Computing device and crosstalk information detection method

• US 8,547,819 B2
• Filed: 12/07/2010
• Issued: 10/01/2013
• Est. Priority Date: 07/29/2010
• Status: Expired due to Fees

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: Lai, Ying-Tso, Luo, Shi-Piao, Lee, Cheng-Hsien
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): NGO, NGUYEN HOANG
• Application Number:
  US12/961,906
• Publication Number:
  US 20120026902A1
• Time in Patent Office: 1,029 Days
• Field of Search: 370/201, 370/229, 370/241, 370/248, 370/252, 379/1.03, 379/1.04, 379/24, 379/414, 379/416, 379/417
• US Class Current: 370/201
• CPC Class Codes: G06F 2119/10 Noise analysis or noise optimisation
• CPC Class Codes: G06F 30/398 Design verification or optimisation, e.g. using design rule check [DRC], layout versus schematics [LVS] or finite element methods [FEM] optical proximity correction [OPC] design processes G03F1/36

Abstract

A computing device and a method reads a circuit board layout file from a storage device, and selects a first signal transmission line from circuit board layout file as a target line. The computing device and method computes a distance between the target line and the aggressor line corresponding to each unit sample length. If the distance is more than or equal to a height of a sample region, the computing device and method defines the height of the sample region as a crosstalk space between the target line and the aggressor line corresponding to a unit sample length. Otherwise, if the distance is less than the height of the sample region, the computing device and method defines the distance as the crosstalk space between the target line and the aggressor line corresponding to the unit sample length.

Claims

1. A computer-based crosstalk information detection method of a circuit board, the method comprising:

reading a circuit board layout file from a storage device of a computing device, wherein the circuit board layout file comprises arrangement information of signal transmission lines of a circuit board;

selecting a first signal transmission line from the circuit board layout file as a target line;

receiving detection parameters set by a user, wherein the detection parameters comprise a height of a sample region for detecting aggressor lines of the target line, and a unit sample length along orientation of the target line;

determining a second signal transmission line as an aggressor line of the target line based on the sample region;

computing a distance between the target line and the aggressor line corresponding to each unit sample length; and

defining the height of the sample region as a crosstalk space between the target line and the aggressor line corresponding to a unit sample length, if the distance is more than or equal to the height of the sample region, or defining the distance as the crosstalk space between the target line and the aggressor line corresponding to the unit sample length, if the distance is less than the height of the sample region.

2. The method as claimed in claim 1, further comprising:

outputting a detection result list on a display of the computing device, wherein the detection result list comprises all distances between the target line and the aggressor line and an extension length of the target line corresponding to the same distance value.

3. The method as claimed in claim 1, wherein the arrangement information of signal transmission lines comprises the number of signal transmission lines arranged on the circuit board, length of each signal transmission, and orientation of each signal transmission line.

4. The method as claimed in claim 1, wherein the sample region is an area determined by the target line and a reference line parallel to the target line, and the height of the sample region is a distance between the target line and the reference line.

5. The method as claimed in claim 1, wherein the distance between the target line and the aggressor line corresponding to each unit sample length is a largest distance value between the aggressor line and a longest extension length of the target line corresponding to the unit sample length.

6. The method as claimed in claim 2, wherein the unit sample lengths corresponding to the same distance value are totalized as the extension length of the target line corresponding to the same distance value.

7. The method as claimed in claim 1, wherein the storage device is selected from the group consisting of a smart media card, a secure digital card, and a compact flash card.

8. A computing device, comprising:

a storage device;

at least one processor; and

a detection unit comprising computerized code in the form of one or more programs, which are stored in the storage device and executable by the at least one processor, the one or more programs comprising;

a file read module operable to read a circuit board layout file from the storage device, wherein the circuit board layout file comprises arrangement information of signal transmission lines of a circuit board;

a line selection module operable to select a first signal transmission line from the circuit board layout file as a target line;

a parameter setting module operable to receive detection parameters set by a user, wherein the detection parameters comprise a height of a sample region for detecting aggressor lines of the target line, and a unit sample length along orientation of the target line;

an information detection module operable to determine a second signal transmission line as an aggressor line based on the sample region, and compute a distance between the target line and the aggressor line corresponding to each unit sample length; and

a result optimization module operable to take the height of the sample region as a crosstalk space between the target line and the aggressor line corresponding to a unit sample length, if the distance is more than or equal to the height of the sample region, and operable to take the distance as the crosstalk space between the target line and the aggressor line corresponding to the unit sample length, if the distance is less than the height of the sample region.

9. The computing device as claimed in claim 8, wherein the result optimization module is further operable to output a detection result list on a display of the computing device, wherein the detection result list comprises all distances between the target line and the aggressor line and an extension length of the target line corresponding to the same distance value.

10. The computing device as claimed in claim 8, wherein the arrangement information of the signal transmission lines comprises the number of signal transmission lines arranged on the circuit board, length of each signal transmission, and orientation of each signal transmission line.

11. The computing device as claimed in claim 8, wherein the sample region is an area determined by the target line and a reference line parallel to the target line, and the height of the sample region is a distance between the target line and the reference line.

12. The computing device as claimed in claim 8, wherein the distance between the target line and the aggressor line corresponding to each unit sample length is a largest distance value between the aggressor line and a longest extension length of the target line corresponding to the unit sample length.

13. The computing device as claimed in claim 9, wherein the unit sample lengths corresponding to the same distance value are totalized as the extension length of the target line corresponding to the same distance value.

14. The computing device as claimed in claim 8, wherein the storage device is selected from the group consisting of a smart media card, a secure digital card, and a compact flash card.

15. A non-transitory computer readable medium storing a set of instructions, the set of instructions capable of being executed by a processor of a computing device to perform a crosstalk information detection method of a circuit board, the method comprising:

reading a circuit board layout file from the medium, wherein the circuit board layout file comprises arrangement information of signal transmission lines of a circuit board;

selecting a first signal transmission line from the circuit board layout file as a target line;

receiving detection parameters set by a user, wherein the detection parameters comprise a height of a sample region for detecting aggressor lines of the target line, and a unit sample length along orientation of the target line;

determining a second signal transmission line as an aggressor line based on the sample region;

computing a distance between the target line and the aggressor line corresponding to each unit sample length; and

defining the height of the sample region as a crosstalk space between the target line and the aggressor line corresponding to a unit sample length, if the distance is more than or equal to the height of the sample region, or defining the distance as the crosstalk space between the target line and the aggressor line corresponding to the unit sample length, if the distance is less than the height of the sample region.

16. The medium as claimed in claim 15, wherein the method further comprises:

outputting a detection result list on a display of the computing device, wherein the detection result list comprises all distances between the target line and the aggressor line and an extension length of the target line corresponding to the same distance value.

17. The medium as claimed in claim 15, wherein the arrangement information of the signal transmission lines comprises the number of signal transmission lines arranged on the circuit board, length of each signal transmission, and orientation of each signal transmission line.

18. The medium as claimed in claim 15, wherein the sample region is an area determined by the target line and a reference line parallel to the target line, and the height of the sample region is a distance between the target line and the reference line.

19. The medium as claimed in claim 15, wherein the distance between the target line and the aggressor line corresponding to each unit sample length is a largest distance value between the aggressor line and a longest extension length of the target line corresponding to the unit sample length.

20. The medium as claimed in claim 16, wherein the unit sample lengths corresponding to the same distance value are totalized as the extension length of the target line corresponding to the same distance value.