A power supply and differential signal transmission device and headphones

Abstract

This invention discloses a device for transmitting power and differential signals over a network and an earphone. The device includes a first signal transmission module and a second signal transmission module. The first signal transmission module includes a first transmitting transformer and a first coupling power management circuit. The first transmitting transformer receives the differential signal, and the first coupling power management circuit transmits the power signal to the first transmitting transformer to output the coupled differential signal and power signal. The second signal transmission module includes a second receiving transformer and a second separating power management circuit. The input terminal of the second receiving transformer receives the coupled differential signal and power signal, and the second separating power management circuit separates the power signal from the second receiving transformer. The second separating power management circuit outputs at least one voltage signal based on the power signal. Because this invention couples the power line signal with the differential signal for transmission, it saves interface terminals, allowing the earphone to transmit more data and achieve more functions using a limited number of interfaces.

Description

Technical Field

[0001] This invention relates to the field of smart earphone technology, and more particularly to a power supply and differential signal transmission device over a network. Background Technology

[0002] With the rapid development of electronic products, there are all kinds of products on the market, and their functions are becoming more and more diversified and sophisticated. This has led to some products having insufficient communication lines or interfaces, making it impossible to accommodate too many signal lines or power cord interfaces, such as headphones. As a result, some products have had to change their original design and reduce some functions. Summary of the Invention

[0003] To address the aforementioned shortcomings, the technical problem to be solved by this invention is to provide a power and differential signal transmission device and an earphone that couples the power line and differential signal together for transmission, saving the interface terminals occupied by the power signal input, and enabling the earphone to transmit more data and achieve more functions using a limited number of interfaces.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] A power and differential signal co-transmission network device includes a first signal transmission module and a second signal transmission module. The first signal transmission module includes a first transmitting transformer and a first coupling power management circuit. A center tap at the input of the first transmitting transformer is grounded, and a center tap at the output of the first transmitting transformer is electrically connected to the output of the first coupling power management circuit. A differential signal is input to the first transmitting transformer, and the first coupling power management circuit transmits a power signal to the first transmitting transformer, causing the first transmitting transformer to output coupled differential and power signals. The second signal transmission module includes a second receiving transformer and a second separating power management circuit. The input of the second receiving transformer is electrically connected to the output of the first transmitting transformer to receive the coupled differential and power signals. A center tap at the input of the second receiving transformer is electrically connected to the input of the second separating power management circuit to separate the power signal. A center tap at the output of the second receiving transformer is electrically connected to a reference terminal of the second separating power management circuit, causing the second receiving transformer to output a differential signal. The second separating power management circuit outputs at least one voltage signal based on the power signal.

[0006] In a preferred embodiment, the first signal transmission module further includes a first differential signal converter and a first data processor electrically connected together, the first differential signal converter being electrically connected to the input terminal of the first transmitting transformer; the second signal transmission module further includes a second differential signal converter and a second data processor electrically connected together, the second differential signal converter being electrically connected to the output terminal of the second receiving transformer.

[0007] In a preferred embodiment, the first signal transmission module further includes a first receiving transformer and a first discrete power management circuit. The center tap at the input of the first receiving transformer is electrically connected to the input of the first discrete power management circuit to separate the power signal. The center tap at the output of the first receiving transformer is electrically connected to the reference terminal of the first discrete power management circuit, causing the first receiving transformer to output a differential signal. The first discrete power management circuit outputs at least one voltage signal based on the power signal. The second signal transmission module further includes a second transmitting transformer and a second coupling power management circuit. The center tap at the input of the second transmitting transformer is grounded. The center tap at the output of the second transmitting transformer is electrically connected to the output of the second coupling power management circuit. The input of the second transmitting transformer receives the differential signal. The power signal transmitted by the second coupling power management circuit is sent to the second receiving transformer, causing the second receiving transformer to output a coupled differential signal and a power signal.

[0008] In a preferred embodiment, the first signal transmission module further includes a first handshake identification circuit, which is electrically connected to the enable terminal of the first separate power management circuit; the second signal transmission module further includes a second handshake identification circuit, which is electrically connected to the enable terminal of the second separate power management circuit; when the first handshake identification circuit and the second handshake identification circuit successfully handshake, an enable signal is transmitted to the first separate power management circuit or the second separate power management circuit, so that the first separate power management circuit or the second separate power management circuit outputs at least one voltage signal according to the power signal.

