Power supply and differential signal same-network transmission device and earphone

Abstract

The invention discloses a power supply and differential signal same-network transmission device and an earphone. The device comprises a first signal transmission module and a second signal transmission module, the first signal transmission module comprises a first sending transformer and a first coupling power supply management circuit, the first sending transformer accesses a differential signal, and the first coupling power supply management circuit transmits a power supply signal to the first sending transformer so as to output the coupled differential signal and power supply signal; the second signal transmission module comprises a second receiving transformer and a second separation power supply management circuit, the input end of the second receiving transformer is connected with a differential signal and a power supply signal which are coupled, and the second separation power supply management circuit separates the power supply signal from the second receiving transformer; the second separation power management circuit outputs at least one voltage signal according to the power signal; according to the invention, the power line signal and the differential signal are coupled and then transmitted, so that interface terminals are saved, and the earphone can transmit more data and realize more functions by using a limited number of interfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of smart earphones, and in particular to a power supply and differential signal transmission device over a network. Background Art

[0002] With the increasing development of electronic products, there are various products on the market, and the functions are becoming more and more diversified and refined. As a result, some product designs do not have enough communication lines or interfaces, resulting in the inability to accommodate too many signal lines or power line interfaces, such as headphones. As a result, some products have to change their original designs and reduce some functions. Summary of the invention

[0003] In view of the above-mentioned deficiencies, the technical problem to be solved by the present invention is: to provide a power supply and differential signal network transmission device and headphones, which couple the power line number and the differential signal together for transmission, thereby saving the interface terminal occupied by the power signal input, so that the headphones can utilize the limited number of interfaces, transmit more data, and realize more functions.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] A power supply and differential signal network transmission 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 middle tap of the input end of the first transmitting transformer is grounded, the middle tap of the output end of the first transmitting transformer is electrically connected to the output end of the first coupling power management circuit, the input end of the first transmitting transformer is connected to the differential signal, the first coupling power management circuit transmits 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 separation power management circuit, the input end of the second receiving transformer is electrically connected to the output end of the first transmitting transformer to receive the coupled differential signal and power signal; the middle tap of the input end of the second receiving transformer is electrically connected to the input end of the second separation power management circuit to separate the power signal, the middle tap of the output end of the second receiving transformer is electrically connected to the reference end of the second separation power management circuit, so that the second receiving transformer outputs the differential signal; and the second separation power management circuit outputs at least one voltage signal according to the power signal.

[0006] Preferably, the first signal transmission module also includes an electrically connected first differential signal converter and a first data processor, and the first differential signal converter is electrically connected to the input end of the first transmitting transformer; the second signal transmission module also includes an electrically connected second differential signal converter and a second data processor, and the second differential signal converter is electrically connected to the output end of the second receiving transformer.

[0007] Preferably, the first signal transmission module also includes a first receiving transformer and a first separation power management circuit, the middle tap of the input end of the first receiving transformer is electrically connected to the input end of the first separation power management circuit to separate the power signal, and the middle tap of the output end of the first receiving transformer is electrically connected to the reference end of the first separation power management circuit, so that the first receiving transformer outputs a differential signal; and the first separation power management circuit outputs at least one voltage signal according to the power signal; the second signal transmission module also includes a second transmitting transformer and a second coupling power management circuit, the middle tap of the input end of the second transmitting transformer is grounded, the middle tap of the output end of the second transmitting transformer is electrically connected to the output end of the second coupling power management circuit, the input end of the second transmitting transformer is connected to the differential signal, and the second coupling power management circuit transmits the power signal to the second receiving transformer, so that the second receiving transformer outputs the coupled differential signal and power signal.

[0008] A preferred embodiment is that the first signal transmission module also includes a first handshake identification circuit, which is electrically connected to the enable end of the first separation power management circuit; the second signal transmission module also includes a second handshake identification circuit, which is electrically connected to the enable end of the second separation power management circuit; the first handshake identification circuit shakes hands successfully with the second handshake identification circuit, and transmits an enable signal to the first separation power management circuit or the second separation power management circuit, so that the first separation power management circuit or the second separation power management circuit outputs at least one voltage signal according to the power signal.

[0009] Preferably, the first handshake identification circuit and the second handshake identification circuit are connected by wireless communication.

[0010] Preferably, the first transmitting transformer and the second receiving transformer have the same structure.

[0011] Preferably, the first receiving transformer and the second transmitting transformer have the same structure.

[0012] Preferably, the reference voltage values ​​outputted by the reference terminals of the first separate power management circuit and the second separate power management circuit are both set according to the differential signal and the minimum voltage fluctuation allowable value.

[0013] A headset comprises the above-mentioned power supply and differential signal network transmission device.

