A device for using inductance of a filter circuit of a power amplifier IC

Abstract

The utility model discloses a kind of inductance using device for power amplifier IC filter circuit, it is related to the inductance using technical field of filter circuit. Including mounting frame, the top surface of mounting frame is fixedly connected with circuit board, the top surface of circuit board is fixedly connected with capacitor, the top surface of circuit board is fixedly connected with battery, further include CD inductance component, the top surface of mounting frame is set to CD inductance component, for current filtering steady current, plug-in frame component, the bottom surface of CD inductance component is set to plug-in frame component, for improving inductance plug-in efficiency, by the CD inductance component set, so as to facilitate to realize replacement to NR inductance under the premise of not changing other peripheral devices, to reduce magnetic adhesive material, reduce processing cost, by the plug-in frame component set, so as to facilitate to be inserted into the inner wall of circuit board when plug-in frame component is plugged, to shorten processing time, improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of inductor application technology in filter circuits, specifically an inductor application device for power amplifier IC filter circuits. Background Technology

[0002] In the power amplifier IC filter circuit, the inductor is a key component, playing an important role in filtering out high-frequency noise and stabilizing signal transmission. In order to control production costs, traditional circuits often use unshielded power inductors. These inductors have a significant advantage in material cost because they eliminate the need for magnetic shielding structure, and are widely used in various mid-to-low-end audio devices.

[0003] In existing technologies, the coils of unshielded inductors are directly exposed, generating an alternating magnetic field that radiates outwards during operation. When multiple inductors are arranged close together in a circuit, the magnetic fields overlap to form a strong source of interference. This interference can easily couple to the signal path of the power amplifier IC, causing problems such as noise and distortion in the audio output. Traditional devices lack targeted anti-interference design and only alleviate the problem by increasing the spacing between components or simply adding a shielding cover. This not only fails to completely eliminate magnetic field radiation but also occupies more circuit space and increases manufacturing costs. Therefore, there is an urgent need for an inductor-based device for power amplifier IC filtering circuits to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an inductor application device for power amplifier IC filter circuits, so as to solve the problem that traditional filter circuits using cost-reducing unshielded power inductors cannot solve the EMC problem as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an inductor-using device for a power amplifier IC filter circuit, comprising a mounting bracket, a circuit board fixedly connected to the top surface of the mounting bracket, a capacitor fixedly connected to the top surface of the circuit board, a battery fixedly connected to the top surface of the circuit board, and further comprising: The CD inductor assembly, located on the top surface of the mounting bracket, is used for filtering and stabilizing the current. The insert assembly is disposed on the bottom surface of the CD inductor assembly to improve the inductor insertion efficiency.

[0006] Preferably, the CD inductor assembly includes multiple magnetic core columns, all of which are fixedly connected to the top surface of the circuit board. The lower end of each magnetic core column has an inlet hole, the upper end of each magnetic core column has an outlet hole, and the inner wall of each magnetic core column is fitted with enameled wire.

[0007] Preferably, the insert assembly includes two insertion feet, both of which are fixedly connected to the lower end of the magnetic core column. The lower end of each insertion foot has a deformation groove, and the two ends of the enameled wire are fixedly connected to the inner wall of the insertion foot, respectively.

[0008] Preferably, both ends of the enameled wire are fixedly connected to the inner walls of the inlet and outlet holes, respectively, and the multiple enameled wires are wound clockwise from bottom to top.

[0009] Preferably, the top surface of the circuit board has multiple labels, and the mounting direction of the magnetic core column matches the direction pointed to by the arrow of the label.

[0010] Preferably, the top surface of the mounting bracket is provided with a shielding component, the shielding component including a protective box, and a permalloy protective block is fixedly connected to the inner wall of the protective box.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The CD inductor assembly allows for easy replacement of the NR inductor without altering other peripheral components, thereby reducing the amount of magnetic adhesive material and lowering processing costs. The insert assembly facilitates quick insertion into the inner wall of the circuit board, thus shortening processing time and improving processing efficiency. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the shielding component structure of this utility model; Figure 3 This is a schematic diagram of the CD inductor assembly structure of this utility model; Figure 4 This is a schematic diagram of the insert assembly structure of this utility model.

[0013] In the diagram: 1. Mounting bracket; 2. Circuit board; 3. Capacitor; 301. Battery; 4. CD inductor assembly; 401. Core post; 402. Inlet hole; 403. Outlet hole; 404. Enamelled wire; 405. Label; 5. Socket assembly; 501. Insertion pin; 502. Deformation groove; 6. Shielding assembly; 601. Protective box; 602. Permalloy protective block. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1 - Figure 4 This utility model provides an inductor application device for a power amplifier IC filter circuit, including a mounting bracket 1, a circuit board 2 fixedly connected to the top surface of the mounting bracket 1, a capacitor 3 fixedly connected to the top surface of the circuit board 2, a battery 301 fixedly connected to the top surface of the circuit board 2, and a CD inductor assembly 4. The CD inductor assembly 4 is disposed on the top surface of the mounting bracket 1 and is used for filtering and stabilizing the current. A plug-in assembly 5 is disposed on the bottom surface of the CD inductor assembly 4 to improve the inductor insertion efficiency. The CD inductor assembly 4 facilitates the replacement of NR inductors without changing other peripheral components, thereby reducing magnetic adhesive material and lowering processing costs. The plug-in assembly 5 facilitates quick insertion into the inner wall of the circuit board 2 when plugging in the plug-in assembly, thereby shortening processing time and improving processing efficiency.

