphone MIC, a Bluetooth module BT, a KEY input module KEY and a voltage stabilizing chip LDO.
Detailed Description
The following examples are given for the purpose of illustration only and are not to be construed as limiting the utility model, including the drawings for reference and description only, and are not to be construed as limiting the scope of the utility model as many variations thereof are possible without departing from the spirit and scope of the utility model.
As shown in FIG. 1, in the embodiment, the miniaturized hearing aid provided by the embodiment of the utility model comprises a main controller MCU, an audio processing module, a level conversion module, a communication module, a power supply module and a voltage regulation module;
the level conversion module is in signal connection with the main controller MCU and the audio processing module; the main controller MCU is in signal connection with the audio processing module;
the level conversion module comprises a comparator U1, a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is connected with a power supply end, and the other end of the first resistor R1 is grounded through the second resistor R2; the positive phase input end IN+ of the comparator U1 is connected between the first resistor R1 and the second resistor R2, the negative phase input end IN-is connected with the signal transmitting pin of the main controller MCU and the audio processing module IN a signal manner, the output end OUT pin of the comparator U1 is connected with the signal receiving pin of the main controller MCU, and the VCC pin of the comparator U1 is connected with the power supply end.
The non-inverting input end in+ of the comparator U1 is used for setting a preset voltage value, the voltage is divided by adopting the first resistor R1 and the second resistor R2 which are connected IN series, and when the voltage of the node is smaller than the signal of the digital audio processor DSP, a low level is output, and otherwise, a high level is output. The VCC pin of the comparator U1 is a power input, wherein the 7031_vcc power supply is consistent with the MCU high level, and acts to keep the comparator U1 output high level consistent with the MCU level.
In this embodiment, a subminiature comparator, for example, a 0.8mm x 0.8mm packaged comparator, is selected.
In this embodiment, the audio processing module includes a digital audio processor DSP, and a radio microphone MIC and a speaker connected to the digital audio processor DSP;
the audio input end of the digital audio processor DSP is connected with the sound receiving microphone MIC, the audio output end is connected with the loudspeaker, and the signal end of the audio output end is connected with the inverted input end IN-of the comparator U1 and the signal emitting pin of the main controller MCU.
Among them, the digital audio processor DSP is mainly used for processing sound, including sound amplification, compression, compensation, and the like. The sound source signal of the digital audio processor DSP is collected and provided by the sound receiving microphone MIC, and is processed by the digital audio processor DSP and then output to the loudspeaker.
In this embodiment, the communication module includes a bluetooth module BT and a KEY input module KEY, and the main controller MCU is electrically connected to the bluetooth module BT and the KEY input module KEY.
The input KEYs of the KEY input module KEY comprise sound size adjustment and mode switching, an input instruction of the KEY input module KEY is input to the main controller MCU, and the main controller MCU transmits an instruction signal to the digital audio processor DSP.
The Bluetooth module BT is used for receiving an external Bluetooth signal instruction, then sending the Bluetooth signal instruction to the main controller MCU, and then executing corresponding actions by the main controller MCU.
The embodiment is provided with diversified signal input equipment, comprises wireless input represented by the Bluetooth module BT and wired input represented by the KEY input module KEY, and has more comprehensive equipment control mode and more convenient use.
In this embodiment, the power supply module includes a charging interface, a rechargeable battery, and a voltage stabilizing chip LDO;
one end of the charging interface is connected with an external power supply, and the other end of the charging interface is connected with the rechargeable battery; the rechargeable battery is connected with the input end of the LDO; the output end of the LDO is connected with the MCU, the MIC and the BT module and used for providing power.
In this embodiment, the rechargeable battery includes a rechargeable lithium battery.
This embodiment:
the rechargeable lithium battery is adopted, so that the service life and the endurance of the equipment can be effectively improved.
Based on chargeable battery design power module, utilize the interface of charging to be connected with external power supply, possess high energy density, long cycle life, environmental protection, safety, reliability advantage such as strong.
In this embodiment, the input end of the voltage regulating module is connected with the rechargeable battery, and the output end is connected with the digital audio processor DSP.
In this embodiment, the voltage regulation module includes a DC/DC converter (e.g., DC/DC in fig. 1).
In the embodiment, the DC/DC converter is connected to the rechargeable battery to regulate the input voltage, so that the power consumption requirement of the digital audio processor DSP is met.
In other embodiments, the main controller MCU may also select other processing chips with data processing functions according to actual requirements.