[0009] In a preferred embodiment, the first handshake identification circuit and the second handshake identification circuit are wirelessly connected.

[0010] In a preferred embodiment, the first transmitting transformer and the second receiving transformer have the same structure.

[0011] In a preferred embodiment, the first receiving transformer and the second transmitting transformer have the same structure.

[0012] In a preferred embodiment, the reference voltage values ​​output from the reference terminals of both the first and second separate power management circuits are set based on the differential signal and the minimum allowable voltage fluctuation value.

[0013] An earphone, comprising the aforementioned power supply and differential signal transmission device.

[0014] The preferred embodiment includes a left earphone and a right earphone, wherein a battery is disposed in the left earphone, or a battery is disposed in the right earphone.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are:

[0016] Because the power supply and differential signal of this invention are transmitted together in a network device and headphones, the device includes a first signal transmission module and a second signal transmission module; the first signal transmission module includes a first transmitting transformer and a first coupling power management circuit, the first transmitting transformer is used to receive the differential signal, and the first coupling power management circuit is used to transmit the power signal to the first transmitting transformer, so that the first transmitting transformer outputs the coupled differential signal and power signal; the second signal transmission module includes a second receiving transformer and a second separating power management circuit, the input terminal of the second receiving transformer is connected to the coupled differential signal and power signal, the second separating power management circuit separates the power signal from the second receiving transformer, and ensures that the second receiving transformer outputs the differential signal transmitted from the first signal transmission module; and the second separating power management circuit outputs at least one voltage signal according to the power signal to meet different operating voltage requirements; because this invention couples the power line signal and the differential signal together for transmission, it saves the interface terminals occupied by the power signal input, allowing the headphones to transmit more data and achieve more functions using a limited number of interfaces. Attached Figure Description

[0017] Figure 1 This is a block diagram illustrating the principle of the power supply and differential signal transmission device in this invention.

[0018] Figure 2 This is a principle block diagram of an embodiment of the present invention;

[0019] In the diagram: 100 - First signal transmission module, 10 - First transmitting transformer, 11 - First receiving transformer, 12 - First differential signal converter, 13 - First data processor, 14 - First coupling power management circuit, 15 - First split power management circuit, 16 - First handshake identification circuit, 200 - Second signal transmission module, 20 - Second receiving transformer, 21 - Second transmitting transformer, 22 - Second differential signal converter, 23 - Second data processor, 24 - Second split power management circuit, 25 - Second coupling power management circuit, 26 - Second handshake identification circuit. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0022] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] like Figure 1 As shown, according to an embodiment of the first aspect of the present invention, the power supply and differential signal transmission device includes a first signal transmission module 100 and a second signal transmission module 200.

[0024] The first signal transmission module 100 includes a first transmitting transformer 10 and a first coupling power management circuit 14. The center tap of the input terminal of the first transmitting transformer 10 is grounded to GND, and the center tap of the output terminal of the first transmitting transformer 10 is electrically connected to the output terminal of the first coupling power management circuit 14. A differential signal is input to the input terminal of the first transmitting transformer 10, and the first coupling power management circuit 14 transmits a power signal VCC to the first transmitting transformer 10, causing the first transmitting transformer 10 to output coupled differential and power signals. In this invention, the first signal transmission module 100 also includes a first differential signal converter 12 and a first data processor 13. The input terminal of the first differential signal converter 12 is electrically connected to the input terminal of the first transmitting transformer 10, and the output terminal of the first differential signal converter 12 is electrically connected to the first data processor 13.

[0025] The second signal transmission module 200 includes a second receiving transformer 20 and a second discrete power management circuit 24. The input terminal of the second receiving transformer 20 is electrically connected to the output terminal of the first transmitting transformer 10 to receive coupled differential signals and power signals. The intermediate tap of the input terminal of the second receiving transformer 20 is electrically connected to the input terminal of the second discrete power management circuit 24 to separate the power signal VCC. The intermediate tap of the output terminal of the second receiving transformer 20 is electrically connected to the reference terminal Vref of the second discrete power management circuit 24, so that the second receiving transformer 20 outputs a differential signal. In this invention, the second signal transmission module 200 also includes a second differential signal converter 22 and a second data processor 23. The input terminal of the second differential signal converter 22 is electrically connected to the output terminal of the second receiving transformer 20, and the output terminal of the second differential signal converter 22 is electrically connected to the second data processor 23.

