Differential transmission line port analysis system and method
A differential transmission line and analysis system technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as S parameter model mismatch, incorrect analysis results, and inability to directly know the relationship between differential transmission lines, etc., to achieve Effects of Avoiding Analytical Errors
Inactive Publication Date: 2011-12-28
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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[0004] Since the measurement and application analysis of S-parameters may be located in different places (for example, the measurement site is in Longhua and the analysis site is in Taipei), the analysis engineer cannot directly know the relationship between the ports of the differential transmission line from the S-parameters, so it is very easy to measure The obtained S-parameter does not match the S-parameter model of the application analysis
For example, the measured S-parameters are based on Figure 4 The port relationship in , while the S-parameter model of application analysis is based on Figure 5 The port relationship in the , resulting in incorrect analysis results
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[0016] refer to figure 1 Shown is an application environment diagram of a preferred embodiment of the differential transmission line port analysis system 31 (hereinafter referred to as the system 31 ) of the present invention. The system 31 is applied to a computing device 30 . The computing device 30 also includes a processor 32 and a memory 33 . Such as figure 1 As shown, the computing device 30 is connected to the measuring instrument 20, and the measuring instrument 20 is used to measure the signal transmitted on the differential transmission line 11 on the circuit board 10 to obtain the original scattering parameters (scattering parameters, referred to as S parameter) file 34, and store the original S parameter file 34 in the memory 33.
[0017] The system 31 is used to analyze the original S parameter file 34, determine the relationship between the ports of the differential transmission line 11 on the circuit board 10, arrange the original S parameter file 34 accord...
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The invention provides a differential transmission line port analysis system. The system includes a series of functional modules. Using these functional modules, the system selects a reference port from the four ports of the differential transmission line, and reads three scattering parameters of the other three ports from the original scattering parameter file. The system screens out the maximum value of the three scattering parameter values corresponding to the lowest frequency signal input to the reference port and the minimum value of the three scattering parameter values corresponding to the highest frequency signal input to the reference port, according to the maximum and minimum values The port connected to the reference port, the port farthest from the reference port, and the closest port relative to the reference port are determined. The invention also provides a differential transmission line port analysis method. With the invention, the scattering parameter file can be analyzed to obtain the relationship of each port of the differential transmission line, and the analysis error caused by applying the scattering parameter file to the scattering parameter model whose port relationship does not match is avoided.
Description
technical field [0001] The invention relates to a circuit simulation system and method, in particular to a differential circuit analysis system and method. Background technique [0002] Compared with ordinary single-ended signal traces, differential signal traces are more and more widely used in high-frequency circuit design because of their strong anti-interference ability. Such as Figure 4 As shown, L1 and L2 represent a pair of differential signal transmission lines, L1 has port 1 and port 3, L2 has port 2 and port 4, port 1 and port 2 together as a pair of differential ports, port 3 and port 4 together as another for differential ports. The so-called differential signal refers to sending two equal and opposite signals at the same time on a pair of differential ports, for example, sending "1010" at port 1 and "0101" at port 2. [0003] The measurement of scattering parameters (scattering parameters, referred to as S parameters) is one of the basic means in the process ...
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Inventor 谢博全白育彰刘建宏
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD