Comment by periblepsis on How can I build a full wave rectifier with a...
@SoonaPaana If a shared ground and opamps allowed, you do not need (nor want) a bridge rectifier. (I don't think so.) You can just set up an opamp follower, an opamp inverter, tie their outputs through...
View ArticleComment by periblepsis on Transimpedance amplifier oscillating at high gain...
Jim Todson and Bonnie C. Baker both used to work at Burr Brown and have written up some nice white papers on photodiode transimpedance amplifier front end stages -- both for noise and for oscillation...
View ArticleComment by periblepsis on Reforming an electrolyctic capacitor and stopping...
I don't. But Heathkit used to make an IT-28 used for this purpose (up to 600 V, if memory serves.) Might look at its schematic to try answering questions.
View ArticleComment by periblepsis on Generating a clear sinusoidal wave through the...
user36, Use an MCU and look up Linear Predictive Coding. It's a good fit for the application. You may need to partition the LP coefficients. But that's not a problem. It's a feature for a case like this.
View ArticleComment by periblepsis on Watching an open-collector input without disturbing it
Hmm. Assuming that the black box input is really more of a wire-OR situation (both observed and also driven), not unlike I've done countless times or as was done on the shared APIC bus that I remember...
View ArticleComment by periblepsis on How to simplify this AC electrical circuit
Then can you ground the bottom node and write down the two KCL equations for the left and right side upper nodes? (For the top schematic.)
View ArticleComment by periblepsis on How would I decide on the best LED intensity for...
Enough said, I guess. I'll remove them now. Just distracting others at this point.
View ArticleComment by periblepsis on Is this equivalent circuit transform involving...
The problem is under-constrained. If you apply a voltage across ST3 and ST4 what voltage would you expect to see at ST1 and ST2? And does that matter?
View ArticleComment by periblepsis on How Does This Diode Affect This Circuit?
Depending on the circuit before the LED (open or shorted across the LED location) there will either be 0 A or about 200 mA. After the LED is inserted as shown, there will be anywhere from 100 mA to 130...
View ArticleComment by periblepsis on What Specific Optimizations Can ARM Implementations...
I worked at Intel (circa P Pro/P II) on chipsets. This question would take at least one book to cover well. Stripping it down to an over-simplification which is only a cartoon caricature and misses...
View ArticleComment by periblepsis on Is this equation in the photodiode model wrong?
@ty_1917 Get Phil Hobbs' book, Building Electro-Optical Systems, and read it. Learn. I think Jerald Graeme also has a book, Photodiode Amplifiers: Op Amp Solutions that may be worth a moment. Best wishes.
View ArticleComment by periblepsis on Invert the negative ac to positive ac
@ThePhoton I think this is the same problem as the earlier question. If so, it's this DC transfer function. The transfer function doesn't appear to require the input source to share a ground. But Soona...
View ArticleAnswer by periblepsis for How to simplify this AC electrical circuit
You've put some work into thinking through some of the KCL and I can see better where you need help.Here's the...
View ArticleComment by periblepsis on Feedback compensation on a buck-boost led driver
Just a quick 'sanity-check' before bothering with anything else. Your last equation is found on page 45, Eq. 89. I note \${\large +}\$ in the denominator. You show \${\large -}\$ there. Just a typo? Or...
View ArticleComment by periblepsis on Can I use a handheld spectrophotometer to calibrate...
@BilalBahadırAkbulut I did this alone. But if you are looking to make measurements (A) with more than one instrument, (B) with the same instrument or with more than one where you want similar readings...
View ArticleComment by periblepsis on What's the purpose of temperature ratings of...
Totally bare copper wire gets dark with heat and time. The darkening, roughly speaking, is an oxidation rate that takes place at rates \$\propto T^4\$ (in theory anyway.)
View ArticleComment by periblepsis on Implementation of Op-Amp
Fabio provides a caricature that misses out on many important details. For example, R14's wiper trims the outputs, as said. But its magnitude provides significant emitter degeneration, temperature...
View ArticleComment by periblepsis on How do I design a Multistage Amplifier with given...
Just skimming I don't think you are in a place where you can design this on your own. I don't want to help with this specific design nor do I want to haul you off in another unwanted direction. The...
View ArticleComment by periblepsis on What to do when you've discovered/invented an...
I have never regretted exposing company secrets. ;) And without an existing contract to breach, there's no standing for plaintiffs to make claims against defendants (with respect to trade secret...
View ArticleComment by periblepsis on Weird pass-transistor MUX circuit
If either \$S_0\$ or \$S_1\$ or both are active the lower section (\$B_x\$) is forwarded. If both are inactive then the upper section (\$A_x\$) is forwarded. However, we are missing some context...
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