Comment by periblepsis on Impedance matching circuit design for an antenna at...
Your antenna is a little bit capacitive. They are suggesting adding a little bit of inductance, which makes sense. The swr looks tolerable. Are you asking if the keysight ADS software wasn't operated...
View ArticleComment by periblepsis on How can i replace buzzer with a speaker or...
@HFAR I used blue color to ask a few questions: here. Since it appears you want to use headphones and since you also want a low component count, it may help to know what's causing this part of the...
View ArticleComment by periblepsis on What is the correct solution to this RISC-V ISA...
This is what I see. I've started at 1, though, not 3. Just FYI.
View ArticleComment by periblepsis on Can you choose the gain AND center the q-point in a...
I discuss a process here. (The explanation of it just requires a simple diagram that I didn't include.)
View ArticleComment by periblepsis on Calculating explicit transfer function for two...
Do you know how to arrange things so that branch-0 of the LambertW can be applied successfully to replicate the paper's results? Or are you just taking their results as gospel but have no experience,...
View ArticleComment by periblepsis on What is the typical data path of Register-Memory...
Get rid of the idea of cache. It's an unnecessary complication to the rest of your question. So assume there is no cache at all. Can you show us where you are stuck? I'd like to see an ALU, memory with...
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Answer by periblepsis for Can you choose the gain AND center the q-point in a...
voltage gainIf I wanted, say, a gain of 20 or 50 would I have to settle for aq-point that wasn't centered between supply voltage and \$V_{CEmin}\$?The quiescent emitter voltage must be more than...
View ArticleComment by periblepsis on Cannot find the derivation for Gain and Q in a MFB...
@VerbalKint Thanks for the catch!! That's most certainly is my typo! At least I propagated my typo. ;) So I had more than one thing to edit back the way it should be in that last math paragraph. Thanks...
View ArticleComment by periblepsis on How to select R and C for adc pin on microcontroller
@Mike Just so you know, their internal values of 30 kOhm and 3 pF provide a tau of 90 ns. It takes about 588 ns for the input to completely settle to 1.5 parts in 1024, 624 ns to settle to 1 part in...
View ArticleComment by periblepsis on Count DC motor operations
@Noob This TI paper might be worth a quick scan. There are some robust units for automotive, with long sturdy cabling if desired. But that paper provides a thought or two to consider.
View ArticleComment by periblepsis on How do I size the resistor and capacitor in a...
Perhaps this site may also help clarify some thoughts.
View ArticleComment by periblepsis on Is there a quad/hex/octal ic with a common control...
Sounds like an XOR function. (Or XNOR.) Would a quad XOR suffice?
View ArticleComment by periblepsis on Is AC mains supply filtering for audio amplifiers...
I agree with @SteveSh. Without specs, who knows? In this picture I show what a decent 10 A EMI filter looks like (see top half) and what a cheap no-spec unit looks like by comparison (see bottom half.)...
View ArticleComment by periblepsis on Coax through ferrite in RF amplifier
The two symmetrical arrangements in the middle may be a pair of \$\frac{\lambda}{16}\$ Chebyshev impedance transformers. At 105 MHz these would be about 7 inches in length, if I'm guessing right. The...
View ArticleAnswer by periblepsis for Band-pass filter characteristic parameters and...
Note that in the following, it's assumed that the coefficients are real-valued and not complex:$$\begin{align*}G_s &= \frac{N_s}{D_s}=\frac{a_2s^2+a_1s+a_0}{b_2s^2+b_1s+b_0}\end{align*}$$Now, for...
View ArticleComment by periblepsis on Using multiple timers PIC18F45K22
@thegandalf13 It has been years for me so I'm not ready to consider more carefully reading your code yet. (Someone else with recent experience may jump in.) But have you ever gotten two timer...
View ArticleComment by periblepsis on How to choose transistor for outdoor sensor circuit...
Using the NPN as an emitter follower isn't a good idea. That's partly why the voltage was too low. Also, at least one and maybe two resistors would be helpful. However, you need to write more about the...
View ArticleComment by periblepsis on Using a DPDT switch for turning on / off a device
The datasheet shows you how the connections are made. It's "non-shorting." So break-before-make type. Have you looked at the datasheet? In any case, you should own one and get a feel for it and check...
View ArticleComment by periblepsis on Using a DPDT switch for turning on / off a device
@Engine None of the first three pins ever connect to any of the last three. The first three pins make up one SPDT and the last three pins make up another SPDT. These two SPDTs are fixed together to...
View ArticleComment by periblepsis on How Can I Improve My Practical Understanding of...
I recommend getting serious about the habit of frequently practicing the redrawing of schematics. Go to this link on the topic by jonk and read carefully through. As a recent example of redrawing...
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