Posts by Andy aka
if we don't apply a sinusoidal signal at the input s may become a complex number $$$$ All real-world signals exist only on the $j\omega$ axis. Consider that a complicated signal can be broke...
I think you can make a pretty good case for the spike being caused by the addition of the 100n and 10n capacitors: - I assume that the solder blobs between capacitors introduced a series indu...
Is the Thevenin's Theorem being applied incorrectly for the circuit ? It's being applied inaccurately. The final Thevenin voltage should be 2.782 volts (rather than your calculated value of 2....
That fourth connection is the bulk/body/substrate connection: - Image from here. On a normal 3 terminal MOSFET the "body" is connected to the source. On your device, the 3 n-channel MOSFETs shar...
"React" implies a response to an "event". For an inductor, the "event" is a change in current, $\frac{di}{dt}$ For a capacitor, the "event" is a change in voltage, $\frac{dv}{dt}$ $$$$ So, ...
Why are some PCB design software programs considered to be 'hobbyist' programs? Elitism and, folk with money to burn. I've used Altium, PADs, OrCad, Eagle and my current personal favourite is...
Embedding pictures is a pain in the ass. First you have to find the picture and save it locally then you have to drop it onto a special box before it can be processed. On SE, you just drag it to wh...
Very short answer - get rid of downvotes on answers; just don't allow them In fact, wouldn't it be a better policy to award upvotes to people who point out errors. That would encourage folk to wan...
It's still happening: - Can someone actually do anything about this? This has happened on stack exchange before but this is ridiculously more far fetched than what has ever happened there. Do y...
How is it possible to generate 500V on a trafo secondary given the 1:1 ratio? In a DCM flyback transformer circuit, the secondary winding is being used as a pure inductor. So, once the primary...
Why am I getting these downvotes? It started last week (or the week before) and now it seems like it's getting contagious: - Seems like this site has some of the same outrageous inclinations as ...
Currently there are $\boxed{\color{red}{\text{three}}}$ downvotes so maybe someone can explain why this has happened. Anyway, on to my downvoted answer: - You have "mentioned" the threat (the ESD ...
Please let me know if there is anything wrong with this logic. So far so good. The voltage clamp (3 zener diodes for European IS category iA and two for category iB) is the limiter on voltage ...
Try this out for size: - Hope it's clear. Maybe a little simulation of 10 km 600 Ω line might help paint a better picture: - The voltage (V1) that feeds the t-line via the 100 Ω lamp is a 1 v...
I want to convert the power from the wall from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer I got._ Try this using a 1:1, 208 volts isolation tr...
You might get lucky and be able to measure the input resistance using this method. It should work because the black socket (common) is shared by all measurements.
Inductance is defined by the shape of the coil, the area of the coil, the number of turns in the coil, the distance between turns, the ferromagnetic permeability of material within (and surrounding...
Which will be the total inductance of this circuit? Quite simply, if both the individual 1 henry inductors are perfectly magnetically coupled then, the net inductance will be 4 henries. If bot...
in my schematic we must add R1 correct? Yes that works except: - One last question if we deliver voltage to a house are there varactors which can handle 120V AC No, they don't exist.
There are plenty of ways a single diode and a couple of resistors can perform multiplication (RF mixing). Consider this circuit that takes two inputs (a 1 MHz sinusoidal carrier wave and a 10 kHz t...
How can we extract a DC signal from a mixed signal? You use a low-pass filter with a cut-off frequency that is significantly lower than your lowest AC signal frequency. If you need better filt...
Which graph on the picture above better represents real-world use-case? They both represent real-world use cases. The impedance graph informs you how much ESL (effective series inductance) the...
Since we are trying to keep the impedance matched to 50 ohms, what is the best strategy to approach this circuit? A low pass $\pi$ network seems a good route to go. Basically your $\pi$ networ...
In circuit analysis why always the power has upper hand over energy? One obvious reason: - If we calculate how much power a resistor dissipates we can calculate how hot it will get (knowing i...
To add to Olin's excellent answer, if you were probing on a digital IO line in order to view a fast changing signal, without the local ground clip (or spring) grounded close to where you make the m...
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