A microphone phantom power adapter device with high compatibility and an audio system

Abstract

This utility model discloses a highly compatible microphone phantom power adapter and audio system. The adapter includes a first interface, a second interface, and an adapter circuit. The first interface is connected to a microphone device, and the second interface is connected to an audio device. The phantom power voltage provided by the audio device to the adapter is higher than the rated voltage of the microphone device. The adapter circuit is positioned between the first and second interfaces. The adapter circuit is used to step down the phantom power voltage to a target voltage, where the difference between the target voltage and the rated voltage is within the allowable voltage fluctuation range of the microphone device. The solution provided by this utility model can convert the phantom power voltage provided by the audio device to the adapter to a target voltage suitable for the microphone device, avoiding damage to the microphone device caused by high voltage due to direct connection between the audio device and the microphone device. It also does not limit the type of microphone and has wide applicability.

Description

Technical Field

[0001] This utility model relates to the field of audio technology, and in particular to a highly compatible microphone phantom power adapter and audio system. Background Technology

[0002] Microphones, as an important component of audio systems, are widely used in users' lives and work.

[0003] Most existing microphones are designed with either low-voltage (e.g., 5V) or high-voltage (e.g., 48V) interfaces. If you want to use a low-voltage microphone (i.e., a microphone with a low-voltage interface) on a high-voltage powered audio device, there are currently two methods: one is to directly connect the low-voltage microphone to the high-voltage powered audio device, but this method is easily damaged by overvoltage due to the low voltage microphone's limited power tolerance. The other method is to use capacitor isolation / signal coupling, but this method is only suitable for active microphones, not passive microphones. Utility Model Content

[0004] This invention provides a highly compatible microphone phantom power adapter and audio system, which can convert the voltage of the phantom power supplied by the audio device to the adapter to the target voltage suitable for the microphone device. This avoids damage to the microphone device caused by high voltage due to direct connection between the audio device and the microphone device, and does not limit the type of microphone, thus having wide applicability.

[0005] According to one aspect of this utility model, a highly compatible microphone phantom power adapter is provided, comprising: a first interface, a second interface, and an adapter circuit; wherein,

[0006] The first interface is connected to the microphone device, and the second interface is connected to the audio device. The phantom power voltage provided by the audio device to the adapter is greater than the rated voltage of the microphone device.

[0007] The adapter circuit is located between the first and second interfaces; the adapter circuit is used to step down the voltage of the phantom power supply to the target voltage, the difference between the target voltage and the rated voltage being within the voltage fluctuation range allowed by the microphone device.

[0008] Optionally, the adapter circuit includes: a signal sampling unit, a signal coupling unit, a voltage processing unit, and a signal loopback unit;

[0009] The first interface is electrically connected to the signal sampling unit and the signal coupling unit, respectively. The signal sampling unit is electrically connected to the voltage processing unit, and the voltage processing unit is electrically connected to the signal loopback unit. The second interface is electrically connected to the signal coupling unit, the voltage processing unit, and the signal loopback unit, respectively.

[0010] Optionally, the first interface is a 3.5mm audio jack, and the second interface is a XLR plug;

[0011] The first and second pins of the 3.5mm audio jack are electrically connected to the signal sampling unit and the signal coupling unit, and the third pin of the 3.5mm audio jack is grounded.

[0012] The L pin of the XLR connector is electrically connected to the signal coupling unit and the voltage processing unit, respectively. The R pin of the XLR connector is electrically connected to the voltage processing unit and the signal loopback unit, respectively. The G pin of the XLR connector is grounded.

[0013] Optionally, the signal coupling unit includes a first capacitor;

[0014] One end of the first capacitor is electrically connected to the first and second pins of the 3.5mm audio jack, and the other end of the first capacitor is electrically connected to the L pin of the XLR connector.

[0015] Optionally, the signal sampling unit includes a first resistor;

[0016] One end of the first resistor is electrically connected to the first and second pins of the 3.5mm audio jack, and the other end of the first resistor is electrically connected to the voltage processing unit.

