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The Designer's Guide Community Forum › Design › RF Design › Quality factor of resonant circuit and Quality factor of inductor both are same?

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Quality factor of resonant circuit and Quality factor of inductor both are same? (Read 312 times)

saam Community Member Offline Posts: 39 india	Quality factor of resonant circuit and Quality factor of inductor both are same? Sep 15^th, 2010, 2:16am What is the difference between quality factor of the resonant circuit and quality factor of the inductor?? both are same?? can anyone tel for both parallel and series resonant circuit Thanku surya
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Manish Dudhat New Member Offline Posts: 2	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #1 - Sep 15^th, 2010, 4:33am Dear friend, i think as per the formula of Q-factor thats for RLC circuit is ,Q = R (sqrt{{C}/{L}),, so it must e different, as in the case of inductor circuit having or not having (only parasitic capacitor). i hope so, that will sound ok... Regards, Manish
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anil reddy

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Posts: 9
India

Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Reply #2 - Sep 15^th, 2010, 6:08am

hello..

the quality factor of the circuit (either series RLC or parallel RLC resonant circuit) indicates how fast the circuit is dissipating the energy through that explicit resistor (R). this is called the Q of the circuit..

on the other hand, �Q of a component comes from when you take parasitic resistance associated with that component...

thank you...

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tkhan Junior Member Offline Posts: 23	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #3 - Sep 15^th, 2010, 6:23am Read http://rfic.eecs.berkeley.edu/142/pdf/lect5.pdf
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Frank Wiedmann Community Fellow Offline Posts: 678 Munich, Germany	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #4 - Sep 15^th, 2010, 7:23am For the different definitions of the quality factor and their meaning, see http://scholar.google.com/scholar?cluster=3790526195310866712&hl=en&as_sdt=2....
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rfmems Senior Member Offline Posts: 121	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #5 - Sep 15^th, 2010, 7:30am In my opinion, Q of RLC is only meaningful at its resonance frequency, Q of an inductor or a cap is meaningful at all frequcies.
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pancho_hideboo Senior Fellow Offline Posts: 1424 Real Homeless	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #6 - Sep 15^th, 2010, 10:19am See http://www.designers-guide.org/Forum/YaBB.pl?num=1278414763/14#14
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saam Community Member Offline Posts: 39 india	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #7 - Sep 29^th, 2010, 3:06am Thank U
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raja.cedt

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Posts: 1516
Germany

Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Reply #8 - Sep 29^th, 2010, 4:46am

hi Surya ,
while talking about parallel resonator most of the time general assumption is inductor is the only non-ideal thing and rest all are ideal (no parasitic), but if you capacitor also non-ideal then you can say
1/Qt=1/QL+1/QC. where Ql is inductor quality factor and Qc is varactor quality factor.

Thanks.

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saam Community Member Offline Posts: 39 india	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #9 - Oct 1^st, 2010, 3:32am K i got it... Thank u
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Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #10 - Oct 1^st, 2010, 9:53pm Saam, People are making an effort on your behalf. Please show them the respect they deserve by using full words rather than IM shorthand. -Ken
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saam Community Member Offline Posts: 39 india	Re: Quality factor of resonant circuit and Quality factor of inductor both are same? Reply #11 - Oct 2^nd, 2010, 4:37am I am really sorry.... Thank you for your advice and i feel very happy for getting not only knowledge also suggestions for the new people like me to this forum. Thank you
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