Audio switch with partitioning function

Abstract

The utility model discloses an audio switch with a partition function, which is applied to the technical field of audio switches. Comprising a switch chip, a plurality of groups of independent power supplies and a plurality of signal output interfaces, the switch chip is provided with a plurality of partition groups, each partition group is correspondingly connected with one group of independent power supplies and one signal output interface, and each partition group comprises an independent high-level network port and an independent low-level network port. Each high-level network port and each low-level network port are connected with a low-dropout linear voltage regulator, and the low-dropout linear voltage regulators isolate the corresponding network ports to realize partition. According to the utility model, the isolation effect on other network ports is realized through the extremely strong inhibition effect of the high-performance LDO on noise, so that the real partition is realized, and the network ports do not influence each other.

Description

Technical Field

[0001] This utility model relates to the field of audio switch technology, and more specifically to an audio switch with partitioning function. Background Technology

[0002] Hi-Fi audio switches are increasingly favored by users who prefer low-noise audio. This is because consumer-grade Hi-Fi switches often have poor output signal accuracy and introduce significant noise, which can negatively impact the performance of high-end network audio equipment and, in severe cases, directly affect audio specifications. To improve the network signal quality of audio switches, the common practice is to modify the switch products for low-noise and high-precision Hi-Fi capabilities, transforming them into Hi-Fi grade audio switches. Existing methods include: 1. Using higher-precision reference-level clocks, such as ultra-low-noise SPXOs, TCXOs, and even OCXOs; 2. Implementing ultra-low-noise power supply designs for switch chips, ranging from around 1V to 1.8V and 3.3V, resulting in lower noise in the network output signal; 3. Employing more sophisticated PCB designs, multi-layer full isolation, thickened copper plating, and high-quality isolation transformers and network sockets, resulting in lower contact losses and improved signal output quality.

[0003] However, even so, HiFi audio switches remain susceptible to interference. As is well known, HiFi switches typically use a core low-voltage power supply of around 1V and 1.8V / 3.3V I / O power supplies. High-end network switches are usually partitioned, with one or two network interfaces using independent 1.8V / 3.3V I / O power supplies. For example, a 6-port high-end switch chip typically has 4 to 8 1.8V / 3.3V power supply interfaces, corresponding to 6 different network signal outputs and receives. In design, these 4 to 8 1.8V / 3.3V power supplies usually employ a low-noise design. This design has no problem with operational stability, but as a HiFi switch design, it has a fatal flaw: cross-contamination of noise. When all network I / O transmit and receive power supplies use the same power supply, if a network receive port is connected to a highly noisy network signal, the I / O-related power supply will also be affected. This directly contaminates the entire 1.8V / 3.3V power supply, affecting the other 5 network interfaces, thus contaminating these 4 network interfaces and making them inherently noisy. Therefore, how to provide an audio switch with zone functionality is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides an audio switch with partitioning function to solve the problems in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An audio switch with zone function includes: a switch chip, multiple independent power supplies, and multiple signal output interfaces. The switch chip is configured with multiple zone groups. Each zone group is connected to one of the independent power supplies and one signal output interface. Each zone group includes independent high-level network ports and low-level network ports. Each high-level network port and each low-level network port are connected to a low-dropout linear regulator. The low-dropout linear regulator enables the signal output interface of the corresponding zone group to achieve zoned operation.

[0007] Optionally, the high-level network port is AVDD33.

[0008] Optionally, the low-level network port is AVDDL.

[0009] Optionally, the voltage of the high-level network port is 3.3V.

[0010] Optionally, the voltage of the low-level network port is 0.95V.

[0011] Optionally, the signal output interface is an RJ45 interface.

[0012] As can be seen from the above technical solution, compared with the prior art, this utility model provides an audio switch with partitioning function, which uses an ultra-low noise LDO for isolation. If noise from a single network port affects a certain power supply, the high-performance LDO's strong noise suppression effect can achieve isolation of other network ports, thereby achieving true partitioning and preventing mutual interference. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the audio switch chip structure of this utility model;

[0015] Figure 2 This is a schematic diagram of a network port using existing technology.

[0016] Figure 3 This is a schematic diagram of the network port of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model discloses an audio switch with zone function, such as Figure 1 As shown, it includes: a switch chip, multiple independent power supplies, and multiple signal output interfaces. The switch chip is configured with multiple partition groups. Each partition group is connected to one independent power supply and one signal output interface. Each partition group includes independent high-level network ports and low-level network ports. Each high-level network port and each low-level network port are connected to a low-dropout linear regulator. The low-dropout linear regulator enables the signal output interface of the corresponding partition group to be partitioned.

[0019] Furthermore, the high-level network port is AVDD33.

[0020] Furthermore, the low-level network port is AVDDL.

[0021] Furthermore, the voltage of the high-level network port is 3.3V.

[0022] Furthermore, the voltage of the low-level network port is 0.95V.

[0023] Furthermore, the signal output interface is an RJ45 interface.

[0024] In existing audio switch chips, the four network ports have independent power supplies. DVDDL uses a low level of 0.95V, while AVDD33 uses a high level of 3.3V. Independent power supplies allow the four network ports to be independently partitioned without affecting each other. The same applies to fiber optic ports.

[0025] The existing solutions, such as Figure 2 As shown, if the power supply of one network port is interfered with by network noise, the entire 0.95V or 3.3V will be affected, thus affecting all four network ports; the solution of this utility model is as follows. Figure 3 As shown, due to the partitioning, the power supply for each network port is independent, ranging from a low level of 0.95V to a high level of 3.3V, thus achieving the function of partitioning each network port.

[0026] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An audio switch with zone functionality, characterized in that, include: The switch chip comprises multiple independent power supplies and multiple signal output interfaces. The switch chip is configured with multiple partition groups. Each partition group is connected to one independent power supply and one signal output interface. Each partition group includes independent high-level network ports and low-level network ports. Each high-level network port and each low-level network port are connected to a low-dropout linear regulator. The low-dropout linear regulator enables the signal output interface of the corresponding partition group to be partitioned.

2. An audio switch with zone function according to claim 1, characterized in that, The high-level network port is AVDD33.

3. An audio switch with zone function according to claim 1, characterized in that, The low-level network port is AVDDL.

4. An audio switch with zone function according to claim 1, characterized in that, The voltage of the high-level network port is 3.3V.

5. An audio switch with zone function according to claim 1, characterized in that, The voltage of the low-level network port is 0.95V.

6. An audio switch with zone function according to claim 1, characterized in that, The signal output interface is an RJ45 interface.

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