And, as you worked out, the inductor required would then be 660000 Henries.Without load resistor I want to design a RLC filter. As I told you my load resistor is 30G ohm.
And, as you worked out, the inductor required would then be 660000 Henries.Without load resistor I want to design a RLC filter. As I told you my load resistor is 30G ohm.
No it isn’t. This is why you cannot design the details of a circuit without knowing the big picture. There are engineers here with hundreds of years of combined experience telling you that your approach is backwards. Why won’t you listen?told you my load resistor is 30G ohm.
that’s how old this thread is making me feel.. . . .There are engineers here with hundreds of years of combined experience
hi pp,
This is what LTS shows for your filter.
E
BTW: When you say G, thats short for Giga, please confirm.?
View attachment 247511
So you want 42dB/octave roll-off? That’s not a 2nd order filter. That’s a 7th order filter. You will need four inductors and three capacitors. (And for a 7th order filter, being matched to the load impedance is critically important)I want to have graph as shown in red, I'm trying to achieve this.
He has no idea what he wants, or even why he wants it. It is a fool’s errand to try to help him.So you want 42dB/octave roll-off? That’s
No, I don't want to go higher order than the 2nd order. I want to design the filter with 2nd order only. Not exactly -40db, but I want to attenuate the signal as fast as possible.So you want 42dB/octave roll-off? That’s not a 2nd order filter. That’s a 7th order filter. You will need four inductors and three capacitors. (And for a 7th order filter, being matched to the load impedance is critically important)
Would you like me to post the next page from Zverev, with 5th, 6th and 7th order filter tables?
Hello again,I would like to design the filter that will cut of the frequency above 5kHz. So, I have designed RLC circuit. Please can you have a look and tell me that the circuit design is correct or not?.
View attachment 247498
In order to achieve the critical damping (where equilibrium position occurs), which value is to be chosen ζ = 0.7071 or ζ = 1?. Which one is to achieve the critical damping?. Because the websites describes in different ways, some of them considered 0.7071 and other are 1.High damping factor = low Q
Low damping factor = high Q
The higher the Q the more it oscillates.
ζ = 1 or Q=0.5 is critical damping.In order to achieve the critical damping (where equilibrium position occurs), which value is to be chosen ζ = 0.7071 or ζ = 1?. Which one is to achieve the critical damping?. Because the websites describes in different ways, some of them considered 0.7071 and other are 1.
Just to expand on what Ian said...In order to achieve the critical damping (where equilibrium position occurs), which value is to be chosen ζ = 0.7071 or ζ = 1?. Which one is to achieve the critical damping?. Because the websites describes in different ways, some of them considered 0.7071 and other are 1.
ζ = 0.707 0r Q = 0.7 is not a critical damping?.ζ = 1 or Q=0.5 is critical damping.
No. That’s a Butterworth.ζ = 0.707 0r Q = 0.7 is not a critical damping?.
No. That’s a first order filter. You can tell because the slope is 6dB/octave and the phase shift is 90°.Hello Everyone,
I have design the second order RLC low pass filter with the targeting the cut-off frequency is around 100Khz. I need confirm with you guys that the one which I have designed is correct or not?. See the below image.
View attachment 277309
by Jake Hertz
by Aaron Carman
by Jeff Child
by Jeff Child