#signal reflection

[inbabylontheywept]

A Short Essay on Signal Reflections

The essay nobody asked for, but I've been reading about for around a week, and now can explain very easily and intuitively.

When electricity flows from a region with low impedance to a region with high impedance, a reflection of the signal passes back up the cable towards the source. This tends to make the most intuitive sense to people - after all, the high impedance region is easy to imagine as a traffic jam, and the ripple going up the line is just all the electrons having to slam their brakes. We've seen this before.

However, you get an identical ripple when going from a region with high impedance to a region with low impedance, which kind of mangles that analogy. You don't see traffic jams in regions where the speed limit goes up, just in places where it goes down.

And so for that, we're going to have to break the signal into two parts.

V=IR is bread and butter, but nobody accounts for those in time. Everyone does DC steady state analysis, and this is slightly weirder. So in a line with low impedance to high, you just look at how much V (voltage) you need to push the same amount of current (I). Since R is getting bigger, you now run out of voltage before you run out of current. So all the voltage gets used up, some of the current gets used up, and the current that no longer has enough voltage to get pushed forward can't enter the new material and thus bounces backwards up the line. The reverse happens with high to low. You now run out of current (I) before you run out of voltage (V) because R got smaller and energy must be conserved, so you get a voltage wave that bounces up the line. So any time R changes you have too much of either current or voltage and the extra gets sent back.

There are some weird implications to this! For example, a zero impedance ground would actually be hella noisy because it would accept 100% of the current into it, but reflect the entire voltage signal back. And an infinite impedance ground would eat the entire voltage field, but reflect 100% of the current back. An ideal ground for low noise needs to have the same impedance as the node its attached to.

[theokusgallery]

I hate that I have reoccurring themes in everything I make. YES this guy has a complex over the fact that everyone prefers his sibling AGAIN. YES he was ostracized by his peers since he was in primary school and never knew why until years later. URGH

[vendettapandav]

EVERYONE LEAVE THIS IS ALL IM GOING TO BE TALKING ABOUT FOR THE NEXT MONTH

LOOK AT HIM. LOOK AT HOW CONFIDENT HE WALKS. LOOK AT HOW FUCKED UP HE LOOKS!

HE GRADUATED FROM BEING GOOFY SCARY TO STRAIGHT UP NIGHTMARE FUEL

[himejoshiangels]

dc I will break into the writers room if I have to. give me a duke solo run called dawn of the signal and make it about him finding his place in the greater gotham community and reconnecting with his old neighborhood and give him a rouge or make him a new rogue that serves as a narrative foil to reflect his flaws but also his strengths and make it 15+ issues long and make him a little more assured in himself but still finding his way, bring up his training arc with Bruce and his time with the other we are robin kids better yet retcon that stupid ass comic that said they're not friends and more BETTER YET make one of them the rogue and have them reconcile and stuff and then talk abt his relationship with his parents and with Bruce and with the other batkids maybe and at the end give him a mural in the narrows

[vpandart]

Finally wrapped up a three-part piece I’ve been working on forever. Super proud of how it came out ❤️

4 years ago I made these OCs for the Reflect Studios series of games. 4 years later, I’ve remade them. These games are such an important part of my life and I’m so glad the dev is still going strong making them ❤️

[tacticalhimbo]

[ screenshot courtesy of chris, who was the first person to complete nightmare mode for dead signal 2.0! ]

[autumnoakes]

was anyone going to tell me that the guardian fight music in botw is a sped-up, frantic version of the music that plays when link is recovering a memory or was i just supposed to check a discord server i never check and find out that way?

[heartepub]

hi viiivvv :3 for ur ask game, ivy + orchid! <3

hi jay <3333

ivy ⇢ what are your ‘tells’ for your emotions and moods? how can someone tell you’re happy, annoyed, upset or tired?

honestly off camera zoom calls have given me a face with subtitles and I'm still in the process of recovering from that LMAOOO ,, though when I'm annoyed/upset it takes me longer to formulate what I say ,, running thoughts through the pr filter and all :"D in contrast I have less of a filter when im happy

I'm the type of person that's tries to balance "if you don't have anything good to say don't say it at all" and "the truth is always the best thing to say"

orchid ⇢ what’s a song you consider to be perfect?

in honor of the only spotify artist who has consistently been in my top 5 for the past 3+ years HAHAHA

ask game!

[malfnction-54]

not much to say here except the drive was peaceful but hard to see lol

[tightjeansjavi]

as we’re days away from ringing in the new year, I’d like to compile a list of your favorite fics and writers on here :) please send me a message in my inbox or DM me if you feel comfortable doing so! 🤍

My goal is to have this list up by NYE!

You can submit any/and as many Pedro character fics as you like, and as many writers!

I’m so grateful to be apart of this talented community of writers. So many stories were shared this year and I can’t wait to see what’s in store for 2024!

-Gi

[adelaidedrubman]

if wildfire were a visual media in addition to jestiny always having a situation appropriate novelty fishing tee at a certain non obvious point in the story john’s “EDEN GATE” knuckle tats would actually begin changing every chapter/episode to something that summarized the situation or hinted at a future plot point

[normalbrothers]

i find this perennial depiction of john as the compassionate caretaking, "good" brother (opposed to tommy, arthur) in fanfiction fascinating tbh. is it a characterization derived from having a lot of children? but he doesn't ... take care of his kids dhhd

[shadowen]

tl;dr: One of my coworkers at Activision Publishing, and one of the most vocal union organizers at the company, was fired in December, allegedly for "promoting violence" by discussing firearm safety. I know Allen; I saw his posts, which the company has since deleted. Firing him was an illegal act of retaliation.

Sign the petition. Support workers. Join a union.

[vendettapandav]

"Non puoi nasconderti per sempre." (You can't hide forever.)

Dead Signal (Reflect Studios, 2023) - Mr. Delfalco

[sleepingexplorer]

actively soliciting song recs for a mixtape/playlist to be titled Who Told That Skinny Goth Boy To Go So Hard

soft rules: goth or goth-adjacent, boy

hard rules: overdramatic, absolute banger

can be from any decade, I mean absolutely any

[justafriend-ql]

Phuwin Tangsakyuen as Nuengdiao Never Let Me Go First Shot