Comment by periblepsis on Why does this circuit produce a siren sound?
b. insler, This speaker model will give you a bit of a reason why understanding that circuit isn't as simple as others are suggesting it might be. It's not about understanding capacitors alone. I can't...
View ArticleComment by periblepsis on Impedance module and phase in series impedances
It sounds very doable to me. Depending on what kind of data you are collecting, it should be fairly easy. You can take the output and the input source and readily work out, through division, the...
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Answer by periblepsis for Would This Be a Good Bipolar AND Gate?
The problem I have with the circuit is that it cannot be generally applied as an AND gate. You can make one of them work fine. But it becomes a more serious problem when combining them.For example,...
View ArticleComment by periblepsis on Start counting from 1 and go up to 9 | 7-segment...
@Albii Ah. There is a general process for creating a machine that progresses through a finite set of states. Useful both here and for your closed question there. It's straight forward. Probably what...
View ArticleComment by periblepsis on MC1496P balanced modulator
Looks like saturating the upper cross coupled diff amps to me. I just fired up LTspice and pasted up a circuit real quick to get this, where I used far too large of resistors at pins 6 and 12. So start...
View ArticleComment by periblepsis on Why is buffer output signal reduced to half?
@xcaliber99 50 Ohm output Hartley is often developed by using an appropriate transformer. A lot of what makes it work is construction techniques and several taps on the inductor so that bandspread and...
View ArticleComment by periblepsis on LTSpice Unknown SPICE device type "N"
Place the model you are using in text in your question. You can use the "code" feature to make it list out nicely, too. Also, if possible, in a separate code block put your netlist that you can get...
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Answer by periblepsis for Full wave bridge rectifier with Pi or T filter...
Good question. I have learned a few things (epsilon and revepsilon, by themselves, can't remedy the issue.) I also finally got a moment to add some documentation on the behavioral diode and to try some...
View ArticleComment by periblepsis on How to create a 38 kHz pulsating signal using two...
Two decimal precision? MCU.
View ArticleComment by periblepsis on Are small analog signals more or less susceptible...
@Matt001 The universe cannot observe the DC offset as there is no such thing as an absolute frame of reference for such. However, if taken as a matter of a specific circuit implementation, then the...
View ArticleComment by periblepsis on Help designing a linear voltage regulator
Perhaps the very best book for designing a linear regulator using transistors would be "Switching and Linear Power Supply, Power Converter Design" by Abraham I. Pressman, 1977. It covers everything,...
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Answer by periblepsis for Boolean Algebra Simplification?
There are a couple of intuitive approaches, only in the sense of whether or not you consider the brute force expansion of all the terms as being intuitive.the logic cube (or hypercube)But before doing...
View ArticleComment by periblepsis on Why doesn't my microphone amplifier work?
@LEXORAI You apparently have a 2-terminal condenser mic (no internal jfet as commonly used in 3-terminal cheap electrets.) You should carefully examine the necessary kind of circuit, such as found...
View ArticleComment by periblepsis on Are the answers of this questions all incorrect?
@SpehroPefhany No, you have the right of it. (Don't need to simulate.) I think LEXOR just didn't follow the reason why you would arrive at -15 j (which makes sense) nor how to then combine things,...
View ArticleComment by periblepsis on What types of outputs apart from Open Drain/Open...
I've little interest in providing a survey. But there are push pull (2-quadrant) outputs like are found in HC logic, pseudo push-pull like traditional TTL which sources a lot less than it sinks, and...
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Answer by periblepsis for Are the answers of this questions all incorrect?
This is your circuit.simulate this circuit– Schematic created using CircuitLabThe applied voltage, \$V_x\$, across \$C_1\$ and \$R_1\$ must be the same. It cannot be otherwise. But a resistor responds...
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Answer by periblepsis for Why is my band pass filter giving a gain of 0.5 in...
It might be easiest to see from this run:The constraints I used were to set up \$C_1\$ and \$R_1\$ to possess the high-pass frequency indicated by the fixed HP parameter shown, \$55\:\text{kHz}\$, and...
View ArticleComment by periblepsis on Why does this vintage DRAM chip enable circuit...
I like Tim's explanation. But it's also possible that the designer saw this on page 6-3 of the 1976 TI databook and just selected the exact same value. And that the reasoning went no further.
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Answer by periblepsis for Why is my band pass filter giving a gain of 0.5 in...
It might be easiest to see from this run:The constraints I used were to set up \$C_1\$ and \$R_1\$ to possess the high-pass frequency indicated by the fixed HP parameter shown, \$55\:\text{kHz}\$, and...
View ArticleComment by periblepsis on How to solve maximum transfer question?
It looks to me as though the dependent source must be 880 V. Not sure there is a finite maximum power into R, as a result of that fact. It's directly applied to R. (Vo = (100 V * 22k*40k + 3*Vo *...
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