Designer’s Guide Community

‹ Previous topic | Next topic ›

Pages: 1

error "quantity exceeds blowup limit 1G (e9)" (Read 6369 times)

babuchacko

New Member

Offline

Posts: 4

error "quantity exceeds blowup limit 1G (e9)"
Aug 15^th, 2007, 12:11pm

I am creating a transistor model, in vhdl ams which consist of several simultaneous equations. At one point in the model i need to determin a quantity which takes a value of the order e16 when i calculated manually....
the simulator gives an error which says "the quantity exceeds blow up limit e9(1G)".... though it make sence for the error, i need to include that quantity which attains a value of the order e14... how can i overcome this prb.. can anyone help me......

thankyou
Babu chacko

IP Logged

adauto6 New Member Offline Posts: 7	Re: error "quantity exceeds blowup limit 1G (e9)" Reply #1 - Aug 15^th, 2007, 1:41pm Maybe you have to set other tolerance for that quantity ...
Back to top	IP Logged

babuchacko New Member Offline Posts: 4	Re: error "quantity exceeds blowup limit 1G (e9)" Reply #2 - Aug 15^th, 2007, 3:21pm thank dude...but I have never tried changing the tolerence limit of a quantity...Do anyone know how to do that??
Back to top	IP Logged

ACWWong Community Fellow Offline Posts: 539 Oxford, UK	Re: error "quantity exceeds blowup limit 1G (e9)" Reply #3 - Aug 16^th, 2007, 3:48am in verilogams you can use the nature declaration. an example is: nature Frequency abstol = 1K; access = FF; units = "Hz"; blowup = 1T; endnature perhaps you can lookup in your vhdlams manual something similar.
Back to top	IP Logged

babuchacko New Member Offline Posts: 4	Re: error "quantity exceeds blowup limit 1G (e9)" Reply #4 - Aug 16^th, 2007, 6:33am thanks for the suggestion.... will try that one....
Back to top	IP Logged

Geoffrey_Coram

Senior Fellow

Offline

Posts: 1998
Massachusetts, USA

Re: error "quantity exceeds blowup limit 1G (e9)"
Reply #5 - Aug 17^th, 2007, 4:45am

Strange -- are you outputting that quantity? Verilog-AMS simulators don't generally care what you do with the internal variables and only complain when terminal voltages and currents exceed blow-up limits.

You could also re-scale the quantity, ie, factor out 1e10 in the computation and put it back when you use the quantity.

If at first you do succeed, STOP, raise your standards, and stop wasting your time.

IP Logged

Pages: 1

‹ Previous topic | Next topic ›