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https://designers-guide.org/forum/YaBB.pl Design >> RF Design >> quality factor of inductor https://designers-guide.org/forum/YaBB.pl?num=1225122695 Message started by Julian18 on Oct 27th, 2008, 8:51am |
Title: quality factor of inductor Post by Julian18 on Oct 27th, 2008, 8:51am Hi, after reading a lot of papers, I am totally confused by the definition of quality factor of inductor. That is , should we take the electric energy that is inevitably stored in a real inductor into the account? if so should that form of energy be added to or subtracted from the dominant magnetic energy stored in the inductor. If the former is the correct definition, we should get the same definition of Q of an inductor as that of a resonator, If the latter is correct, we get the commonly used formula Q = -Im(y11)/Re(y11). Thanks. Julian |
Title: Re: quality factor of inductor Post by Frank Wiedmann on Oct 27th, 2008, 10:00am You can find a good overview over different definitions for the quality factor of inductors and their usefulness for circuit design in http://www.simics.tec.ufl.edu/papers/00705364.pdf. |
Title: Re: quality factor of inductor Post by raja.cedt on Nov 12th, 2008, 9:04pm hi , i have one doubt regarding Q factor of a circuit.generally i heard Q is defined for 2nd order system only,is this true?i saw in one razaavi paper,in that he used to find Q factor for any circuit by using the standard definition Q=ω*.5*(dΦ/dw)(i hope u understood the formula),in the above expression ω means resonance frequency or corner frequency.Instead he used direct ω as variable frequency.the following is the paper http://www.ee.ucla.edu/~brweb/papers/Journals/BRSept08.pdf just refer appendix-1 Thanks for your time. Regards, |
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