Referring to fig. 2 and 3, the interaction principle between the main controller MCU and the digital audio processor DSP in this embodiment is as follows:
referring to fig. 2, the MCU is a high voltage side, the DSP is a low voltage side, the dsp_r is an MCU signal receiving pin, the SDA is an MCU signal transmitting pin, and the SDA on the DSP side is its transmitting and receiving pins. The SDAs on the two sides are directly connected, and the SDA on the DSP side is connected to the DSP_R through a level conversion circuit.
The MCU signals the DSP directly.
When the DSP signals the MCU, the high-level voltage of the DSP is lower than the high level of the MCU and cannot be directly driven, at the moment, the SDA is connected to the inverting input end IN-of the comparator U1, the inverting input end IN-is smaller than the input end IN+ of Yu Zhengxiang, and the output end OUT pin of the comparator U1 outputs the high level of the high voltage; when the inverting input terminal IN-is higher than the non-inverting input terminal IN+, the output terminal OUT pin of the comparator U1 outputs a low level, thus completing level conversion. Note that the level is inverted during level conversion, and the receiving end needs to invert.
The embodiment of the utility model has the beneficial effects that: based on the difference of the communication signal level between the main controller MCU and the audio processing module, setting the directly connected main controller MCU and the audio processing module, and transmitting a high-level signal sent from the main controller MCU to the audio processing module; because the signal level of the MCU of the main controller is higher than that of the MCU of the main controller, a comparator U1 is connected in series between the signal transmitting pin of the MCU of the main controller and the audio processing module, and the signal output by the audio processing module is subjected to level conversion by using the comparator U1, so that the bidirectional signal communication between the MCU of the main controller and the audio processing module is realized, and the circuit devices are fewer, the ultra-small comparator U1 is packaged, the space of a PCB is greatly saved, and the miniaturization of products is facilitated. The space volume is reduced, and the product appearance of the hearing aid can be designed to be smaller and more attractive.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (8)
1. A miniaturized hearing aid, characterized in that: the system comprises a main controller, an audio processing module and a level conversion module, wherein the level conversion module is in signal connection with the main controller and the audio processing module; the main controller is in signal connection with the audio processing module;
the level conversion module comprises a comparator, a first resistor and a second resistor, one end of the first resistor is connected with a power supply end, and the other end of the first resistor is grounded through the second resistor; the non-inverting input end of the comparator is connected between the first resistor and the second resistor, the inverting input end of the comparator is connected with the signal transmitting pin of the main controller and the signal receiving pin of the audio processing module, and the output end of the comparator is connected with the signal receiving pin of the main controller.
2. A miniaturized hearing aid as set forth in claim 1, wherein: the audio processing module comprises a digital audio processor and a sound receiving microphone and a loudspeaker which are connected with the digital audio processor;
the audio input end of the digital audio processor is connected with the radio microphone, the audio output end of the digital audio processor is connected with the loudspeaker, and the signal end of the digital audio processor is connected with the inverting input end of the comparator and the signal emitting pin of the main controller.
3. A miniaturized hearing aid as set forth in claim 2, wherein: the communication module comprises a Bluetooth module and a key input module, and the main controller is electrically connected with the Bluetooth module and the key input module.
4. A miniaturized hearing aid as set forth in claim 3, wherein: the power supply module comprises a charging interface, a rechargeable battery and a voltage stabilizing chip;
one end of the charging interface is connected with an external power supply, and the other end of the charging interface is connected with the rechargeable battery; the rechargeable battery is connected with the input end of the voltage stabilizing chip; and the output end of the voltage stabilizing chip is connected with the main controller, the radio microphone and the Bluetooth module.
5. A miniaturized hearing aid as set forth in claim 4, wherein: the portable digital audio processor also comprises a voltage regulating module, wherein the input end of the voltage regulating module is connected with the rechargeable battery, and the output end of the voltage regulating module is connected with the digital audio processor.
6. A miniaturized hearing aid as set forth in claim 5, wherein: the voltage regulation module includes a DC/DC converter.
7. A miniaturized hearing aid as set forth in claim 4, wherein: the rechargeable battery includes a rechargeable lithium battery.
8. A miniaturized hearing aid as set forth in claim 1, wherein: the main controller includes an MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322367364.0U CN220693341U (en) | 2023-08-31 | 2023-08-31 | Miniaturized hearing aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322367364.0U CN220693341U (en) | 2023-08-31 | 2023-08-31 | Miniaturized hearing aid |
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| Publication Number | Publication Date |
|---|---|
| CN220693341U true CN220693341U (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322367364.0U Active CN220693341U (en) | 2023-08-31 | 2023-08-31 | Miniaturized hearing aid |
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| CN (1) | CN220693341U (en) |
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- 2023-08-31 CN CN202322367364.0U patent/CN220693341U/en active Active
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