[0014] A 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] Since the power supply and differential signal of the present invention are transmitted on the same network as the device and the 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 is used to access 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 the power signal; the second signal transmission module includes a second receiving transformer and a second separation power management circuit, the input end of the second receiving transformer is connected to the coupled differential signal and the power signal, the second separation power management circuit separates the power signal from the second receiving transformer, and ensures that the second receiving transformer outputs the differential signal transmitted by the first signal transmission module; and the second separation power management circuit outputs at least one voltage signal according to the power signal to meet different working voltage requirements; because the present invention couples the power line number and the differential signal together for transmission, the interface terminal occupied by the power signal input is saved, so that the earphone uses a limited number of interfaces to transmit more data and realize more functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a principle block diagram of the power supply and differential signal network transmission device in the present invention;

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

[0019] In the figure: 100-first signal transmission module, 10-first receiving transformer, 11-first transmitting transformer, 12-first differential signal converter, 13-first data processor, 14-first coupling power management circuit, 15-first separation 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 separation power management circuit, 25-second coupling power management circuit, 26-second handshake identification circuit. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0022] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to 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 comprises a first signal transmission module 100 and a second signal transmission module 200 .

[0024] The first signal transmission module 100 includes a first transmission transformer 11 and a first coupling power management circuit 14. The middle tap of the input end of the first transmission transformer 11 is grounded GND, and the middle tap of the output end of the first transmission transformer 11 is electrically connected to the output end of the first coupling power management circuit 14. The input end of the first transmission transformer 11 is connected to the differential signal. The first coupling power management circuit 14 transmits the power signal VCC to the first transmission transformer 11, so that the first transmission transformer 11 outputs the coupled differential signal and power signal. In the present invention, the first signal transmission module 100 also includes a first differential signal converter 12 and a first data processor 13. The input end of the first differential signal converter 12 is electrically connected to the input end of the first transmission transformer 11, and the output end 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 separation power management circuit 24. The input end of the second receiving transformer 20 is electrically connected to the output end of the first transmitting transformer 11 to receive the coupled differential signal and the power signal. The middle tap of the input end of the second receiving transformer 20 is electrically connected to the input end of the second separation power management circuit 24 to separate the power signal VCC. The middle tap of the output end of the second receiving transformer 20 is electrically connected to the reference end Vref of the second separation power management circuit 24, so that the second receiving transformer 20 outputs a differential signal. In the present invention, the second signal transmission module 200 also includes a second differential signal converter 22 and a second data processor 23. The input end of the second differential signal converter 22 is electrically connected to the output end of the second receiving transformer 20, and the output end of the second differential signal converter 22 is electrically connected to the second data processor 23.

[0026] In the present invention, the first differential signal converter 12 and the second differential signal converter 22 mainly convert single-channel signals to differential signals, reduce interference of high-speed signals during transmission over longer distances, and protect signal data from loss during transmission.

[0027] In the present 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 increase different operating voltages, such as 3.3V, 5V, etc.; and indirectly realize multiple functions.

[0028] In a preferred solution, the first transmitting transformer 11 and the second receiving transformer 20 have the same structure, which reduces the impact on the differential signal during the transmission process 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 work with the network transmission device, the power supply signal and the differential signal are integrated and separated through the first transmitting transformer 11 and the second receiving transformer 20, wherein the first signal transmission module 100 is used to send the coupled power supply signal and the differential signal, and the second signal transmission module 200 is used to separate the power supply signal and the 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 signal is transmitted to the input end of the first transmitting transformer 11, and a power supply VCC is superimposed at the center of the output end of the first transmitting transformer 11. This power supply VCC is output by the first coupling power management circuit 14 and then transmitted to the second receiving transformer 20. At this time, it is equivalent to adding a power supply bias to the output signal. In addition, when the first signal transmission module 100 and the second signal transmission module 200 are not limited to transmitting the differential signal described above.

[0031] The differential signal with the bias power supply is transmitted to the second receiving transformer 20, and a signal is drawn out at the center of the second receiving transformer 20 to the second separation power management circuit 24. This signal is the power supply VCC that follows the signal transmission. The second separation power management circuit 24 has the input voltage VCC, and then outputs the corresponding other power supplies to power the first signal transmission module 100, and can also power 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 at the output of the transformer is a normal AC signal without a bias voltage. The Vref bias voltage output by the second separation power management circuit 24 is given to the midpoint of the output end of the second receiving transformer 20, so that the signals of the two output ports of the second receiving transformer 20 can be above the 0 level, and then 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] It can be seen that the present invention couples the power line signal with the differential signal for transmission, which saves the interface terminal occupied by the power signal VCC input, utilizes the limited number of interfaces, transmits more data, and realizes more functions. Figure 2 As shown, in some embodiments of the present invention, the first signal transmission module 100 also includes a first receiving transformer 10 and a first separation power management circuit 15, the middle tap of the input end of the first receiving transformer 10 is electrically connected to the input end of the first separation power management circuit 15 to separate the power signal VCC, the middle tap of the output end of the first receiving transformer 10 is electrically connected to the reference end Vref of the first separation power management circuit 15, so that the first receiving transformer 10 outputs a differential signal; and the first separation power management circuit 15 outputs at least one voltage signal according to the power signal VCC.

