Printed circuit board

Abstract

The utility model provides a printed circuit board. The printed circuit board comprises a light plate; the connector, the filter circuit and the input interface are arranged on the light plate; the first through hole and the second through hole are used for detecting the filter circuit and arranged on the light plate, the first through hole is connected with the input interface, the second through hole is connected with the filter circuit, and the filter circuit is arranged between the first through hole and the second through hole. The beneficial effects of the utility model are that through the arrangement of the filter circuit, clutters with different frequencies can be effectively filtered out, the signal quality is improved, and the interference in the signal transmission process is reduced, thereby improving the performance and stability of the whole electronic equipment; the arrangement of the first through hole and the second through hole facilitates the detection and debugging of the filter circuit, so that the performance of the filter circuit can be monitored more conveniently, possible problems can be found and solved in time, the maintainability and production efficiency of products are improved, and the production cost is reduced. And the filter circuit can be quickly removed in emergency without influencing the operation of the whole system.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of printed circuit board design, especially a printed circuit board. BACKGROUND

[0002] In modern electronic devices, with the rapid development of electronic technology, the function of electronic devices is increasingly powerful, the integration degree is continuously improved, and the working frequency is also higher and higher. However, this development also brings a series of electromagnetic compatibility (EMC) problems. Various electronic components will produce electromagnetic interference of different frequencies in the working process, which will not only affect the normal operation of the device itself, but also may have adverse effects on other electronic devices around. Therefore, the filter circuit plays a crucial role in electronic devices, which can effectively suppress electromagnetic interference and ensure the stable and reliable operation of electronic devices.

[0003] Printed circuit board (PCB) as an indispensable part of electronic devices is the carrier of electronic components and the basis of electrical connection. Building a filter circuit on the PCB not only considers the performance of the filter circuit itself, but also fully combines the characteristics of the PCB to achieve the best filtering effect. Traditional filter circuits usually use surface mount devices (SMD) or plug-in components for layout and connection on the surface of the PCB. However, this conventional design method has certain limitations. For high-frequency signals, the parasitic capacitance and inductance between surface mount components will have a significant impact on the filtering effect. For example, at high frequencies, the parasitic inductance of component pins will cause increased signal reflection and loss, reducing the performance of the filter circuit. In addition, with the trend of miniaturization of electronic devices, the space on the PCB is increasingly compact, and the limited space makes it difficult for traditional surface layout methods to meet the design needs of complex filter circuits.

[0004] In summary, further research and innovation are needed on printed circuit boards to overcome the shortcomings of existing technology and meet the growing demand for high-performance filter circuits in electronic devices. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides a kind of printed circuit board, especially suitable as the filter of the power supply of output connector module end.

[0006] The technical scheme adopted by the utility model is: first, a kind of printed circuit board is provided, comprising:

[0007] Light plate;

[0008] Connector, filter circuit and input interface are arranged on the light plate;

[0009] A first through hole and a second through hole are used to detect the filter circuit and are disposed on the optical board. The first through hole is connected to the input interface and the second through hole is connected to the filter circuit. The filter circuit is disposed between the first through hole and the second through hole.

[0010] Furthermore, the filter circuit includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and an inductor. One end of the inductor is connected to the first through hole and the input interface, and the other end is connected to the second through hole and the connector. The first capacitor, the second capacitor, and the third capacitor are connected in parallel between the inductor and the input interface, and the fourth capacitor, the fifth capacitor, and the sixth capacitor are connected in parallel between the inductor and the connector.

[0011] Furthermore, the first capacitor and the fourth capacitor are 100uF / 50V electrolytic capacitors.

[0012] Furthermore, the second capacitor and the fifth capacitor are 0.33uF / 50V tantalum capacitors.

[0013] Furthermore, the third capacitor and the sixth capacitor are 100pF / 50V ceramic capacitors.

[0014] The advantages and positive effects of this utility model are as follows: By adopting the above technical solution and setting a filter circuit, it is possible to effectively filter out noise of different frequencies, improve signal quality, reduce interference during signal transmission, and thus improve the performance and stability of the entire electronic device; the setting of the first and second through holes facilitates the testing and debugging of the filter circuit, making it easier to monitor the performance of the filter circuit during manufacturing and subsequent equipment maintenance, promptly identify and resolve potential problems, and improve product maintainability and production efficiency; the setting of the first and second through holes also allows for the rapid removal of the filter circuit in emergency situations without affecting the operation of the entire system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a printed circuit board according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of a filter circuit according to an embodiment of the present invention. Detailed Implementation

[0017] The present disclosure will now be described more fully with reference to the accompanying drawings, which illustrate exemplary embodiments of the present disclosure. The technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative effort are within the scope of protection of the present disclosure.

[0018] like Figure 1 As shown, this utility model provides a printed circuit board, comprising:

[0019] Plain plate;

[0020] Connector 300, filter circuit 200 and input interface 100 are mounted on the optical board;

[0021] The first through hole 400 and the second through hole 500 are used to detect the filter circuit 200 and are set on the optical board. The first through hole 400 is connected to the input interface 100 and the second through hole 500 is connected to the filter circuit 200. The filter circuit 200 is set between the first through hole 400 and the second through hole 500.

[0022] Using the above-described apparatus, a suitable optical board is selected as the basic support component for the printed circuit board. A first through-hole 400 and a second through-hole 500 are fabricated on the optical board. The first through-hole 400 and the second through-hole 500 can be formed by methods including, but not limited to, mechanical drilling and laser drilling. Their dimensions and positional accuracy must meet the probe access requirements of the testing equipment. The first through-hole 400 is connected to the input interface 100 via conductive lines on the optical board, ensuring that the input signal can be transmitted to the first through-hole 400. The second through-hole 500 is connected to the circuit containing the filter circuit 200 to detect the output signal of the filter circuit 200. This position and connection method of the through-holes allows for the detection of whether the input signal has reached the input terminal of the filter circuit normally through the first through-hole 400, and the detection of the signal processed by the filter circuit through the second through-hole 500 during circuit board testing. The placement of the first through hole 400 and the second through hole 500 facilitates the testing and debugging of the filter circuit. This allows for easier monitoring of the filter circuit's performance during manufacturing and subsequent equipment maintenance, enabling timely detection and resolution of potential problems. It also improves product maintainability and production efficiency, and allows for the rapid removal of the filter circuit in emergency situations without affecting the operation of the entire system.

[0023] To address the issues of poor signal quality and interference during signal transmission, this embodiment provides an implementation method.

[0024] In one embodiment, the filter circuit 200 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and an inductor L1. One end of the inductor L1 is connected to the first through-hole 400 and the input interface 100, and the other end is connected to the second through-hole 500 and the connector 300. The first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in parallel between the inductor L1 and the input interface 100, and the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 are connected in parallel between the inductor L1 and the connector 300.

[0025] By using the above-mentioned device and setting up a filtering circuit, it is possible to effectively filter out noise of different frequencies, improve signal quality, reduce interference during signal transmission, and thus improve the performance and stability of the entire electronic device.

[0026] To address the functional differences caused by using different capacitors and inductors in the filter circuit, this embodiment provides an implementation method.

[0027] In one embodiment, the first capacitor and the fourth capacitor are 100uF / 50V electrolytic capacitors.

[0028] In one embodiment, the second capacitor and the fifth capacitor are 0.33uF / 50V tantalum capacitors.

[0029] In one embodiment, the third capacitor and the sixth capacitor are 100pF / 50V ceramic capacitors.

[0030] By using the above-mentioned device and capacitors of different types and specifications, the filtering requirements of different frequency ranges can be more comprehensively covered, the filtering effect is optimized, and the reliability of the circuit is improved.

[0031] The following description, in conjunction with a preferred embodiment, illustrates the content involved in the above embodiments.

[0032] Prepare a blank board and form conductive lines on it using processes such as printing and etching to provide electrical pathways for the subsequent installation and connection of components. Install connector 300 and input interface 100 in the designated positions on the blank board according to design requirements. Process the first through hole 400 and the second through hole 500 on the blank board to ensure accurate positioning and good connection with input interface 100 and filter circuit 200. The first through hole 400 and the second through hole 500 can be formed by mechanical drilling or laser drilling, and their size and positional accuracy must meet the probe access requirements of the detection equipment. For the assembly of filter circuit 200, first connect the inductor to one side of the first through hole 400 and input interface 100, and simultaneously connect its other end to one side of the second through hole 500 and connector 300. Then, connect the first capacitor C1, the second capacitor C2, and the third capacitor C3 in parallel between the inductor and the input interface. Finally, connect the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 in parallel between the inductor L1 and connector 300. During welding and assembly, it is crucial to ensure welding quality and avoid issues such as incomplete soldering and short circuits. The first capacitor C1 and the fourth capacitor C4 are 100uF / 50V electrolytic capacitors. The positive and negative terminals of electrolytic capacitors must be correctly connected. Their large capacitance allows them to store and release charge, smoothing low-frequency signals and reducing power supply ripple. The second capacitor C2 and the fifth capacitor C5 are 0.33uF / 50V tantalum capacitors. Tantalum capacitors have high stability and low equivalent series resistance (ESR), making them suitable for filtering mid-to-low frequency signals. The third capacitor C3 and the sixth capacitor C6 are 100pF / 50V ceramic capacitors. Ceramic capacitors have excellent high-frequency characteristics and can effectively filter out high-frequency noise.

[0033] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A printed circuit board, characterized in that, include: Plain plate; Connectors, filtering circuits, and input interfaces are mounted on the optical board; A first through hole and a second through hole are used to detect the filter circuit and are disposed on the optical board. The first through hole is connected to the input interface and the second through hole is connected to the filter circuit. The filter circuit is disposed between the first through hole and the second through hole.

2. The printed circuit board according to claim 1, characterized in that: The filtering circuit includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and an inductor. One end of the inductor is connected to the first through hole and the input interface, and the other end is connected to the second through hole and the connector. The first capacitor, the second capacitor, and the third capacitor are connected in parallel between the inductor and the input interface, and the fourth capacitor, the fifth capacitor, and the sixth capacitor are connected in parallel between the inductor and the connector.

3. The printed circuit board according to claim 2, characterized in that: The first capacitor and the fourth capacitor are 100uF / 50V electrolytic capacitors.

4. The printed circuit board according to claim 2, characterized in that: The second capacitor and the fifth capacitor are 0.33uF / 50V tantalum capacitors.

5. The printed circuit board according to claim 2, characterized in that: The third capacitor and the sixth capacitor are 100pF / 50V ceramic capacitors.

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