Comment by periblepsis on Circuit analysis with impedances
I believe I'm seeing a re-opened question. You have computed \$Z_1\$ and \$Z_2\$, correctly. Also, the series equivalent total impedance, as well, is correct. And although I might express the current...
View ArticleComment by periblepsis on Triggering NRST with DTR# and RTS#
Are you talking about something like this?
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Answer by periblepsis for Find maximum and minimum between 2 and 3 Numbers
The obvious suggestion will be something like this:In this case, it's a comparator that outputs a 1(true) if \$A\lt B\$. That can be used to gate the appropriate input to an output via a mux.Staging...
View ArticleComment by periblepsis on Voltage divider rule, How to identify the...
There's an unfortunate assumption that your teacher made, but isn't shown explicitly. As such, I'd say that this problem is sufficiently flawed to consider it a fatal flaw. Yet I do see it happen in...
View ArticleComment by periblepsis on 4 bit signed magnitude comparator where -0 = 0
Why don't you explain your thinking in creating this implementation first? It would help a lot towards providing a useful and meaningful answer. Besides, we would be expected to explain ourselves in an...
View ArticleComment by periblepsis on Alternatives to "resistive loads"?
@MichaelHardy Since I haven't been able to acquire a sufficiently clear understanding from your writing -- and that hasn't changed with your added first line of your comment here -- I was just tossing...
View ArticleComment by periblepsis on How to solve BJT circuit with negative V_CE?
I discuss the saturation case in detail here.
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Answer by periblepsis for How to solve BJT circuit with negative V_CE?
Your question brings up the entire Ebers-Moll model and correctly points out that both forward and reverse \$\beta\$ values would be needed.I discuss the saturation case in detail here, with respect to...
View ArticleComment by periblepsis on How to Derive Gain Equations for a Balanced...
I'm particularly taken by the largish values chosen for emitter degeneration. Before considering any reply, I'd like to hear your thinking in setting part values in your circuit. Also, you may want to...
View ArticleComment by periblepsis on How do I calculate the voltage \$U\$ in this...
If there is 1 A in the 50 Ohm resistor, as shown, then there must be another 1 A in the other 50 Ohm resistor. This means that there must be 2 A in the 100 Ohm resistor. Knowing the voltage drop that...
View ArticleComment by periblepsis on Bypass and Couppeling capacitors for Electret...
Do you have any specific goals for the output when the electret is supplied with a specific sound pressure level?
View ArticleAnswer by periblepsis for Thevenin equivalent
For example, perhaps follow this procedure:Set b as your ground reference. This makes b a known value.For those circuit branches where multiple parts in series with each other can just be added...
View ArticleComment by periblepsis on Why not double the radio bandwidth using polarization?
@peterh Watching all of this video may be useful. I positioned that link to be later in the video, right at the point where he demonstrates polarization effects. But watch the whole thing. It's good....
View ArticleComment by periblepsis on Collector Current of BJT
@Luc No. VB \$\ne\$ 12*5/15. You can't ignore the voltage drop across the collector resistor.
View ArticleAnswer by periblepsis for Collector Current of BJT
If you assume, as you say, that \$\beta\to\infty\$ and the base current can be completely ignored then you can just solve for the emitter voltage directly:\$V_{_\text{E}}\$ is...
View ArticleComment by periblepsis on What is wrong with my work about 2nd order circuit?
In your first case, I just chose to run a simulation. The very first problem I encountered is that I don't know which direction is positive for the current in the inductor. So could you clarify that?...
View ArticleComment by periblepsis on Is the physical formula for an inductor always true?
As @hobbs implies, \$\mu=\mu_{_0}\cdot\mu_r\$, where \$\mu_{_0}\$ is the constant for vacuum (no ferromagnetic matter placed within the inductor). While \$\mu_{_0}\$ is a well-known constant that...
View ArticleComment by periblepsis on Vacuum tubes in an audio amplifier
@GrahamNye Sci-Hub dot box lets you enter a DOI and get pretty much anything older than a year or two. Alexandra Elbakyan, a student from Kazakhstan (who moved into Russia) created the site. This paper...
View ArticleComment by periblepsis on How to find the Thevenin equivalent of this circuit?
In some non-US parts of the world, the arrow on the voltage supply points to the positive end of it. Memory serving. But the questioner has the final say about it, I guess.
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Answer by periblepsis for How to find the equivalent resistance of this circuit
Sounds like you already have all you need for your answer. That's great! But I thought I'd add something: always redraw your schematics using these Rules for Re-Drawing Schematics.Drawing from that...
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