Post by thread:[EE] LTspice transient analysis of rising voltage

Hi all, In LTspice, for transient analysis (NOT frequency domain analysis), how would I create a voltage or current source that linearly rises? It doesn't have to be repetitive. For example, I want to create a voltage source that steadily rises 1V/s, and a current source that pushes an increasing 1A/s to test transient inductor behaviour

On Wed, Jun 20, 2012 at 8:09 AM, V G <spam_OUTx.solarwind.xTakeThisOuTgmail.com> wrote: > Hi all, > > In LTspice, for transient analysis (NOT frequency domain analysis), how > would I create a voltage or current source that linearly rises? It doesn't > have to be repetitive. > > For example, I want to create a voltage source that steadily rises 1V/s, > and a current source that pushes an increasing 1A/s to test transient > inductor behaviour. > Update: please ignore, I figured out another way. Not the ideal way, but it will do. - Using a PWL directive like this: PWL(0 0 10 10

On Wed, Jun 20, 2012 at 1:18 PM, V G <.....x.solarwind.xKILLspam@spam@gmail.com> wrote: > On Wed, Jun 20, 2012 at 8:09 AM, V G <x.solarwind.xKILLspamgmail.com> wrote: > > > Hi all, > > > > In LTspice, for transient analysis (NOT frequency domain analysis), how > > would I create a voltage or current source that linearly rises? It > doesn't > > have to be repetitive. > > > > For example, I want to create a voltage source that steadily rises 1V/s, > > and a current source that pushes an increasing 1A/s to test transient > > inductor behaviour. > > > > > Update: please ignore, I figured out another way. Not the ideal way, but it > will do. - Using a PWL directive like this: PWL(0 0 10 10) > > Use the pulse setting, and do something like ths: Vinitial = 0V Von = 10V Tdelay = 0s Trise = 10s Tfall = 1s Ton = 10s Tperiod = 11s Ncycles = 1 Then just plot from 0 to 10s in the time domain and you should see the source rising by 1V/s