[0026] In this invention, the first differential signal converter 12 and the second differential signal converter 22 mainly convert between single-channel signals and differential signals, reduce interference of high-speed signals in long-distance transmission, and protect signal data from loss or transformation during transmission.

[0027] In this invention, the second separate power management circuit 24 outputs at least one voltage signal according to the power signal VCC. The second separate power management circuit 24 may include, but is not limited to, a voltage conversion circuit. This voltage conversion circuit can convert the power signal VCC into different voltage signals, that is, output at least one voltage signal, which can improve different working voltages, such as 3.3V, 5V, etc.; thus indirectly realizing multiple functions.

[0028] In a preferred embodiment, the first transmitting transformer 10 and the second receiving transformer 20 have the same structure, which reduces the impact on the differential signal during transmission and ensures the stability of the differential signal transmission.

[0029] like Figure 1 As shown, when the power supply and differential signal of the present invention are working with the network transmission device, the power supply signal and differential signal are integrated and separated by the first transmitting transformer 10 and the second receiving transformer 20. The first signal transmission module 100 is used to transmit the coupled power supply signal and differential signal, and the second signal transmission module 200 is used to separate the power supply signal and differential signal.

[0030] The first data processor 13 transmits the high-speed signal to the first differential signal converter, thereby converting it into differential signals P and N. The differential signals are then transmitted to the input of the first transmitting transformer 10. A power supply VCC is superimposed on the center of the output of the first transmitting transformer 10. This power supply VCC is output by the first coupling power management circuit 14 and then transmitted to the second receiving transformer 20. This is equivalent to adding a power supply bias to the output signal. Furthermore, the first signal transmission module 100 and the second signal transmission module 200 can transmit the differential signals described above.

[0031] The differential signal with added bias power is transmitted to the second receiving transformer 20. A signal is led out from the center of the second receiving transformer 20 to the second separate power management circuit 24. This signal is the power supply VCC that follows the signal transmission. With the input voltage VCC, the second separate power management circuit 24 can output other corresponding power supplies to power the first signal transmission module 100 or other power-consuming modules. The signal input to the second receiving transformer 20, due to the characteristics of the transformer, only transmits AC signals. The signal output by the transformer is a normal AC signal without bias voltage. Adding a bias voltage Vref output by the second separate power management circuit 24 to the midpoint of the output terminal of the second receiving transformer 20 makes the signals of the two output ports of the second receiving transformer 20 above the 0 level. Then it is transmitted to the second differential signal converter 22. After integration processing, a normal high-speed single-ended signal is output to the second data processor 23, thereby realizing data transmission.

[0032] As can be seen, this invention couples the power line number with the differential signal for transmission, saving the interface terminals occupied by the power signal VCC input, and using a limited number of interfaces to transmit more data and achieve more functions.

[0033] like Figure 2 As shown, in some embodiments of the present invention, the first signal transmission module 100 further includes a first receiving transformer 11 and a first discrete power management circuit 15. The intermediate tap at the input terminal of the first receiving transformer 11 is electrically connected to the input terminal of the first discrete power management circuit 15 to separate the power signal VCC. The intermediate tap at the output terminal of the first receiving transformer 11 is electrically connected to the reference terminal Vref of the first discrete power management circuit 15, so that the first receiving transformer 11 outputs a differential signal. The first discrete power management circuit 15 outputs at least one voltage signal according to the power signal VCC.

[0034] The second signal transmission module 200 also includes a second transmitting transformer 21 and a second coupling power management circuit 25. The middle tap of the input terminal of the second transmitting transformer 21 is grounded to GND, and the middle tap of the output terminal of the second transmitting transformer 21 is electrically connected to the output terminal of the second coupling power management circuit 25. The input terminal of the second transmitting transformer 21 is connected to a differential signal, and the power signal VCC of the second coupling power management circuit 25 is transmitted to the second receiving transformer 20, so that the second receiving transformer 20 outputs a coupled differential signal and a power signal.

[0035] In a preferred embodiment, the first receiving transformer 11 and the second transmitting transformer 21 have the same structure, which reduces the impact on the differential signal during transmission and ensures the stability of the differential signal transmission.

