[SI-LIST] Re: Op-amp gain measurement
- From: Ray Anderson <raymonda@xxxxxxxxxxxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 4 Dec 2002 15:53:02 -0800 (PST)
Define your equation as a parameter in a .print statement in the
spice deck. You can then select the result in Awaves as a parameter.
Example:
.print db =par('db(v(2)/v(in1))')
or in your case:
.print dB = par('db(v(O1)-v(O2))/(v(I1)-v(I2))')
or something like that......
-Ray Anderson
Sun Microsystems Inc.
>
>
>Hi,
> I want to view the open-loop gain of the two-stage
>op-amp I designed in hspice.
> In Pspice-Orcad i used to give the expression
> db((V(O1)-V(O2))/(V(I1)-V(I2))) and i can see open
>loop gain of op-amp in decibels.
> how do i do the same in Hspice, since hspice doesnt
>allow me to give such expression in the Results
>Browser??
>
>Thanks in advance,
>Parthasarathy
>
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