[0016] Furthermore, the CD inductor assembly 4 includes multiple magnetic core pillars 401, all of which are fixedly connected to the top surface of the circuit board 2. The lower end of each magnetic core pillar 401 has an inlet hole 402, and the upper end has an outlet hole 403. Enamelled wire 404 is sleeved on the inner wall of each magnetic core pillar 401, with both ends of the wire fixedly connected to the inner walls of the inlet hole 402 and the outlet hole 403, respectively. The multiple enamelled wires 404 are wound clockwise from bottom to top. Multiple labels 405 are provided on the top surface of the circuit board 2, and the mounting direction of the magnetic core pillars 401 matches the direction indicated by the arrows on the labels 405. Through the configured CD inductor assembly 4, the... The low-pass filter circuit uses four CD inductors with the same electrical specifications as the NR inductors, thus replacing the NR inductors without changing other peripheral components. The CD inductors do not require magnetic glue to seal the coils, leaving the coils exposed, thereby reducing the cost of magnetic glue materials and processes, and lowering manufacturing costs. The inlet hole 402 and outlet hole 403 work together to ensure that the winding direction of the multiple enameled wires 404 is consistent. The label 405 is used to match the direction of the magnetic core post 401 when it is mounted, so that the polarities of the four inductors are mounted in opposite directions, which facilitates the cancellation of magnetic fields after power is applied, meeting EMC requirements.

[0017] Furthermore, the insert assembly 5 includes two insertion pins 501, both of which are fixedly connected to the lower end of the magnetic core column 401. The lower end of the insertion pin 501 is provided with a deformation groove 502. The two ends of the enameled wire 404 are fixedly connected to the inner wall of the insertion pin 501 respectively. Through the insertion assembly 5, the insertion pin 501 undergoes a slight deformation through the deformation groove 502 when the magnetic core column 401 is inserted, which facilitates the quick insertion of the insertion pin 501 into the interior of the circuit board 2, thereby shortening the processing time and improving the processing efficiency.

[0018] Furthermore, a shielding component 6 is provided on the top surface of the mounting bracket 1. The shielding component 6 includes a protective box 601. A permalloy protective block 602 is fixedly connected to the inner wall of the protective box 601. The shielding component 6 facilitates the shielding of the CD inductor component 4 from the outside world through the protective box 601 and the permalloy protective block 602, thereby reducing the probability of the CD inductor component 4 being interfered with. It should be noted that the permeability of the 602 permalloy protective block is dozens of times that of silicon steel, which provides better shielding against ultra-low frequency magnetic fields.

[0019] Working principle: In use, the CD inductor assembly 4 enables the low-pass filter circuit to use four CD inductors with the same electrical specifications as the NR inductors, thus replacing the NR inductors without changing other peripheral components. The CD inductors do not require magnetic glue to seal the coils, leaving the coils exposed, thereby reducing the cost of magnetic glue materials and processes, and lowering manufacturing costs. At the same time, the inlet hole 402 and outlet hole 403 work together to ensure that the winding direction of the multiple enameled wires 404 is consistent. The label 405 is used to match the direction of the magnetic core post 401 when it is mounted, so that the polarities of the four inductors are mounted in opposite directions, which facilitates the mutual cancellation of magnetic fields after power is applied, meeting EMC requirements.

[0020] By using the insert assembly 5, the core post 401 undergoes a slight deformation of the insertion pin 501 through the deformation groove 502 during insertion, which facilitates the quick insertion of the insertion pin 501 into the circuit board 2, thereby shortening the processing time and improving processing efficiency.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An inductor application device for a power amplifier IC filter circuit, comprising a mounting bracket (1), characterized in that, The mounting bracket (1) has a circuit board (2) fixedly connected to its top surface, a capacitor (3) fixedly connected to its top surface, and a battery (301) fixedly connected to its top surface. It also includes: CD inductor assembly (4), which is disposed on the top surface of the mounting bracket (1), is used to filter and stabilize the current. The insert assembly (5) is disposed on the bottom surface of the CD inductor assembly (4) to improve the inductor insertion efficiency.

2. The inductor application device for a power amplifier IC filter circuit according to claim 1, characterized in that: The CD inductor assembly (4) includes multiple magnetic cores (401), all of which are fixedly connected to the top surface of the circuit board (2). The lower end of each magnetic core (401) is provided with an inlet hole (402), the upper end of each magnetic core (401) is provided with an outlet hole (403), and the inner wall of each magnetic core (401) is fitted with an enameled wire (404).

3. The inductor application device for a power amplifier IC filter circuit according to claim 2, characterized in that: The insert assembly (5) includes two insert pins (501), both of which are fixedly connected to the lower end of the magnetic core column (401). The lower end of the insert pin (501) is provided with a deformation groove (502), and the two ends of the enameled wire (404) are fixedly connected to the inner wall of the insert pin (501).

4. The inductor application device for a power amplifier IC filter circuit according to claim 2, characterized in that: The two ends of the enameled wire (404) are fixedly connected to the inner walls of the inlet hole (402) and the outlet hole (403), respectively, and the multiple enameled wires (404) are wound clockwise from bottom to top.

5. The inductor application device for a power amplifier IC filter circuit according to claim 2, characterized in that: The top surface of the circuit board (2) is provided with multiple labels (405), and the mounting direction of the magnetic core column (401) matches the direction pointed to by the arrow of the label (405).

6. The inductor application device for a power amplifier IC filter circuit according to claim 1, characterized in that: The top surface of the mounting bracket (1) is provided with a shielding component (6), the shielding component (6) includes a protective box (601), and a permalloy protective block (602) is fixedly connected to the inner wall of the protective box (601).

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