[0036] In these embodiments, the first signal transmission module 100 has both sending and receiving signal functions, and the second signal transmission module 200 also has both sending and receiving signal functions. When the power supply and differential signal transmission network device of the present invention is applied to headphones, the two headphones have the same function and can be configured with interfaces, internal functional modules, etc. according to actual needs.

[0037] like Figure 2 As shown, in some embodiments of the present invention, the first signal transmission module 100 further includes a first handshake identification circuit 16, which is electrically connected to the enable terminal of the first discrete power management circuit 15, and can be electrically connected to the first data processor 13; the second signal transmission module 200 further includes a second handshake identification circuit 26, which is electrically connected to the enable terminal of the second discrete power management circuit 24, and can be electrically connected to the second data processor 23.

[0038] When the first handshake identification circuit 16 and the second handshake identification circuit 26 successfully handshake, an enable signal is transmitted to the first separate power management circuit 15 or the second separate power management circuit 24, causing the first separate power management circuit 15 or the second separate power management circuit 24 to output at least one voltage signal according to the power signal VCC.

[0039] In a preferred embodiment, the first handshake identification circuit 16 and the second handshake identification circuit 26 are wirelessly connected, for example, the first handshake identification circuit 16 and the second handshake identification circuit 26 are connected via Bluetooth.

[0040] The power and differential signal transmission device of the present invention is applied to an earphone. When the earphone includes a left earphone and a right earphone, the first signal transmission module 100 can be located in the left earphone, and the second signal transmission module 200 can be located in the right earphone. When the first signal transmission module 100 sends the coupled power signal and differential signal to the second signal transmission module 200, the second separate power management module can separate the power signal VCC and output the required operating voltage signal according to the needs of the earphone.

[0041] When the first handshake identification circuit 16 and the second handshake identification circuit 26 are working, after a successful handshake between them, the second handshake identification circuit 26 transmits an enable signal to the second separate power management circuit, enabling it to output a voltage signal to provide the right earphone with a power signal VCC (operating voltage). If the handshake between the first and second handshake identification circuits fails, the second handshake identification circuit 26 does not transmit an enable signal to the second separate power management circuit 24, and the second separate power management circuit 24 cannot output a voltage signal. This indicates that the left and right earphones are not compatible. Alternatively, if the handshake between the first and second handshake identification circuits fails, the first handshake identification circuit 16 can transmit a corresponding electrical signal to the first data processor 13 to notify the left earphone, or the second handshake identification circuit 26 can transmit a corresponding electrical signal to the second data processor 23 to notify the right earphone.

[0042] In addition, whether the first handshake identification circuit 16 is put into use can be controlled by the first data processor 13, and whether the second handshake identification circuit 26 is put into use can be controlled by the second data processor 23, such as controlling the enable terminal of the first handshake identification circuit 16 or the second handshake identification circuit 26.

[0043] When the second signal transmission module 200 acts as a data sending module and the first signal transmission module 100 acts as a data receiving module, whether the first separate power management circuit 15 outputs a voltage signal can also be controlled by the first handshake identification circuit 16 according to the above principle.

[0044] It should be noted that when the first signal transmission module 100 and the second signal transmission module 200 of the present invention are applied to Bluetooth headsets, a handshake identification circuit is not required. Identification can be performed by pairing between Bluetooth headsets. Specifically, the enable terminals of the first separate power management circuit 15 and the second separate power management circuit 24 can be controlled by the Bluetooth module.

[0045] In some embodiments of the present invention, the reference voltage values ​​output by the reference terminals Vref of the first and second discrete power management circuits 15 and 24 are both set based on the differential signal and the minimum allowable voltage fluctuation value. By setting the reference voltage value output by the reference terminal Vref, stable differential signals can be output by the first differential signal converter 12 and the second differential signal converter 22. For example, if the differential signal range is ±1.2V and the minimum allowable voltage fluctuation value is 0.6V, the reference voltage value can be set to 1.8V.

[0046] According to an embodiment of the second aspect of the present invention, the earphone includes a power supply and differential signal transmission device of the first aspect of the present invention; the earphone can be a headset, a Bluetooth headset, etc., and the earphone includes a left earphone and a right earphone, with a battery disposed in the left earphone or the right earphone. Since the power supply signal VCC can be transmitted in both the first signal transmission module 100 and / or the second signal transmission module 200, only one of the left and right earphones needs to be equipped with a battery, thereby saving space and reducing the overall weight.

