Gain Crossover Frequency

[Samiran]

Dear All,

How can I obtain the value of Gain-crossover frequency from a SPECTRE
simulation. I was earlier using gainBwProd() for this purpose. But
that would become inaccurate if more than one pole appears before the
crossover frequency [as it simply calculates the (DC gain x dominant
pole) ].

Any help will be appreciated.

BR
Samiran.

 

[Andrew Beckett]

Samiran wrote, on 09/17/10 08:06:

Dear All,

How can I obtain the value of Gain-crossover frequency from a SPECTRE
simulation. I was earlier using gainBwProd() for this purpose. But
that would become inaccurate if more than one pole appears before the
crossover frequency [as it simply calculates the (DC gain x dominant
pole) ].

Any help will be appreciated.

BR
Samiran.

Hi Samiran,

You could use the cross() function to determine the point at which db20() of the
gain crosses 0, say? Or the mag() crosses 1?

Regards,

Andrew.