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Simulators >> AMS Simulators >> how to stop a transition filter in verilogA?
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Message started by liuqian0428 on May 13^th, 2008, 1:10am

Title: how to stop a transition filter in verilogA?
Post by liuqian0428 on May 13^th, 2008, 1:10am

Hi, every one.

I want to genrate some simulation stimulus in VerilogA. one of the pin is inout, so this pin must floating when it is a output.
I use the transition filter to pass the value to the pin, but I don't know how to stop the transition filter when I need?

Thank you so much!

Title: Re: how to stop a transition filter in verilogA?
Post by jbdavid on Oct 9^th, 2008, 6:32pm

In analog changing the network connections on the fly can lead to simulation convergence issues..
you might rather stick a resistor in series with the driver and change the resistors value depending on the drive state..

bmslib (see my other recent answer today) contains and example switch sw_no which is proabably the best way to define such a variable resistor.. since the ratio of ron to roff is really high..