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Plot 3db Bandwidth

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7 Threads found on edaboard.com: Plot 3db Bandwidth
hi I have to obtain the axial ratio bandwidth .But when I tried to plot this graph, there is no point below 3db and also shows some ripples at frequencies. What has to be done to improve the axial ratio plot. pls help me thank uuu
I am not sure to check -3db BW by considering Loop gain or Closed loop gain plot. The filter circuit is realized using feedback. Hence, I see no reason to measure/calculate/simulate the 3db BW not in this closed-loop configuration.
If we want to determine the bandwidth at a given frequency f, we should determine the 3db fractional bandwidth. according to the Shannon formula, we can calculate the bandwidth to be: bandwidth at f =3db_bandwidth*f on the other hand when plot the (...)
For a nonlinear Class E Power Amplifier, if I want to check its 3db bandwidth, do I just do a parametric sweep analysis of frequency of the input signal and see the frequency vs power gain plot?Use PSS Analysis with sweeping fundamental frequency which is a frequency of driving signal.
Consider a single real zero in the left half of the s-plane. This will have the form (s/z+1) ==> (jw/z+1) in time constant form. At low frequencies (w near 0), the magnitude of this term is approximately 1 ==> 0 db. At high frequencies (w/z >> 1), the magnitude of this term is approximately |w/z| ==> 20*log_10(|w/z|) db. At frequency w=w1, t
If you have the specs of a comercial opamp look at the plot gain versus frequency and check the gain 3db below the DC gain. Now, if you're simulating your opamp just perform an AC analysis and plot gain versus frequency and measure the gain in the same way.
vary the input frequency and calculate output voltage and plot graph between frequency and voltage ratio in db and find 3db bandwidth