Dec 22, 2005 #1 B bageduke Advanced Member level 4 Joined Oct 19, 2005 Messages 119 Helped 11 Reputation 22 Reaction score 2 Trophy points 1,298 Activity points 2,090 how to get input impedance I tried to get Rin vs. frequency. It seems that the capacitance at Vin node somehow shunts Rin and form a zero. But when I used small signal analysis, I couldn't find this zero but a zero by the capacitance at Vout node. Anyone can tell me what I think wrong?
how to get input impedance I tried to get Rin vs. frequency. It seems that the capacitance at Vin node somehow shunts Rin and form a zero. But when I used small signal analysis, I couldn't find this zero but a zero by the capacitance at Vout node. Anyone can tell me what I think wrong?
Dec 22, 2005 #2 S sunking Advanced Member level 3 Joined May 25, 2004 Messages 873 Helped 70 Reputation 140 Reaction score 23 Trophy points 1,298 Activity points 6,283 it has a zero. there is a cap between Vbias and Vin, say Cgs, which shunt with Rin
Dec 23, 2005 #3 L LaughingMAN Newbie level 6 Joined May 22, 2004 Messages 11 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location Malaysia Activity points 101 Hi, Are you going to use hand calculation to find the input impedance or simulators such as Hspice to plot the impedance?
Hi, Are you going to use hand calculation to find the input impedance or simulators such as Hspice to plot the impedance?