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Author Comment/Response
yehuda
02/03/13 03:18am

you need to add the assumption that fg>0 to Solve

R1=1*10^6;
C1=100*10^-9;

sys=(s*R1*C1)/(1+s*R1*C1);
A=Abs[sys/.{s->2\[Pi] fg*I}];

Solve[A==1/Sqrt[2]&&fg>0,fg]

returns
{{fg->5/\[Pi]}}

as expected

yehuda

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Subject (listing for 'Cutoff Frequency')
Author Date Posted
Cutoff Frequency devil 02/02/13 2:06pm
Re: Cutoff Frequency yehuda 02/03/13 03:18am
Re: Cutoff Frequency devil 02/04/13 12:17pm
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