Setting source value as an integration of other value over a fixed amount time?

[Potatoze]

Hi, I am now creating a model in Cadence with some "memory effect", and wish to have some help.

I want to set a voltage source value as an integration of another value. I want the integration time to be from a fixed amount of time ago to any transient time now. Can anybody please advise how I can do this? Thanks!

 

[KlausST]

Hi,

what about the obvious thing? --> use an integrator.

There are several ways to do this. Just do an internet search.

****
In detail:
* I don´t know what "memory effect" means here.
* I don´t know what help you need
* I don´t know what "another value" means here
* What is it with timing setup at all?

A voltage source can be anything from millivolts, to kilovolts, AC, DC, picoamperes to kiloamperes, from picoseconds to years, one quadrant to four quadrants.

I´m sure you get better replies if you give us at least some hints (in numbers with units) what you want to achieve.

Klaus

 

[dick_freebird]

You might find it most efficient to break the simulation into
two pieces since simulations always start from "now" (t=0).

The "history" could be one simulation and the history-
based result, a second.

In the break, you could (say) cause a result to be printed,
manipulate that result into an initialization-of-variable
file, and then have your "now to future" segment read
that as part of its setup.


Of course that's a dance that is difficult to get through the
GUI, and you might end up needing Ocean scripting for
Cadence, or SPICE / shell scripting in some combo for
other platforms.

I used to have to do this a lot when I was working on laser
trimmed analog parts. Became -much- more difficult when
Cadence dropped cdsSpice (great yet simple filesystem
access) for Spectre ("Command language? What's a command
language? We don't need no steenkin' command language!
Oh, all right, here's Ocean, you whiney bastards, enjoy the
suck").