Designer’s Guide Community

Pages: 1

how to stop a transition filter in verilogA? (Read 2227 times)

liuqian0428 New Member Offline Posts: 1	how to stop a transition filter in verilogA? 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!
Back to top	IP Logged

jbdavid

Community Fellow

Offline

Posts: 378
Silicon Valley

Re: how to stop a transition filter in verilogA?
Reply #1 - 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..

jbdavid
Mixed Signal Design Verification

IP Logged

Pages: 1

‹ Previous topic | Next topic ›