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  #1  
Old 10-02-2011, 10:47 PM
testing12 testing12 is offline
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Default Resonance Problem

A parallel resonant circuit with quality factor 120 has a resonant frequency of 6
10 6 rad/s. Calculate the bandwidth and half-power frequencies.

I got Bandwidth = 50 000 rad/s
w1 = 5.975e6 rad/s
w2 = 6.025e6 rad/s

Can someone please confirm? It seems for this question the back of my txt provides answers in Farads in Henrys. Its clear there was a typo.

Thanks for your help.

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  #2  
Old 10-06-2011, 11:09 PM
steveb steveb is offline
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Default

Quote:
Originally Posted by testing12 View Post
A parallel resonant circuit with quality factor 120 has a resonant frequency of 6
10 6 rad/s. Calculate the bandwidth and half-power frequencies.

I got Bandwidth = 50 000 rad/s
w1 = 5.975e6 rad/s
w2 = 6.025e6 rad/s

Can someone please confirm? It seems for this question the back of my txt provides answers in Farads in Henrys. Its clear there was a typo.

Thanks for your help.

That looks correct to high accuracy, although the upper and lower frequencies are not exactly half the bandwidth away from the center frequency in general. However, for high Q systems, the upper and lower frequencies are symmetric about the resonance to very high accuracy.
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testing12 (12-29-2011)
  #3  
Old 12-29-2011, 10:31 PM
testing12 testing12 is offline
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Late, but I forgot to thank you.
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steveb (12-29-2011)
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