[0017] Optionally, the voltage processing unit includes a second resistor, a third resistor, a second capacitor, and a Zener diode;

[0018] One end of the second resistor is electrically connected to the other end of the first capacitor, and the other end of the second resistor is electrically connected to the other end of the first resistor.

[0019] One end of the third resistor is electrically connected to the other end of the first resistor, and the other end of the third resistor is electrically connected to the R pin of the XLR connector.

[0020] The other end of the second capacitor is electrically connected to the other end of the first resistor, and one end of the second capacitor is grounded.

[0021] The input terminal of the Zener diode is grounded, and the output terminal of the Zener diode is electrically connected to the other end of the first resistor.

[0022] Optionally, the signal loopback unit includes a fourth resistor and a third capacitor;

[0023] One end of the fourth resistor is electrically connected to the R pin of the XLR connector, and the other end of the fourth resistor is electrically connected to the other end of the third capacitor. One end of the third capacitor is grounded.

[0024] Optionally, the target voltage range is 3.3V-5.5V.

[0025] According to another aspect of the present invention, an audio system is provided, including a microphone device, an audio device, and a microphone phantom power adapter device with high compatibility with any of the above embodiments.

[0026] Optionally, the microphone device can be an active microphone or a passive microphone;

[0027] The audio device is any one of the following: mixing console, electronic musical instrument, speaker, sound card; the audio device is a highly compatible microphone phantom power adapter that provides phantom power at a voltage of 48V.

[0028] The technical solution of this utility model embodiment is to design a highly compatible microphone phantom power adapter that connects a microphone device and an audio device. The adapter includes a first interface, a second interface, and an adapter circuit. On the one hand, because the adapter circuit reduces the voltage of the phantom power supplied by the audio device to the adapter to the target voltage, the difference between the target voltage and the rated voltage of the microphone device is within the allowable voltage fluctuation range of the microphone device. Therefore, damage to the microphone device caused by high voltage due to direct connection between the audio device and the microphone device is avoided. On the other hand, the adapter circuit only converts the voltage of the phantom power supplied by the audio device to the adapter to the target voltage suitable for the microphone device, without isolating the power supply. Therefore, when the microphone device is a passive microphone, it will not affect the power supply from the audio device to the microphone device, and has wide applicability.

[0029] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a highly compatible microphone phantom power adapter provided in Embodiment 1 of this utility model;

[0032] Figure 2 This is a schematic diagram of another highly compatible microphone phantom power adapter provided in Embodiment 1 of this utility model;

[0033] Figure 3This is a circuit diagram of a highly compatible microphone phantom power adapter provided in Embodiment 1 of this utility model. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0035] It should be noted that the terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] Example 1

[0037] This invention provides a highly compatible microphone phantom power adapter, which is positioned between a microphone device and an audio device to enable interconnection between them. In this invention, the microphone device is a device capable of audio acquisition; it can be an active microphone (i.e., a microphone type that operates without external power) or a passive microphone (i.e., a microphone type that requires external power). The audio device is an audio device with power supply functionality.

[0038] In order to avoid voltage damage to microphone equipment and extend the service life of microphone equipment, this utility model designs a highly compatible microphone phantom power adapter. Figure 1 This is a schematic diagram of a highly compatible microphone phantom power adapter provided in Embodiment 1 of this utility model. Figure 1 As shown, the adapter 10 includes a first interface 101, a second interface 102, and an adapter circuit 103.

[0039] The first interface 101 is connected to the microphone device 20, and the second interface 102 is connected to the audio device 30. The phantom power voltage provided by the audio device 30 to the adapter 10 is greater than the rated voltage of the microphone device 20. The first interface 101 and the second interface 102 enable the connection between the adapter 10 and the microphone device 20 and the audio device 30.

[0040] An adapter circuit 103 is disposed between the first interface 101 and the second interface 102. The adapter circuit 103 is used to step down the phantom power voltage to a target voltage, the difference between the target voltage and the rated voltage being within the allowable voltage fluctuation range of the microphone device 20. That is, the voltage input from the second interface 102 to the adapter circuit 103 is the phantom power voltage, and the voltage output from the adapter circuit 103 to the first interface 101 is the target voltage. Since the difference between the target voltage and the rated voltage of the microphone device 20 is within the allowable voltage fluctuation range of the microphone device 20, the voltage at the first interface 101 will not damage the microphone device 20 regardless of whether the audio device 30 supplies power to it. In addition, the adapter circuit 103 also plays a role in stabilizing the voltage, ensuring the stability of the adapter and extending its service life.

