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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> why my LC-tank start to oscillate from 0V? https://designers-guide.org/forum/YaBB.pl?num=1157450390 Message started by sugar on Sep 5th, 2006, 2:59am |
Title: why my LC-tank start to oscillate from 0V? Post by sugar on Sep 5th, 2006, 2:59am I have an ideal LC-tank with one node connected to ground, and then I set another node's initial condition to 1V, but the transicent waveform starts to oscillate from 0V, why doesn't it start to oscillate from 1V? by the way, I'm using spectre doing those simulation. |
Title: Re: why my LC-tank start to oscillate from 0V? Post by Ken Kundert on Sep 5th, 2006, 6:33am Spectre imposes the initial condition by performing a DC analysis with a 1 V voltage source in series with a 1 Ω resistor attached to the capacitor. But the capacitor is shorted by the inductor, so your attempt to apply an initial condition on the capacitor actually acts to put an initial condition on the inductor. The reverse would be true if you tried to impose an initial condition on the inductor. -Ken |
Title: Re: why my LC-tank start to oscillate from 0V? Post by sugar on Sep 5th, 2006, 9:23pm I see. thank you, Ken. |
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