[0047] The earphone of the present invention, by setting up a power supply and differential signal transmission device in the same network, saves the power signal VCC terminal in the interface, allowing the earphone to transmit more data and realize more functions with a limited number of interfaces.

[0048] In summary, this invention integrates differential signals and power supply for transmission, and then uses a combined transformer to separate the combined signal into differential signals and power supply, thereby achieving the transmission of power supply and differential signals and saving transmission lines and interfaces. At the same time, the differential signal converter can also convert the signal into a single-ended signal, thereby reducing signal interference in high-speed signal transmission and ensuring the accuracy of signal transmission.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements to equivalent power supply and differential signal network transmission devices and headphones made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power supply and differential signal transmission network device, characterized in that, It includes a first signal transmission module and a second signal transmission module; The first signal transmission module includes a first transmitting transformer and a first coupling power management circuit. The middle tap of the input terminal of the first transmitting transformer is grounded, and the middle tap of the output terminal of the first transmitting transformer is electrically connected to the output terminal of the first coupling power management circuit. The input terminal of the first transmitting transformer is connected to a differential signal, and the first coupling power management circuit transmits a power signal to the first transmitting transformer, so that the first transmitting transformer outputs a coupled differential signal and a power signal. The second signal transmission module includes a second receiving transformer and a second discrete power management circuit. The input terminal of the second receiving transformer is electrically connected to the output terminal of the first transmitting transformer to receive coupled differential signals and power signals. The middle tap of the input terminal of the second receiving transformer is electrically connected to the input terminal of the second discrete power management circuit to separate the power signal. The middle tap of the output terminal of the second receiving transformer is electrically connected to the reference terminal of the second discrete power management circuit, so that the second receiving transformer outputs a differential signal. The first signal transmission module further includes a first differential signal converter and a first data processor that are electrically connected, and the first differential signal converter is electrically connected to the input terminal of the first transmitting transformer; The second signal transmission module further includes a second differential signal converter and a second data processor that are electrically connected, the second differential signal converter being electrically connected to the output terminal of the second receiving transformer; The first signal transmission module further includes a first receiving transformer and a first discrete power management circuit. The middle tap at the input end of the first receiving transformer is electrically connected to the input end of the first discrete power management circuit to separate the power signal. The middle tap at the output end of the first receiving transformer is electrically connected to the reference end of the first discrete power management circuit, so that the first receiving transformer outputs a differential signal. The second signal transmission module further includes a second transmitting transformer and a second coupling power management circuit. The middle tap of the input terminal of the second transmitting transformer is grounded, and the middle tap of the output terminal of the second transmitting transformer is electrically connected to the output terminal of the second coupling power management circuit. The input terminal of the second transmitting transformer is connected to a differential signal, and the second coupling power management circuit transmits a power signal to the second receiving transformer, so that the second receiving transformer outputs a coupled differential signal and a power signal. The first signal transmission module further includes a first handshake recognition circuit, which is electrically connected to the enable terminal of the first separate power management circuit and electrically connected to the first data processor. The second signal transmission module further includes a second handshake identification circuit, which is electrically connected to the enable terminal of the second discrete power management circuit and electrically connected to the second data processor. When the first handshake identification circuit and the second handshake identification circuit successfully handshake, an enable signal is transmitted to the first separate power management circuit or the second separate power management circuit, causing the first separate power management circuit or the second separate power management circuit to output at least one voltage signal according to the power signal.

2. The power supply and differential signal transmission device according to claim 1, characterized in that, The first handshake identification circuit and the second handshake identification circuit are wirelessly connected.

3. The power supply and differential signal transmission device according to claim 1, characterized in that, The first transmitting transformer and the second receiving transformer have the same structure.

4. The power supply and differential signal transmission device according to claim 1, characterized in that, The first receiving transformer and the second transmitting transformer have the same structure.

5. The power supply and differential signal transmission device according to claim 1, characterized in that, The reference voltage values ​​output from the reference terminals of the first and second separate power management circuits are both set based on the differential signal and the minimum allowable voltage fluctuation value.

6. An earphone, characterized in that, Includes the power supply and differential signal transmission device according to any one of claims 1 to 5.

7. The earphone according to claim 6, characterized in that, It includes a left earphone and a right earphone, wherein either the left earphone contains a battery or the right earphone contains a battery.

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