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Activity for Olin Lathrop‭

Type On... Excerpt Status Date
Edit Post #283172 Post edited:
over 3 years ago
Edit Post #283172 Post edited:
over 3 years ago
Edit Post #283172 Initial revision over 3 years ago
Answer A: 2 bit subtractor using full subtractor
We don't just give direct answers to homework (or homework-like) questions here, but can help you work thru the problem on your own. You might consider trying to synthesize a subtractor from scratch, just like you would an adder. The fundamental building block of an adder is the half-adder. It t...
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over 3 years ago
Edit Post #283099 Initial revision over 3 years ago
Question What is this metal panel under power lines?
I was hiking around the Berkshires in western Massachusetts yesterday, and came across this metal panel where some power lines were crossing a ridge: Image alt text Image alt text Image alt text The panel is a few meters wide, and appears to have no electrical connection to it. It cost...
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over 3 years ago
Comment Post #282848 Please don't include the disclaimers that you show. It's your personal content, so you can use it here too without it being plagiarism. As for stating that the answer is made up, that just adds noise. Someone with that problem looking for the answer isn't going to care. Everyone can see that the ...
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over 3 years ago
Edit Post #282850 Post edited:
over 3 years ago
Edit Post #282850 Initial revision over 3 years ago
Answer A: Can a paper be a tutorial or textbook-like?
This is a good question. I wasn't originally envisioning introductions to known concepts, but that might work if well written. If so, the Paper should at least be clearly labeled as such. We don't have a lot of Papers, and I wouldn't want to see introductory material drowning out new concepts. I ...
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over 3 years ago
Edit Post #282849 Post edited:
over 3 years ago
Edit Post #282849 Initial revision over 3 years ago
Answer A: What are the guidelines for porting one's answers from ElectricalEngineering.SE, if any?
Sorry I didn't notice this earlier. We definitely don't just want to import questions and answers directly from SE. This has been discussed several times on various Codidact sites. Some of the first few Codidact sites did mass-import from SE, and that didn't go very well. Those sites are doing ...
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over 3 years ago
Edit Post #282575 Post edited:
over 3 years ago
Edit Post #282746 Post edited:
over 3 years ago
Edit Post #282746 Post undeleted over 3 years ago
Edit Post #282746 Post deleted over 3 years ago
Edit Post #282746 Question closed over 3 years ago
Edit Post #282742 Post edited:
over 3 years ago
Edit Post #282745 Initial revision over 3 years ago
Answer A: Input offset voltage/bias current noise contribution in operational amplifiers
While input offset voltage is technically noise in the sense that it is something unwanted added to the signal, it is not included in opamp noise specs as far as I have seen. Think of the "noise" spec as the AC part of the noise, with the offset voltage and current telling you about the DC part of...
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over 3 years ago
Edit Post #282738 Post edited:
over 3 years ago
Edit Post #282738 Post edited:
over 3 years ago
Edit Post #282742 Post edited:
over 3 years ago
Edit Post #282738 Post edited:
over 3 years ago
Edit Post #282738 Post edited:
Fixed image.
over 3 years ago
Edit Post #282742 Initial revision over 3 years ago
Answer A: Electric circuit with antenna
Antennas are not lumped-parameter systems. They may be open circuits or shorts at DC, but this changes as the frequency goes up. They aren't just a bunch of wires anymore at the intended operating frequency. Take a simple dipole as example. It's just two disconnected wires at DC, but that doesn...
(more)
over 3 years ago
Edit Post #282729 Question closed over 3 years ago
Edit Post #282724 Initial revision over 3 years ago
Answer A: Diodes used in mixers
Take a look at the circuit and try to see what function it will perform on the input signals to yield the output signal. For simplicity, let's consider the diode ideal, R1 and R2 the same, and R3 much larger. R1 and R2 will average the two input signals onto the anode of the diode. The diode wil...
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over 3 years ago
Edit Post #282711 Question reopened over 3 years ago
Edit Post #282721 Initial revision over 3 years ago
Answer A: Trouble understanding how to use adjustable LDO regulator
I just happened to re-read this question, and I now think I see better what Microchip was trying to say here: On closer examination, I think this is actually correct but badly worded. I believe it should be interpreted as: Dropout voltage is defined as the input-to-output differential when...
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over 3 years ago
Comment Post #282672 @Kranulis: While we do give some extra slack, ultimately we don't tolerate lazy students or sloppy engineering just because this site is still young. If this site had high traffic, this question (and probably a few others with the same crayon schematics) would have simply been closed and forgotten. ...
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over 3 years ago
Edit Post #282711 Question closed over 3 years ago
Comment Post #282711 This question is too broad in its current form. Show a circuit of what you call a "unbalanced frequency mixer", and we can probably explain how it works. Or, give a proper spec for what this circuit is supposed to do, and we might be able to show how diodes could be used to advantage.
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over 3 years ago
Edit Post #282696 Initial revision over 3 years ago
Answer A: MOSFET differential to single ended converter intuition
To be clear and protect against possible future edits, here is the circuit being discussed: As you say, this is a differential to single ended converter. In this case, the MOSFETs have likely been optimized so that they act as voltage-controlled current sources over most of their range. They...
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over 3 years ago
Edit Post #282672 Post edited:
over 3 years ago
Edit Post #282672 Initial revision over 3 years ago
Answer A: Voltage of tank circuit is invalid
You need to be more careful. First, you should have been able to see for yourself that the first equation isn't written right. I'll assume the whole "-0.5t" is the exponent of e. You were too sloppy to notice, or too lazy to fix it. Either way, it's really rude to the volunteers here. That's w...
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over 3 years ago
Edit Post #282627 Post edited:
over 3 years ago
Edit Post #282627 Initial revision over 3 years ago
Answer A: Capacitor in 2nd stage of opamp
That looks like the internal compenstation capacitor. It creates a single dominant pole over most of the opamp's intended operating range. Opamps with dominant pole compensation can be characterized by a fixed gain bandwidth product from a bit past the dominant pole frequency and higher. This ch...
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over 3 years ago
Edit Post #282585 Question reopened over 3 years ago
Comment Post #282585 Hmm. It's still pretty hard to read. What's that thing in the top middle of the schematic, for example? Also, the equations in your text are unreadable. We have MathJax here for that. I'll reopen it this one time, but in the future this won't be good enough. You wouldn't hand in homework this i...
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over 3 years ago
Comment Post #282585 This question is closed because the diagrams are unreadable. You should have been able to see that for yourself. Each circuit should probably be a separate image, and any text between should be normal text in the question. Text in images doesn't work for indexing and searching. While you're at it...
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over 3 years ago
Edit Post #282585 Question closed over 3 years ago
Edit Post #282575 Post edited:
over 3 years ago