WO2013185610A1

WO2013185610A1 - Audio signal transmission device

Info

Publication number: WO2013185610A1
Application number: PCT/CN2013/077148
Authority: WO
Inventors: 李东声
Original assignee: 天地融科技股份有限公司
Priority date: 2012-06-13
Filing date: 2013-06-13
Publication date: 2013-12-19
Also published as: CN202720898U; HK1181967A2

Abstract

Provided in the present invention is an audio signal transmission device. The device comprises an audio interface and a USB interface. The audio interface and the USB interface have connected therebetween a transformer. The USB interface is connected to an audio receiver device. The USB interface is also connected to an audio transmitter device. The audio interface comprises an audio output pin and a ground pin. The audio output pin comprises a left audio channel and/or a right audio channel. Because an audio signal is amplified by the transformer before the audio signal is received by the USB interface, the audio signal outputted from the audio interface is ensured to be correctly received by the USB interface. DTRAWING: Fig. 1: AA Audio interface BB Transformer CC USB interface

Description

Audio signal transmission device

Technical field

The present invention relates to the field of electronic technologies, and in particular, to an audio signal transmission apparatus. Background technique

In the existing electronic products, a USB (Universal Serial BUS) interface is often included, and a mobile terminal (a mobile terminal includes: a mobile terminal, a tablet, etc.) often includes an audio interface, and the audio interface is generally an audio signal. Input and output interface. If the electronic product needs to be connected to the mobile terminal, the signal output from the audio interface of the mobile terminal needs to be connected to the USB interface, and then converted, so that the mobile terminal with the audio interface matches the electronic product with the USB interface. the goal of.

However, due to the particularity of the USB interface, the sensitivity of the demand is 200mv, and 200mv is too large for the audio signal. Therefore, the audio signal output by the existing mobile terminal cannot meet the sensitivity requirement.

Therefore, there is a need for a device that can match an audio signal output by an audio interface to a USB interface. Summary of the invention

The present invention aims to solve at least one of the above technical problems.

Accordingly, it is an object of the present invention to provide an audio signal transmission apparatus.

In order to achieve the above object, an audio signal transmission apparatus according to an embodiment of the present invention includes an audio interface and a USB interface; and a transformer is connected between the audio interface and the USB interface.

Furthermore, the USB interface is connected to an audio receiving device.

In addition, the USB interface is also connected to an audio transmitting device.

Additionally, the audio interface includes an audio output pin and a ground pin, and the audio output pin includes a left channel and/or a right channel.

In addition, the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the D-pin and the D+ pin of the USB interface.

In addition, the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the VBUS pin and the D- pin of the USB interface.

In addition, the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the VBUS pin and the D+ pin of the USB interface.

In addition, the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the D-pin and the ground pin of the USB interface.

In addition, the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the D+ pin and the ground pin of the USB interface.

Additionally, the audio interface also includes a microphone pin.

In addition, the microphone pin is also connected to the D-pin or D+ pin of the USB interface. The present invention also provides an audio signal transmission apparatus, which comprises replacing a USB interface in any of the above devices with a DOCK interface.

According to the audio signal transmission apparatus of the embodiment of the invention, before the audio signal is received by the USB interface, the audio signal is amplified by the transformer, so that the audio signal output from the audio interface can be correctly received by the USB interface.

In addition, since the transformer is a passive device, there is no power consumption during operation.

In addition, the use of a transformer to amplify the audio signal before receiving the audio signal on the USB interface also solves the problem of common mode between the audio interface of the mobile phone and the USB interface.

The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic structural view of Embodiment 1 of an audio signal transmission apparatus according to the present invention;

2 is a schematic structural view of Embodiment 2 of an audio signal transmission apparatus according to the present invention;

3 is a first schematic structural view of Embodiment 3 of an audio signal transmission apparatus according to the present invention;

4 is a second schematic structural view of Embodiment 3 of an audio signal transmission apparatus according to the present invention;

Figure 5 is a block diagram showing the structure of an embodiment 4 of an audio signal transmitting apparatus according to the present invention;

Figure 6 is a block diagram showing the structure of an embodiment 5 of an audio signal transmission apparatus according to the present invention;

