The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> Circuit Simulators >> Transient Methods in cadence
https://designers-guide.org/forum/YaBB.pl?num=1328681857

Message started by afridi on Feb 7^th, 2012, 10:17pm

Title: Transient Methods in cadence
Post by afridi on Feb 7^th, 2012, 10:17pm

Hi,

What is the difference in Transient solver methods such as "gear2only" "trap" etc. Can anyone share a good explanation and comparison of their characteristics for required type of analysis.

Regards

Title: Re: Transient Methods in cadence
Post by boe on Feb 8^th, 2012, 4:01am

Afridi,
These are algorithms to solve O(rdinary) D(ifferential) E(quations) numerically.
You can find explanations in any textbook on numerical methods for ODEs. Look for second-order Gear algorithm (gear2), trapezoid (or Crank–Nicolson) method (trap), or backward Euler (euler). The other options are combinations of these options.
- B O E

Title: Re: Transient Methods in cadence
Post by afridi on Feb 8^th, 2012, 5:07am

Okay thank you. I will definitely look into that.

But isnt there any non-mathematical explanation and comparision of such algorithm in terms of what kind of numerical technique is it, its advantages and its disadvantages in the Cadence documentation or any other open source documentation. For example, SILVACO TCAD has a whole chapter in its help file on the numerical techniques it is using and what are the pros and cons of each solving technique. etc etc

Title: Re: Transient Methods in cadence
Post by Frank Wiedmann on Feb 8^th, 2012, 5:52am

Take a look at Ken's book "The Designer's Guide to SPICE and Spectre" (see http://www.designers-guide.org/Books/#Kundert-1995).