[0041] Optionally, the allowable voltage fluctuation range can be determined according to the model of the microphone device 20, for example, the allowable voltage fluctuation range is -0.5V to 0.5V.

[0042] Optionally, the target voltage can range from 3.3V to 5.5V. For example, the target voltage can be 3.3V, 5V, 5.1V, or 5.5V.

[0043] In one embodiment, Figure 2 This is a schematic diagram of another highly compatible microphone phantom power adapter provided in Embodiment 1 of this utility model. Figure 2 As shown, the adapter circuit 103 includes: a signal sampling unit 1031, a signal coupling unit 1032, a voltage processing unit 1033, and a signal loopback unit 1034.

[0044] The first interface 101 is electrically connected to the signal sampling unit 1031 and the signal coupling unit 1032 respectively. The signal sampling unit 1031 is electrically connected to the voltage processing unit 1033. The voltage processing unit 1033 is electrically connected to the signal loopback unit 1034. The second interface 102 is electrically connected to the signal coupling unit 1032, the voltage processing unit 1033 and the signal loopback unit 1034 respectively.

[0045] In this invention, the voltage processing unit 1033 is used to reduce the voltage of the phantom power supply to the target voltage. The signal sampling unit 1031 can collect the audio signal input from the microphone device 20, the signal coupling unit 1032 is used to couple the audio signal to the subsequent circuit, and the signal loopback unit can be used to realize the signal loop to ensure the normal operation of the adapter.

[0046] In one embodiment, Figure 3 This is a circuit diagram of a highly compatible microphone phantom power adapter provided in Embodiment 1 of this utility model. Figure 3 As shown, the first interface 101 is a 3.5mm audio jack CN1, and the second interface 102 is a XLR connector CN2. The 3.5mm audio jack CN1 has three pins: pin 1, pin 2, and pin 3. The XLR connector CN2 also has three pins: pin L, pin R, and pin G.

[0047] The signal coupling unit 1032 includes a first capacitor C1; the signal sampling unit 1031 includes a first resistor R1; the voltage processing unit 1033 includes a second resistor R2, a third resistor R3, a second capacitor C2 and a Zener diode DZ; and the signal loopback unit 1034 includes a fourth resistor R4 and a third capacitor C3.

[0048] In this invention, the first capacitor C1, the second capacitor C2, and the third capacitor C3 can be either non-polarized or polarized capacitors. For example, the first capacitor C1, the second capacitor C2, and the third capacitor C3 can all be polarized capacitors, such as electrolytic capacitors.

[0049] Specifically, pin 1 and pin 2 of the 3.5mm audio jack CN1 are both electrically connected to one end of the first resistor R1 and the negative terminal of the first capacitor C1, and pin 3 of the 3.5mm audio jack CN1 is grounded. The L pin of the XLR connector CN2 is electrically connected to the positive terminal of the first capacitor C1 and one end of the second resistor R2 of the voltage processing unit 1033, the R pin of the XLR connector CN2 is electrically connected to the other end of the third resistor R3 of the voltage processing unit 1033 and one end of the fourth resistor R4 of the signal loopback unit 1034, and the G pin of the XLR connector CN2 is grounded.

[0050] One end of the first resistor R1 is electrically connected to the first pin 1 and the second pin 2 of the 3.5mm audio jack CN1. The other end of the first resistor R1 is electrically connected to the other end of the second resistor R2 of the voltage processing unit 1033, one end of the third resistor R3, the positive terminal of the second capacitor C2, and the output terminal of the Zener diode DZ.

[0051] One end of the second resistor R2 is electrically connected to the positive terminal of the first capacitor C1, that is, one end of the second resistor R2 is electrically connected to the L pin of the XLR connector CN2. The negative terminal of the second capacitor C2 is grounded. The input terminal of the Zener diode DZ is grounded. The other end of the fourth resistor R4 is electrically connected to the positive terminal of the third capacitor C3, and the negative terminal of the third capacitor C3 is grounded.

[0052] Figure 3 The working principle of the adapter shown is as follows: When the XLR plug CN2 is connected to the audio device, the voltage of the phantom power on the L pin and R pin is applied to the Zener diode DZ through the second resistor R2 and the third resistor R3, respectively. The Zener diode DZ stabilizes the voltage at the target voltage and filters out the noise signal on the voltage through the second capacitor C2.

[0053] When the microphone device 20 connected to the 3.5mm audio jack CN1 is a passive microphone, the target voltage provides a bias voltage to the passive microphone through the first resistor R1, and the passive microphone operates normally. The audio signal from the passive microphone is coupled to the L pin of the XLR connector CN2 through the first capacitor C1 and then input to the audio device. Since the XLR connector receives differential signals, the audio signal input through the L pin passes through the internal components of the audio device, via the R pin of the XLR connector, the fourth resistor R4, the third capacitor C3, and then to ground, forming a signal loop and completing the entire signal loop.

[0054] When the microphone device 20 connected to the 3.5mm audio jack CN1 is an active microphone, the active microphone can operate normally without a target voltage power supply. The audio signal from the active microphone is coupled to the L pin of the XLR connector CN2 through the first capacitor C1 and then input to the audio device. Since the XLR connector receives differential signals, the audio signal input at the L pin passes through the internal components of the audio device, via the R pin of the XLR connector, the fourth resistor R4, the third capacitor C3, and then to ground, forming a signal loop and completing the entire signal loop.

[0055] This utility model provides a highly compatible microphone phantom power adapter, including a first interface, a second interface, and an adapter circuit. The first interface is connected to a microphone device, and the second interface is connected to an audio device. The phantom power voltage provided by the audio device to the adapter is greater than the rated voltage of the microphone device. The adapter circuit is located between the first and second interfaces. The adapter circuit is used to step down the phantom power voltage to a target voltage, where the difference between the target voltage and the rated voltage is within the allowable voltage fluctuation range of the microphone device. This utility model provides a highly compatible microphone phantom power adapter connecting a microphone device and an audio device, comprising a first interface, a second interface, and an adapter circuit. On the one hand, because the adapter circuit reduces the phantom power voltage supplied by the audio device to the adapter to the target voltage, the difference between the target voltage and the microphone device's rated voltage is within the microphone device's allowable voltage fluctuation range. This avoids damage to the microphone device caused by high voltage due to direct connection between the audio device and the microphone device. On the other hand, the adapter circuit only converts the phantom power voltage supplied by the audio device to the adapter to the target voltage suitable for the microphone device, without isolating the power supply. Therefore, when the microphone device is a passive microphone, it will not affect the power supply from the audio device to the microphone device, making it widely applicable.

[0056] Example 2

[0057] This utility model embodiment also provides an audio system. The audio system includes the highly compatible microphone phantom power adapter device described in the above embodiments, and also includes a microphone device and an audio device. The specific structure of the highly compatible microphone phantom power adapter device and its connection relationship with the microphone device and audio device can be referred to the description of Embodiment 1 above, and will not be repeated here for the sake of brevity.

[0058] In one embodiment, the microphone device can be an active microphone or a passive microphone; the audio device can be any of the following: a mixing console, an electronic musical instrument, a speaker, or a sound card.

[0059] The audio equipment provides 48V phantom power to the highly compatible microphone phantom power adapter.

[0060] Optionally, the audio device can provide phantom power to a highly compatible microphone phantom power adapter at voltages of 12V, 24V, 36V, etc.