Figure 7 is a block diagram showing the structure of an embodiment 6 of an audio signal transmitting apparatus according to the present invention;

Figure 8 is a block diagram showing the structure of an embodiment 7 of an audio signal transmitting apparatus according to the present invention;

Figure 9 is a block diagram showing the structure of an eighth embodiment of an audio signal transmitting apparatus according to the present invention;

Figure 10 is a diagram showing the DOCK interface of Embodiment 9 of the audio signal transmitting apparatus according to the present invention. detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that the terms "connected" and "connected" are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral, unless otherwise specifically defined and defined. Ground connection; can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. The specific meanings of the above terms in the present invention can be understood in the specific circumstances by those skilled in the art. Further, in the description of the present invention, "multiple" means two or more unless otherwise stated. An authentication method according to an embodiment of the present invention is described below with reference to the accompanying drawings.

Example 1

1 is a schematic structural diagram of an audio signal transmission apparatus of the present invention. Referring to FIG. 1, an audio signal transmission apparatus includes an audio interface and a USB interface.

The audio interface includes an audio output pin AUDIO and a ground pin AGND, and the audio output pin generally includes a left channel pin and/or a right channel pin.

The USB interface includes: power supply pin VBUS, first signal pin D-, second signal pin D+, and ground pin UGND.

A transformer is connected between the audio interface and the USB interface.

Audio output pin of the audio interface AUDIO and ground pin AGND is connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the first signal pin D- of the USB interface and the second signal pin D.

Ground pin of audio interface AGND and ground pin of USB interface UGND common ground GND.

Since the audio signal is amplified by the transformer before the USB interface receives the audio signal transmitted by the audio interface, it can ensure that the audio signal output from the audio interface satisfies the sensitivity requirement of the USB interface and ensures that it can be correctly received by the USB interface.

In addition, the use of a transformer to amplify the audio signal before receiving the audio signal on the USB interface also solves the problem of common mode between the audio interface of the mobile phone and the USB interface. Example 2

2 is a schematic structural diagram of an audio signal transmission apparatus according to the present invention. Referring to FIG. 2, the difference between this embodiment and Embodiment 1 is that an audio interface is connected to an audio signal transmitting apparatus, and a USB interface is connected to an audio signal receiving apparatus.

Thus, it can be seen that the downlink transmission of the audio signal can be realized by the audio signal transmission apparatus of the present invention. Example 3

3 is a schematic structural diagram of an audio signal transmission apparatus according to the present invention. Referring to FIG. 3, the difference between the embodiment and the embodiment 1 is that the audio interface further includes a microphone pin MIC, and the microphone pin MIC is also connected to the second signal tube of the USB interface. Foot D+.

Specifically, the microphone pin MIC of the audio interface is connected to the second signal pin D+ of the USB interface through the first capacitor C1 and the resistor R, and the ground pin AGND of the audio interface is connected to the second interface of the USB interface through the second capacitor C2 and the resistor R. Signal pin D+.

The range of the first capacitor C 1 is: l OOpF-lOOuF The second capacitor C2 ranges from 100pF to 100uF, and the range of resistance is: 10ΚΩ-500ΚΩ, and further 50ΚΩ-100ΚΩ.

Among them, the capacitor can also be replaced by a resistor and other devices, and the resistor can be replaced by a capacitor or the like.

The microphone pin MIC of the audio interface of the embodiment is connected to the signal pin of the USB interface, and the sound can be realized. Uplink transmission of frequency signals. Of course, in this embodiment, referring to FIG. 4, the microphone pin MIC of the audio interface can also be connected to the first signal pin D- of the USB interface.

Example 4

5 is a schematic structural diagram of an audio signal transmission apparatus according to the present invention. Referring to FIG. 5, the difference between this embodiment and Embodiment 3 is that the audio interface is connected to the audio signal receiving apparatus, and the USB interface is connected to the audio signal transmitting apparatus.

Thus, it can be seen that the uplink transmission of the audio signal can be realized by the audio signal transmission apparatus of the present invention. Example 5

6 is a schematic structural diagram of an audio signal transmission apparatus of the present invention. Referring to FIG. 6, the difference between this embodiment and Embodiment 1 is that the secondary coil of the transformer is connected to the VBUS pin and the D-pin of the USB interface.

