Dec 7, 2004 #1 S saryee Member level 2 Joined Sep 4, 2003 Messages 53 Helped 0 Reputation 0 Reaction score 1 Trophy points 1,286 Activity points 469 Hi, there, What's the relationship between QL and Qu? Is this correct? Qu = QL / (1 - 10 ^ (-S21/20)). Regards, saryee
Hi, there, What's the relationship between QL and Qu? Is this correct? Qu = QL / (1 - 10 ^ (-S21/20)). Regards, saryee
Dec 8, 2004 #2 A aryajur Advanced Member level 3 Joined Oct 23, 2004 Messages 793 Helped 124 Reputation 248 Reaction score 37 Trophy points 1,308 Location San Jose, USA Activity points 7,788 What are QL and Qu????
Dec 8, 2004 #3 B brmadhukar Advanced Member level 3 Joined Jun 21, 2002 Messages 839 Helped 42 Reputation 84 Reaction score 11 Trophy points 1,298 Location India Activity points 6,783 Hi, What is the circuit you are assuming? Or is it circuit independent? B R M
Dec 9, 2004 #4 E-design Advanced Member level 5 Joined Jun 1, 2002 Messages 2,014 Helped 507 Reputation 1,016 Reaction score 408 Trophy points 1,363 Activity points 14,193 In general: Qu = 2ΠWp/Wd Where Wp :- Peak energy stored Wd :- Energy disipated Series circuit: Qu = X/Rs For the inductor Qu = ωL/Rs For the capacitor Qu = 1/ωCRs Parallel circuit: Qu = Rp/X For the inductor Qu = Rp/ωL For the capacitor Qu = RpωC QL is only defined for a resonator QL = Fr/BW from response In terms of reactance and resistance, QL = X/Rload In series circuit QL will be high with large L and small C In parallel circuit QL will be higher with small L and large C
In general: Qu = 2ΠWp/Wd Where Wp :- Peak energy stored Wd :- Energy disipated Series circuit: Qu = X/Rs For the inductor Qu = ωL/Rs For the capacitor Qu = 1/ωCRs Parallel circuit: Qu = Rp/X For the inductor Qu = Rp/ωL For the capacitor Qu = RpωC QL is only defined for a resonator QL = Fr/BW from response In terms of reactance and resistance, QL = X/Rload In series circuit QL will be high with large L and small C In parallel circuit QL will be higher with small L and large C