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How to define standards for high-speed circuit boards and low-speed circuit boards?

2023-10-17

1. The concept of high-speed circuit board and low-speed circuit board

High-speed circuit boards refer to circuit boards that work at high frequency and high speed, such as DDR3, DDR4, PCIE and other common applications. The low-speed circuit board refers to the circuit board that works at low frequency and low speed, such as single-chip microcomputer development board, household appliance control board, etc.

Two, the definition standard of high-speed circuit board and low-speed circuit board

The definition criteria of high-speed circuit boards and low-speed circuit boards mainly depend on parameters such as signal clock frequency, signal transmission rate, signal rising edge and falling edge time. Specifically, it can be judged according to the following four parameters:

1. Signal clock frequency: When the operating frequency of the circuit board is greater than 50MHz, it is generally considered a high-speed circuit board; when the operating frequency of the circuit board is less than 50MHz, it is generally considered a low-speed circuit board.

2. Signal transmission rate: When the signal transmission rate exceeds 1Gbps, it can be considered as a high-speed circuit board; when the signal transmission rate is less than 1Gbps, it can be considered as a low-speed circuit board.

3. Signal rising edge/falling edge time: The signal rising edge/falling edge time is an important factor affecting the signal transmission rate. When the signal rising edge/falling edge time is less than 500ps, it can be considered as a high-speed circuit board. If it is greater than 500ps, it can be considered as a high-speed circuit board. It is a low speed circuit board.

4. Signal integrity: High-speed circuit boards are prone to signal distortion during signal transmission, which requires higher precision and stability in the design and manufacture of high-speed circuit boards.

Through the above analysis, we can conclude that the definition standards of high-speed circuit boards and low-speed circuit boards mainly depend on parameters such as signal clock frequency, signal transmission rate, signal rising edge and falling edge time. When designing and manufacturing high-speed circuit boards, it is necessary to pay attention to signal integrity issues and improve the accuracy and stability of the circuit board. In practical applications, try to design and manufacture according to the defined standards to ensure the stability and reliability of the circuit board.

In short, the definition standard of high-speed circuit boards and low-speed circuit boards is an important issue, which needs to be discussed and resolved by circuit board manufacturers and designers. Only by mastering the definition standards of high-speed circuit boards and low-speed circuit boards can we better deal with various challenges encountered in circuit board manufacturing and design. It is believed that with the continuous advancement of technology, the design and manufacturing level of high-speed circuit boards and low-speed circuit boards will continue to improve, providing better support and guarantee for the development and application of electronic technology.

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