Comment by periblepsis on Sallen key second order design
Jeep, you aren't getting a gain of 10. Not in the Sallen-Key topology there. Gain and damping factor/Q are mutually dependent on gain and there is no way to get more than a gain of 3, memory serving....
View ArticleComment by periblepsis on LTSpice XVII - 2nd order Butterworth RC high pass...
I don't see an "X" type in the schematic, so I'm assuming this is purely passive. Did you take into account the loading? Because if not then your computation of the -3 dB point is wrong. Please show an...
View ArticleComment by periblepsis on STM32F4 ADC square wave distortion
No responses even in comments in a couple of hours. So do you agree that since the scope, at the ADC input, is showing one thing you appear to accept and the captured data in memory (once the internal...
View ArticleComment by periblepsis on AFCS LTspice noise injection on the input lines
@qrk Google tells me that it is the Air Force Civilian Service. But of course that can't be right. ;) So it might be an Aircraft Flight Control System...?
View ArticleAnswer by periblepsis for Converting this boolean expression to NOR only...
Well, here's my process:$$\begin{align*}F&=\overline{W}Y + W\overline{Y}Z + \overline{W}\overline{X}\overline{Z}\\\\&=\overline{\overline{\overline{W}Y + W\overline{Y}Z +...
View ArticleComment by periblepsis on Sallen key second order design
Good answer. Thanks. My recollections were about a common choice with equal-valued resistor and capacitor values. So +1 for this. And I'm going to add an answer when I get a moment, just to add a few...
View ArticleComment by periblepsis on Inquiring about speakers watts and impedance
@AllenStroker Here's a speaker model developed by an IEEE member who identifies as analog. Note how the speaker is divided up into distinct physical processes that are each modeled separately. Just...
View ArticleComment by periblepsis on Designing the CMOS IC 555
@EdinFifić Thanks for sharing your simple approach to a discrete 555 that one might try and build and perhaps use to understand it better, too. Using a single BJT for each comparator on the voltage...
View ArticleComment by periblepsis on Current mode control vs Voltage mode control
I'll leave this for the experts here. (I'm not one.) But I think it is because current control is very much less prone to the effects of stray/parasitic capacitance.
View ArticleComment by periblepsis on Quadrature encoder interface without capacitor
R1 is obvious and R2 seems to me both protective (to the quad switches) and also perhaps to provide a semi-known/predictable output impedance (2:1, depending on output state is "close enough".) You may...
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Answer by periblepsis for Sallen key second order design
I'd like to add a few quick thoughts to consider in this particular...
View ArticleComment by periblepsis on how to calculate vout/Iin for the given circuit?
What have you been recently studying? It would seem that the appropriate tool to use would be the one being taught, at the time, for the context of this circuit. So what's the context? And what do you...
View ArticleComment by periblepsis on Issue in simulation files
"Is all of this because of this issue and how can i solve it": (1) no idea; and, (2) no idea. You may need to clarify your question better.
View ArticleComment by periblepsis on Opamp Constant Current Driver Weird Behavior
Try giving that 358 a smal negative rail and see if it changes anything.
View ArticleComment by periblepsis on Bipolar analog latch circuit needed
It sounds like your window is bracketed by \$\pm 1\:\text{V}\$ around the ground reference and that any excursion outside this bracket triggers a latch. What supply rails do you have available? What...
View ArticleComment by periblepsis on How to drive a 4 ohm, 5 watts speaker with the...
You will need an amplifier circuit: either buy, or build from plans, or design the plans and build. You will also need some way to convert digital output to analog, in the process: Internal or external.
View ArticleComment by periblepsis on Simplest way to find peak capacitor voltage in this...
@ecksemmess How's your non-linear math skills? Are you familiar with the product-log function, for example? It can be solved that way. (I've done it many times before.) It's just a little bit of...
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Answer by periblepsis for Horowitz Third Edition Figure 2.10 Whys
Just to put things into the schematic editor here, find the following as Figure 2.10B:simulate this circuit– Schematic created using CircuitLab"because only \$\approx 0.6\: \text{mA}\$ of the...
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Answer by periblepsis for Bipolar analog latch circuit needed
I won't answer the entire question. But I'll focus on how you might move the input voltage into range of your \$+5\:\text{V}\$ rail and ground.simulate this circuit– Schematic created using...
View ArticleComment by periblepsis on How to calculate Vout/Vin for the given circuit?
What have you been recently studying? It would seem that the appropriate tool to use would be the one being taught, at the time, for the context of this circuit. So what's the context? And what do you...
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