Answer by periblepsis for Thevenin Voltage and Resistance of a circuit
The value of \$V_{\small{X}}\$ is clearly zero volts. Just assume that it is. Then the dependent current source is effectively disconnected from the circuit and can be removed. The \$19\:\Omega\$...
View ArticleComment by periblepsis on Practical way to plot frequency response of circuit...
@Mahkoe There is some intuition to be had here. Can you see the three stage phase shift RC "oscillator" section here? (Not an exact replica, but almost.) Driven directly by x with...
View ArticleComment by periblepsis on I am trying to design a photodiode circuit with TIA...
@Manoj What's the purpose? They both essentially sit at the same corner because a 0.3 Hz separation can't be practically realized. 1% R and C (you don't get that with a C) could give you \$\pm...
View ArticleComment by periblepsis on Why does simple embedded scheduler timing drift...
@Carl I had the pleasure of working for a short time with Dr. Comer (and arguing with him.) ;) He's one of the very few. I'm so glad to hear back after a year and a half that you has also found his...
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Answer by periblepsis for Time constant(s) in a half wave rectifier circuit
LTspice .MODEL cards for diodesI'm glad you left your LTspice snapshot intact in your question. You used the model card .model Diode D(Ron=0.001 Roff=1G Vfwd=0) but the netlist cards for \$D_1\$ and...
View ArticleComment by periblepsis on Time constant(s) in a half wave rectifier circuit
@AmitM At a guess, I suspect those peaks aren’t diode drops. Cp ramps at Ix/Cp=20 V/µs. So I think −0.89 V is the solver overshooting the Vx=0 crossing by one 45 ns step before D2 engages. The 9.3 V is...
View ArticleComment by periblepsis on How can I estimate the resistor value for an LED...
Cedric, Do you want a broader overview that includes a sensitivity equation that expresses variation of current over variation of other parameters? That's an entirely different thing than just...
View ArticleComment by periblepsis on How can I estimate the resistor value for an LED...
I like the way you arranged and also how you chose words for this answer! You didn't miss a beat, including the drop at the pin at first and then allowing that it could be discounted. Nice, short, to...
View ArticleComment by periblepsis on Theoretical maximum bit rate by toggling a single pin
@Rocketm You've not defined terms or the situation thoroughly enough as I read it. Here's an interpretation: (1) both systems have a priori knowledge of their shared nameplated clock rates; (2) both...
View ArticleComment by periblepsis on Need help in designing a low pass filter
The OP doesn't write much but also doesn't write \$R_1=R_2\$ and \$C_1=C_2\$. I just hope they write more.
View ArticleComment by periblepsis on Need help in designing a low pass filter
@SteKulov I get The server at sim.okawa-denshi.jp is taking too long to respond when trying that link with FireFox and some ad-blocking. Brave browser gives me the same "site can't be reached" message...
View ArticleComment by periblepsis on What other components would I need to make this...
There are discussions on the web about it -- it's been around for a long time. And there's the Banggood datasheet on it, too. What have you done to collect information and what skills and tools do you...
View ArticleComment by periblepsis on What parts would I need to make this HD720P 2202M...
There are discussions on the web about it -- it's been around for a long time. And there's the Banggood datasheet on it, too. What have you done to collect information and what skills and tools do you...
View ArticleComment by periblepsis on LTspice for class D amplifier simulation
Check with LTspice GROUPS.IO group on the web. Sign in (get accepted if not already) and just ask them. They are great people and very very helpful. Chances are someone there will track one down for...
View ArticleComment by periblepsis on solderless sma screw mounting RF causaliy problem
I've not even seen a PNA for 120 GHz. But the Kiethley panel looks like what I'd expect to see nearing 120 GHz. It boggles my mind just thinking about the connector and cables while reading "i played...
View ArticleComment by periblepsis on Single-layer fab process for Oscillator
What other constraints do you have? How many external pins? (A wire bonder must be a tool there?) How much die space? Can you directly drive an LED and must you or can you have external active devices?...
View ArticleComment by periblepsis on Discrepancy calculating stored energy in a...
@MarcoMoldenhauer The notation for a definite integral can be phrased that way. The additivity of definite integrals using interval splitting to show that.
View ArticleComment by periblepsis on What are the advantages of elevating a radar to a...
I can supplement with a little history. I was given a decommissioned S-band radar unit built and deployed in 1944 as a naval radar system. The waveguide was about 3x1.5 inches (from memory.) These old...
View ArticleComment by periblepsis on Some questions involving RADAR, antennae, and...
user697763, Optical light is one the order of magnitude of about a micron. 60 GHz radar is about 5 mm, 10000 times longer than green light. So the size of the resolved features should be about 10000...
View ArticleComment by periblepsis on Quartz Digital Wristwatch synced Wirelessly
Arno, I worked with the team producing this watch. (Which tells you where I live.) I still have my pre-production watch as well as a final edition of it here. It actually did run 2 years on a battery,...
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