Wednesday, March 8, 2017

PCB Trace Voltage Drop Calculation

Get trace resistance from Saturn PCB Calculator - Conductor Properties





















Calculate Trace Voltage Drop using Ohms Law























That's it !

Thursday, March 2, 2017

Efficiently Using BGA Signal Routing - NexLogic Technologies

BGAs - NexLogic Technologies:






















'via Blog this'

Wednesday, February 22, 2017

Transceiver Link Design Guidelines for High-Gbps Data Rate Transmission - Altera

Altera AppNote AN672 was recently updated. This app note is perfect for anyone who is on the high speed learning curve.

'via Blog this'

Sunday, February 19, 2017

How to 'Exclude' parts in HyperLynx | Mentor Graphics Communities

How to 'Exclude' parts in HyperLynx | Mentor Graphics Communities:

An unanswered question.


There are resistors in this design that can be fitted or not fitted to determine the signal paths. 


To accurately simulate this design Hyperlynx would need to analyze the signal path and stub lengths based on which parts are installed and not fitted.


click on image to view



















The question is how would you remove the stubs and paths from within Hyperlynx to simulate the design as though the parts were not fitted (removing the stub paths).


Comments welcome and appreciated !

Monday, February 13, 2017

Via fence - Thumb Rules

Thumb rules:

Stitching Vias for RF should be spaced at lamba/20, where lamba equals the wavelength of the highest frequency of interest.

For striplines, "a rule of thumb is to place the fences at least four times the trace to ground plane distance away from the line being guarded"


Source: Via fence - Wikipedia: