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Design >> RF Design >> Quality factor of resonant circuit and Quality factor of inductor both are same?
https://designers-guide.org/forum/YaBB.pl?num=1284542165

Message started by suryakumari on Sep 15^th, 2010, 2:16am

Title: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by suryakumari on 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

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by Manish Dudhat on 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

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by anil reddy on 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...

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by tkhan on Sep 15^th, 2010, 6:23am

Read http://rfic.eecs.berkeley.edu/142/pdf/lect5.pdf

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by Frank Wiedmann on 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=2000.

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by rfmems on 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.

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by pancho_hideboo on Sep 15^th, 2010, 10:19am

See http://www.designers-guide.org/Forum/YaBB.pl?num=1278414763/14#14

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by surya on Sep 29^th, 2010, 3:06am

Thank U :)

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by raja.cedt on 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.

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by surya on Oct 1^st, 2010, 3:32am

K i got it...
Thank u

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by Ken Kundert on 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

Title: Re: Quality factor of resonant circuit and Quality factor of inductor both are same?
Post by saam on 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 :)