Dependent Pulse Voltage Source in ADE or spectre

[tcatkins]

I need a pulse voltage source that slowly gets narrower as the simulation progresses. How do I create a dependent pulse source that used a ramping voltage, or some other input, to adjust the width each time the pulse is high? I'd like the period to remain fixed.

Alternately, if I could tell it to go from some width to another width over so many ms, that would work too.

Inputing hundreds of PWL steps isn't practical.

Thanks,

Chris

 

[erikl]

If you can make your pulse width dependent on the current simulation time $time() (or $realtime in Verilog applications), you could perhaps use this parameter in your PWL definition, at least in SPECTRE, s. the corresponding page from the Spectre Circuit Simulator Reference manual: View attachment Spectre_Circuit_Simulator_Reference_V5.0_p894.pdf