[0061] The technical solution of this utility model embodiment is to design a highly compatible microphone phantom power adapter that connects a microphone device and an audio device. The adapter includes a first interface, a second interface, and an adapter circuit. On the one hand, because the adapter circuit reduces the voltage of the phantom power supplied by the audio device to the adapter to the target voltage, the difference between the target voltage and the rated voltage of the microphone device is within the allowable voltage fluctuation range of the microphone device. Therefore, damage to the microphone device caused by high voltage due to direct connection between the audio device and the microphone device is avoided. On the other hand, the adapter circuit only converts the voltage of the phantom power supplied by the audio device to the adapter to the target voltage suitable for the microphone device, without isolating the power supply. Therefore, when the microphone device is a passive microphone, it will not affect the power supply from the audio device to the microphone device, and has wide applicability.

[0062] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A highly compatible microphone phantom power adapter, characterized in that, include: The system comprises a first interface, a second interface, and an adapter circuit; among which... The first interface is connected to a microphone device, and the second interface is connected to an audio device. The voltage of the phantom power provided by the audio device to the adapter is greater than the rated voltage of the microphone device. The adapter circuit is disposed between the first interface and the second interface; the adapter circuit is used to step down the voltage of the phantom power supply to a target voltage, the difference between the target voltage and the rated voltage being within the voltage fluctuation range allowed by the microphone device.

2. The highly compatible microphone phantom power adapter according to claim 1, characterized in that, The switching circuit includes: a signal sampling unit, a signal coupling unit, a voltage processing unit, and a signal loopback unit; The first interface is electrically connected to the signal sampling unit and the signal coupling unit, the signal sampling unit is electrically connected to the voltage processing unit, the voltage processing unit is electrically connected to the signal loopback unit, and the second interface is electrically connected to the signal coupling unit, the voltage processing unit, and the signal loopback unit.

3. The highly compatible microphone phantom power adapter according to claim 2, characterized in that, The first interface is a 3.5mm audio jack, and the second interface is an XLR connector; The first and second pins of the 3.5mm audio jack are both electrically connected to the signal sampling unit and the signal coupling unit, and the third pin of the 3.5mm audio jack is grounded. The L pin of the XLR connector is electrically connected to the signal coupling unit and the voltage processing unit, respectively. The R pin of the XLR connector is electrically connected to the voltage processing unit and the signal loopback unit, respectively. The G pin of the XLR connector is grounded.

4. The highly compatible microphone phantom power adapter according to claim 3, characterized in that, The signal coupling unit includes a first capacitor; One end of the first capacitor is electrically connected to the first and second pins of the 3.5mm audio jack, and the other end of the first capacitor is electrically connected to the L pin of the XLR connector.

5. The highly compatible microphone phantom power adapter according to claim 4, characterized in that, The signal sampling unit includes a first resistor; One end of the first resistor is electrically connected to the first and second pins of the 3.5mm audio jack, and the other end of the first resistor is electrically connected to the voltage processing unit.

6. The highly compatible microphone phantom power adapter according to claim 5, characterized in that, The voltage processing unit includes a second resistor, a third resistor, a second capacitor, and a Zener diode; One end of the second resistor is electrically connected to the other end of the first capacitor, and the other end of the second resistor is electrically connected to the other end of the first resistor; One end of the third resistor is electrically connected to the other end of the first resistor, and the other end of the third resistor is electrically connected to the R pin of the XLR connector. The other end of the second capacitor is electrically connected to the other end of the first resistor, and one end of the second capacitor is grounded; The input terminal of the Zener diode is grounded, and the output terminal of the Zener diode is electrically connected to the other end of the first resistor.

7. The highly compatible microphone phantom power adapter according to claim 6, characterized in that, The signal loopback unit includes a fourth resistor and a third capacitor; One end of the fourth resistor is electrically connected to the R pin of the XLR connector, and the other end of the fourth resistor is electrically connected to the other end of the third capacitor, with one end of the third capacitor grounded.

8. The highly compatible microphone phantom power adapter according to claim 1, characterized in that, The target voltage ranges from 3.3V to 5.5V.

9. An audio system, characterized in that, This includes microphone devices, audio devices, and a highly compatible microphone phantom power adapter as described in any one of claims 1-8.

10. The audio system according to claim 9, characterized in that, The microphone device is an active microphone or a passive microphone; The audio device is any one of the following: mixing console, electronic musical instrument, speaker, sound card; the phantom power supply voltage provided by the highly compatible microphone phantom power adapter is 48V.

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