Method and device for determining parameters on printed circuit board (PCB)
A printed circuit board and PCB board technology, applied in the server field, can solve the problems of reducing the simulation accuracy of link signals and not taking into account the high and low impedance changes of transmission link channels, etc.
Active Publication Date: 2019-12-03
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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Problems solved by technology
For signal simulation, usually design link and Intel PDG (Platform Design guide, Platform Design Guide) corresponding link for CQC (Channel Quality Comparison, channel quality comparison) simulation comparison, CQC simulation comparison method is easy to operate, and the simulation The time cost is relatively small, and the applicability of the CQC method is better under the rapid development of the project and the variability of program requirements, but the disadvantage is that only a single median impedance variable is considered for the signal transmission link channel on the PCB board. The simulation comparison does not take into account the difference in the impedance of the transmission link channel during PCB board processing, so the simulation accuracy of the link signal will be reduced
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[0052] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0053]The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.
[0054] figure 1 It is the flow chart of high-speed signal simulation CQC in the prior art. According to the flow chart, it is designed and developed for the current server motherboard. Due to the improvement of high-speed signal transmission rate, in order to ensure the tran...
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The invention discloses a method and a device for determining parameters on a printed circuit board (PCB). The method comprises the following steps of: importing a high-speed signal of a signal transmission link on the PCB; establishing a link model according to the channel parameter variable of the transmission link, and obtaining a simulation program corresponding to a platform design instruction PDG link; obtaining an analog value of the link model and an output value of the simulation program respectively according to the imported high-speed signal, the established link model and the simulation program; comparing the obtained analog value with the output value; and when the obtained analog value is greater than or equal to the output value, confirming that the parameter of the currentlink is used. Through the scheme of the invention, the channel parameter variable on the PCB is determined according to the influence of the channel parameter variable of the transmission link on thePCB.
Description
technical field [0001] The invention relates to the field of servers, in particular to a method and a device for determining parameters on a printed circuit board (PCB). Background technique [0002] In the current design of high-speed server motherboards, with the increase in the transmission rate of high-speed signals, the quality of signal transmission in complex long-distance channels will be affected. Therefore, in order to reduce the risk of high-speed signal design, in the early stage of project development and design, an analog entire chain will be introduced. The risk estimation and optimization work is carried out by using the method of signal simulation quality of the road, so as to control the risk of the design link. For signal simulation, usually design link and Intel PDG (Platform Design guide, Platform Design Guide) corresponding link for CQC (Channel Quality Comparison, channel quality comparison) simulation comparison, CQC simulation comparison method is ea...
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IPC IPC(8): G06F17/50
Inventor 武宁
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD