SIwave2 S-parameter Extraction
This post introduces how to extract the s-parameter of a pair of PCB traces using SIwave 2020R2.
草原 契诃夫
Spoiler alert.
Cadence OrCAD 平坦原理图使用port还是off-page？
使用OrCAD 16.6。（17.2简单测试好像也有这个问题，不知道更新的版本是否不同） 结论 平坦原理图中，个人推荐使用off-page connector. 使用Port的问题 主要是DRC的问题。port名称不匹配造成单端网络时，在平坦原理图中DRC不会报错。 比如，下图两页中的data1信号，一个接了data1 port，另一个接了 data3 port，但是DRC不会报错。感觉这容易导致设计错误。 删除port的情况 删除port，如果两个net alias名称相同，DRC会有警告。 Checking For Single Node Nets WARNING(ORCAP-1600): Net has fewer than two connections data1 SCHEMATIC1, PAGE1 (3.50, 1.60) WARNING(ORCAP-1600): Net has fewer than two connections data1 SCHEMATIC1, PAGE2 (3.80, 2.40) Checking For Unconnected Bus Nets WARNING(ORCAP-1611): Two nets in same schematic have the same name, but there is no off-page connector data1 SCHEMATIC1, PAGE2 (3.80, 2.40) 使用off-page的情况 使用off-page connector，但是名称不匹配时，DRC也会有警告。...
SIwave1 New Project and DC IR analysis
Using Ansys SIwave 2020R2. This post introduces a basic IR-drop analysis on the power planes using SIwave 2020R2. Analyze the voltage drop of one power rail, from source to chip. All the RLC components are deactivated except for those connected in series to the power rails. SIwave Documentation: Computing DC IR Simulations New Project Import ODB++ default setting for nets. The Workflow Wizard Open the Workflow Wizard from this button on the upper-left....
Microblaze3 I2C EEPROM Polled
AXI_IIC IP and EEPROM operation.