Printed circuit board design method and related device
A technology for printed circuit boards and design methods, applied in computer-aided design, computing, electrical digital data processing, etc., can solve problems such as difficult adjustment, unfavorable component development and management, and achieve low adjustment difficulty, energy and material resources. Effect
Pending Publication Date: 2021-05-14
IFLYTEK CO LTD
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Problems solved by technology
[0003] In related technologies, in order to increase the output frequency of the crystal oscillator as much as possible, different types of chips can be matched based on the equivalent capacitance corresponding to the PCB, so that the equivalent capacitance corresponding to the PCB is consistent with the rated capacitance of the crystal oscillator in the chip. However, this method requires frequent adjustment of the chip model, which is difficult to adjust and is not conducive to the development and management of components
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Embodiment Construction
[0058] Embodiments of the present application are described below in conjunction with the accompanying drawings.
[0059] Printed circuit board (hereinafter referred to as PCB) is an important part of electronic equipment. As electronic equipment is becoming more and more popular, how to improve the production efficiency and precision of PCB is the key issue concerned by relevant personnel. In the related art, in order to increase the output frequency of the crystal oscillator in the chip mounted on the PCB, it is necessary to match the equivalent capacitance outside the crystal oscillator with the rated capacitance inside the crystal oscillator. Among them, the equivalent capacitance outside the crystal oscillator mainly includes the equivalent load capacitance C of the chip crystal oscillator interface. ic and stray capacitance on the PCB C pcb , because the capacitance distribution inside the chip is relatively fixed, so C ic Usually it is a fixed value for each type of c...
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The embodiment of the invention discloses a printed circuit board design method and a related device. The method comprises the following steps: determining a rated capacitor corresponding to a first crystal oscillator in a target chip loaded by a target printed circuit board; determining a first equivalent capacitance corresponding to the target printed circuit board; and if it is determined that the difference value between the first equivalent capacitance and the rated capacitance exceeds the first preset range, adjusting the physical structure of the target printed circuit board, so that the difference value between the second equivalent capacitance corresponding to the adjusted target printed circuit board and the rated capacitance does not exceed the first preset range. According to the invention, when the equivalent capacitance corresponding to the target printed circuit board and the rated capacitance corresponding to the crystal oscillator differ greatly, the physical structure of the target printed circuit board is adjusted based on the rated capacitance, so that the adjusted equivalent capacitance is close to the rated capacitance as much as possible; and therefore, the output frequency of the crystal oscillator in the chip can be expanded to a certain extent by changing the physical structure of the target printed circuit board with relatively low adjustment difficulty.
Description
technical field [0001] The present application relates to the technical field of circuit design, in particular to a printed circuit board design method and related devices. Background technique [0002] Printed Circuit Board (PCB for short) is one of the most basic components of current electronic equipment. Chips required for the operation of electronic equipment are often installed on the PCB. The chip usually has a crystal oscillator as a clock component. In order to make the output frequency of the crystal oscillator reach the rated frequency required by the chip, it is necessary to keep the rated capacitance corresponding to the crystal oscillator consistent with the equivalent capacitance of the external load. [0003] In related technologies, in order to increase the output frequency of the crystal oscillator as much as possible, different types of chips can be matched based on the equivalent capacitance corresponding to the PCB, so that the equivalent capacitance cor...
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Login to View More IPC IPC(8): G06F30/398
CPCG06F30/398
Inventor 邢朝路吴国栋林敏
Owner IFLYTEK CO LTD