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The Designer's Guide Community Forum › Design Languages › Verilog-AMS › Transition filter starting at t=0?

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Transition filter starting at t=0? (Read 3317 times)

Bob Atwell New Member Offline Posts: 9 Tucson, AZ	Transition filter starting at t=0? Apr 12^th, 2012, 9:55am Is there a way to get a transition filter to start at t=0? Assume I want a voltage to ramp from 0 to 1 in 1 sec. starting at t=0 and ending at t=1. v <+ transition(1, 0, 1) just starts at 1. Using @initial_step and @timer doesn't seem to work either. Am I missing something or is this just not possible?
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Geoffrey_Coram Senior Fellow Offline Posts: 1999 Massachusetts, USA	Re: Transition filter starting at t=0? Reply #1 - Apr 13^th, 2012, 11:49am If you do this: real x; @(initial_step) x = 0; @(timer(1p)) x = 1; V(x) <+ transition(x,0,1); I would think you could get pretty close to what you were looking for; you can make the argument to @timer smaller, though I guess it has to be always > 0.
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Bob Atwell New Member Offline Posts: 9 Tucson, AZ	Re: Transition filter starting at t=0? Reply #2 - Apr 13^th, 2012, 3:18pm Thanks, that was what I came up with too. I don't like it much but I don't see any other way around it.
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boulate New Member Offline Posts: 2	Re: Transition filter starting at t=0? Reply #3 - Apr 19^th, 2012, 10:36am Why don't you do this? V() <+ $abstime;
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