Of course, in this embodiment, the audio interface may also include a microphone pin MIC, and the microphone pin MIC is connected to the first signal pin D- of the USB interface.

Of course, in this embodiment, the audio interface may also be connected to the audio signal transmitting device or the audio signal receiving device, and the USB interface may also be connected to the audio signal receiving device matched with the device connected to the audio interface or connected to the audio signal transmitting device. In order to ensure that the uplink and downlink transmission of the audio signal can be performed. Example 6

7 is a schematic structural view of an audio signal transmission apparatus of the present invention. Referring to FIG. 7, the difference between this embodiment and Embodiment 1 is that the secondary coil of the transformer is connected to the VBUS pin and the D+ pin of the USB interface.

Of course, in this embodiment, the audio interface may also include a microphone pin MIC, and the microphone pin MIC is connected to the second signal pin D+ of the USB interface.

Of course, in this embodiment, the audio interface may also be connected to the audio signal transmitting device or the audio signal receiving device, and the USB interface may also be connected to the audio signal receiving device matched with the device connected to the audio interface or connected to the audio signal transmitting device. In order to ensure that the uplink and downlink transmission of the audio signal can be performed. Example 7

8 is a schematic structural view of an audio signal transmission apparatus of the present invention. Referring to FIG. 8, the difference between this embodiment and Embodiment 1 is that the secondary coil of the transformer is connected to the D-pin and the ground pin of the USB interface.

Of course, in this embodiment, the audio interface may also be connected to the audio signal transmitting device or the audio signal receiving device, and the USB interface may also be connected to the audio signal receiving device matched with the device connected to the audio interface or connected to the audio signal transmitting device. In order to ensure that the uplink and downlink transmission of the audio signal can be performed. Example 8

9 is a schematic structural view of an audio signal transmission apparatus of the present invention. Referring to FIG. 9, the difference between this embodiment and Embodiment 1 is that the secondary coil of the transformer is connected to the D+ pin and the ground pin of the USB interface.

Of course, in this embodiment, the audio interface may also be connected to the audio signal transmitting device or the audio signal receiving device, and the USB interface may also be connected to the audio signal receiving device matched with the device connected to the audio interface or connected to the audio signal transmitting device. In order to ensure that the uplink and downlink transmission of the audio signal can be performed. Example 9

The USB interface in the audio signal transmission device described in Embodiment 1-8 is replaced with a DOCK interface, and the DOCK interface is shown in FIG.

In this embodiment, the connection between the DOCK interface and the audio interface is implemented by replacing the USB interface shown in Figure 1-9 with the DOCK interface shown in Figure 10. In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.

Claims

claims

1. An audio signal transmission device, characterized by:

Includes audio interface and USB interface;

A transformer is connected between the audio interface and the USB interface.

2. The device according to claim 1, wherein the USB interface is connected to an audio receiving device.

3. The device according to claim 2, characterized in that the USB interface is also connected to an audio sending device.

4. The device according to any one of claims 1 to 3, characterized in that, the audio interface includes an audio output pin and a ground pin, and the audio output pin includes a left channel and/or a right channel. .

5. The device according to claim 4, characterized in that: the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the D of the USB interface. - pin and D+ pin.

6. The device according to claim 4, characterized in that: the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the VBUS of the USB interface. pins and D-pins.

7. The device according to claim 4, characterized in that: the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the VBUS of the USB interface. pin and the D+ pin.

8. The device according to claim 4, characterized in that: the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the D of the USB interface. - pins and ground pins.

9. The device according to claim 4, characterized in that: the audio output pin and the ground pin of the audio interface are connected to the primary coil of the transformer, and the secondary coil of the transformer is connected to the D of the USB interface. Ten pins and ground pins.

10. The device according to any one of claims 1 to 3, characterized in that the audio interface further includes a microphone pin.

11. The device according to claim 10, wherein the microphone pin is also connected to the D-pin or EH pin of the USB interface.

12. An audio signal transmission device, characterized by: replacing the USB interface in the device described in any one of claims 1-11 with a DOCK interface.