[0033] 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 end of the second transmitting transformer 21 is grounded GND, and the middle tap of the output end of the second transmitting transformer 21 is electrically connected to the output end of the second coupling power management circuit 25. The input end of the second transmitting transformer 21 is connected to the differential signal, and the transmission 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 the coupled differential signal and power signal.

[0034] In a preferred solution, the first receiving transformer 10 and the second transmitting transformer 21 have the same structure, which reduces the impact on the differential signal during the transmission process and ensures the stability of the differential signal transmission.

[0035] In these embodiments, the first signal transmission module 100 has the functions of sending and receiving signals, and the second signal transmission module 200 also has the functions of sending and receiving signals. When the power supply and differential signal and network transmission device of the present invention are applied to headphones, the two headphones have the same functions, and interfaces, internal functional modules, etc. can be set according to actual needs.

[0036] like Figure 2 As shown, in some embodiments of the present invention, the first signal transmission module 100 also includes a first handshake identification circuit 16, which is electrically connected to the enable end of the first separation power management circuit 15, and the first handshake identification circuit 16 can be electrically connected to the first data processor 13; the second signal transmission module 200 also includes a second handshake identification circuit 26, which is electrically connected to the enable end of the second separation power management circuit 24, and the first handshake identification circuit 16 can be electrically connected to the first data processor 13.

[0037] The first handshake identification circuit 16 and the second handshake identification circuit 26 handshake successfully, and transmit an enable signal to the first separate power management circuit 15 or the second separate power management circuit 24, so that the first separate power management circuit 15 or the second separate power management circuit 24 outputs at least one voltage signal according to the power signal VCC.

[0038] In a preferred solution, the first handshake identification circuit 16 and the second handshake identification circuit 26 are connected by wireless communication, for example, the first handshake identification circuit 16 and the second handshake identification circuit 26 are connected by Bluetooth communication.

[0039] The power and differential signal transmission device of the present invention is applied to earphones. When the earphones include a left earphone and a right earphone, the first signal transmission module 100 can be arranged in the left earphone, and the second signal transmission module 200 can be arranged in the right earphone. When the first signal transmission module 100 sends the coupled power signal and the differential signal to the second signal transmission module 200, the second separation power management module can separate the power signal VCC, and can output the required working voltage signal according to the needs of the earphone.

[0040] When the first handshake identification circuit 16 and the second handshake identification circuit 26 are working, after the handshake between the first handshake identification circuit 16 and the second handshake identification circuit 26 is successful, the second handshake identification circuit 26 transmits an enable signal to the second separate power management, so that the second separate power management can output a voltage signal to provide the power signal VCC (working voltage) to the right earphone. When the handshake between the first handshake identification circuit 16 and the second handshake identification circuit 26 is unsuccessful, 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, which indicates that the left earphone and the right earphone cannot be used together. Of course, when the handshake between the first handshake identification circuit 16 and the second handshake identification circuit 26 is unsuccessful, 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 transmits a corresponding electrical signal to the second data processor 23 to notify the right earphone.

[0041] 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.

[0042] When the second signal transmission module 200 is used as a data sending module and the first signal transmission module 100 is used as a data receiving module, whether the first separation power management circuit 15 outputs a voltage signal can also be controlled by the first handshake recognition circuit 16 according to the above principle.

[0043] It should be particularly 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 recognition circuit may not be provided, and identification may be performed by pairing between Bluetooth headsets. Specifically, the enable ends of the first separate power management circuit 15 and the second separate power management circuit 24 may be controlled by the Bluetooth module.

[0044] In some embodiments of the present invention, the reference voltage values ​​outputted by the reference terminals Vref of the first separate power management circuit 15 and the second separate power management circuit 24 are set according to the differential signal and the minimum voltage fluctuation allowable value. By setting the reference voltage value outputted by the reference terminal Vref, it is possible to ensure that the first differential signal converter 12 and the second differential signal converter 22 output stable differential signals. For example, if the range of the differential signal is ±1.2V and the minimum voltage fluctuation allowable value is 0.6V, the reference voltage value can be set to 1.8V.

