Comment by periblepsis on RC Filter Analysis
@KnowledgeSeeker Do you know how to use annihilation to help develop a homogeneous equation to solve (time domain)? It's the bridge to Laplace, which is usually the next chapter in a textbook.
View ArticleComment by periblepsis on 2nd order low pass filter sallen key variation
Sallen & Key provide a catalog of 25 topologies in their MIT paper from 1954, TR-50. All of them are 2nd order transfer functions, though. Have you performed an analysis of this to see if it may be...
View ArticleComment by periblepsis on What is the purpose of this audio transformer in...
Audio transformers, 1:1, are usually 600 Ohm if my memory hasn't failed. They are crafted especially to support a wide audio range and are not exactly the same as some other 1:1 designs. The word...
View ArticleComment by periblepsis on RC Filter Analysis
If you need further help, just ask. I tried to keep it mathematically direct and terse. But there may be parts you need to bridge over the steps I took. For example, try to apply the annihilator I used...
View ArticleComment by periblepsis on Looking for a specific dual voltage mains latching...
@JeffReeves I'd like to see more details. I'd also like to know why, since you appear (I'm guessing from your words) to have access to both 110 and 220, you cannot just use a relay that is designed for...
View ArticleComment by periblepsis on Help understanding resistor filtering out audio output
@S.Stevens A reason Neil may be considering, when asking that question, is that if the sine source at RA-R is low impedance (orders of magnitude lower than the 47k) then all you will see is the sine....
View ArticleComment by periblepsis on Confusion between Power Consumed from device
@Colin Probably not use 0.7A for the breaker. The 90 W is the output spec. The input spec may be (will be) higher power so somewhat more than 0.7 A is likely. And will likely spike for a moment, too,...
View ArticleComment by periblepsis on I want to design a ultra stable low noise current...
Anything with a PN junction in it will have shot noise. That's a given and it adds to other noise sources. You can work to avoid PN junctions to get rid of that source. But this means an entirely...
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Answer by periblepsis for 2nd order low pass filter sallen key variation
central problem: \$c\$ is negativeIt's been over a day without any response from you. You may be busy. So let's go with that. In the meantime, I have allowed this circuit to percolate in my mind in...
View ArticleComment by periblepsis on How to understand current through a capacitor leads...
You are on a merry-go-round. There are other people also sitting on the horses and carriages there as it goes in circles. Suppose there is someone ahead of you about a quarter-way forward. Are they...
View ArticleComment by periblepsis on Why do I observe ringing on gate driver logic input?
@learnvst Doesn't it seem as though the heavy and rapid load change is being seen by a very sensitive input?
View ArticleComment by periblepsis on How to test a femto ammeter?
@rohmeooo I think the author of the question said 10 fA. Not 0.01 fA. And that's the least significant digit so it may be allowed single-sigma noise near that level. In modern photodiode detectors from...
View ArticleComment by periblepsis on Nodal analysis with inverse Laplace transform of a...
Keep in mind that \$\mathscr{L}\left\{x_t^{'}\right\}=sX_s-x_{_0}\$ ( \$\mathscr{L}\left\{x_t^{'}\right\}\ne sX_s\$.) Also, when you write "most efficient and scalable method" several things bother me....
View ArticleComment by periblepsis on Software to get transfer function from a schematic
I do this all the time with SymPy. But I construct the equations by hand. It would be trivial to write software to develop those equations, though. I don't put in any thinking at all. I just create...
View ArticleAnswer by periblepsis for How to find the transfer function of an inverting...
justme tells you exactly why \$R_a\$ doesn't matter. For the circuit, as shown, there is no current in \$R_a\$. So there is no voltage drop across it. So the output shown is the same as the opamp...
View ArticleComment by periblepsis on Feasibility of methods for nodal analysis of a...
@fusedxbrain Generalizing from what you've shown, it seems like there is a lot of symmetry to be used to advantage.
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Answer by periblepsis for Software to get transfer function from a schematic
I'll perform a few of the steps by hand, below. But the process you see here can be easily coded up in Python or any other language you prefer.I'm going to use a circuit that is simple but also...
View ArticleComment by periblepsis on How to prove the sinusoidal response to...
@LeonChang I almost think I know your question. But there is no way I'm going to try and unwind the Gordian knot output of a muddled mind to see if I can share your nightmares. So I'll just ask. Are...
View ArticleComment by periblepsis on What type of microscopes are used in electronics...
Justme is right to ask for clarification. You don't say much at all. If money is no object I might buy a used Strata 400 or Helios G4 from FEI. Nice electron microscope together with Gallium ion beam...
View ArticleComment by periblepsis on Using a low voltage to drive a switch carrying high...
Provide lots more about the load being switched and the 2 V source. You write almost nothing of use so far. Provide as much information as you can. Do not hold back anything. Both what you know and the...
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