[0045] According to an embodiment of the second aspect of the present invention, the earphone includes the power supply and differential signal network transmission device of the first aspect of the present invention; the earphone can be a headset, a Bluetooth earphone, etc., and the earphone includes a left earphone and a right earphone, and a battery is set in the left earphone, or a battery is set in the right earphone. Because the first signal transmission module 100 and / or the second signal transmission module 200 can transmit the power signal VCC, only one of the left earphone and the right earphone needs to be set with a battery, thereby saving space and reducing the overall weight.

[0046] The earphone of the present invention is provided with a power supply and differential signal network transmission device, thereby saving the terminal of the power supply signal VCC in the interface, so that the earphone can utilize a limited number of interfaces to transmit more data and realize more functions.

[0047] In summary, the present invention transmits the differential signal and the power supply together, and then separates the combined signal into the differential signal and the power supply through a combined transformer after transmission, thereby realizing the transmission of the power supply and the differential signal, saving the transmission line and the interface; at the same time, the signal can also be converted into a single-ended signal through a differential signal converter, thereby reducing the signal interference of the high-speed signal during transmission and ensuring the accuracy of the signal transmission.

[0048] The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications made within the spirit and principles of the present invention, improvements to the power supply and differential signal and network transmission device and headphones, etc., should be included in the protection scope of the present invention.

Claims

1. A power supply and differential signal transmission device, characterized in that: comprising a first signal transmission module and a second signal transmission module; The first signal transmission module includes a first transmission transformer and a first coupling power management circuit, the middle tap of the input end of the first transmission transformer is grounded, the middle tap of the output end of the first transmission transformer is electrically connected to the output end of the first coupling power management circuit, the input end of the first transmission transformer is connected to the differential signal, and the first coupling power management circuit transmits the power signal to the first transmission transformer, so that the first transmission transformer outputs the coupled differential signal and the power signal; The second signal transmission module includes a second receiving transformer and a second separation power management circuit, wherein the input end of the second receiving transformer is electrically connected to the output end of the first transmitting transformer to receive the coupled differential signal and the power signal; the middle tap of the input end of the second receiving transformer is electrically connected to the input end of the second separation power management circuit to separate the power signal, and the middle tap of the output end of the second receiving transformer is electrically connected to the reference end of the second separation power management circuit, so that the second receiving transformer outputs a differential signal; And the second separate power management circuit outputs at least one voltage signal according to the power signal.

2. The power supply and differential signal network transmission device according to claim 1, characterized in that: The first signal transmission module further includes a first differential signal converter and a first data processor which are electrically connected, wherein the first differential signal converter is electrically connected to an input end of the first transmitting transformer; The second signal transmission module further includes a second differential signal converter and a second data processor which are electrically connected, and the second differential signal converter is electrically connected to the output end of the second receiving transformer.

3. The power supply and differential signal network transmission device according to claim 2, characterized in that: The first signal transmission module further includes a first receiving transformer and a first separation power management circuit, wherein an intermediate tap at an input end of the first receiving transformer is electrically connected to an input end of the first separation power management circuit to separate a power signal, and an intermediate tap at an output end of the first receiving transformer is electrically connected to a reference end of the first separation power management circuit, so that the first receiving transformer outputs a differential signal; And the first separation power management circuit outputs at least one voltage signal according to the power signal; The second signal transmission module also includes a second transmitting transformer and a second coupling power management circuit. The middle tap of the input end of the second transmitting transformer is grounded, and the middle tap of the output end of the second transmitting transformer is electrically connected to the output end of the second coupling power management circuit. The input end of the second transmitting transformer is connected to the differential signal, and the second coupling power management circuit transmits the power signal to the second receiving transformer, so that the second receiving transformer outputs the coupled differential signal and power signal.

4. The power supply and differential signal network transmission device according to claim 3, characterized in that: The first signal transmission module further includes a first handshake identification circuit, and the first handshake identification circuit is electrically connected to the enable terminal of the first separation power management circuit; The second signal transmission module further includes a second handshake identification circuit, and the second handshake identification circuit is electrically connected to the enable terminal of the second separation power management circuit; The first handshake identification circuit shakes hands successfully with the second handshake identification circuit, and transmits an enable signal 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.

5. The power supply and differential signal network transmission device according to claim 4, characterized in that: The first handshake identification circuit and the second handshake identification circuit are connected by wireless communication.

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

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

8. The power supply and differential signal network transmission device according to claim 3, characterized in that: The reference voltage values ​​outputted by the reference terminals of the first separate power management circuit and the second separate power management circuit are both set according to the differential signal and the minimum voltage fluctuation allowable value.

9. A headset, characterized in that: The invention comprises the power supply and differential signal network transmission device as described in any one of claims 1 to 8.

10. The earphone according to claim 9, characterized in that The invention comprises a left earphone and a right earphone, wherein a battery is arranged in the left earphone or a battery is arranged in the right earphone.

Images