Why use CMOS when a single PMOS does the same logic output?

Here's wiki entry.

https://preview.redd.it/4mevhmpf6no71.png?width=250&format=png&auto=webp&s=135d5a726a6fda65702086a441c2ef4112bac236

So when V1 input is low/high, Vout is also low/high. Just like above.

Forgot to attach:

PMOS

So why not use a single PMOS then?

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πŸ‘€︎ u/triedgetech
πŸ“…︎ Sep 20 2021
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Question about making logic gates with pMos and nMos transistors.

I don't think I fully understand the concept of pMos and nMos transistors. My understanding is that nMos transistors are on when they have a 1 input. pMos is the opposite. My teacher assigned us some simple circuits and we were to determine which gates they are. Here is an example https://i.imgur.com/69ZQeU7.png If the circuit has to connect to ground, and nmos is on with 1 and pmos is on with 0, how is this circuit possible?

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πŸ‘€︎ u/Squinklesquat
πŸ“…︎ Oct 05 2017
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Did you here about the electrical engineer that designed a very inefficient logic gate with pMOS transistors?

It turned out to be an incredibly lame PUN.

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πŸ‘€︎ u/Cheeseball701
πŸ“…︎ Feb 17 2012
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Quitting PMO gets easier with time, mindfulness, effort and logic - ultimately becoming effortless

I posted this reply in another thread and was encouraged to share it via it's own thread, so I'm obliging. The context was why we were practicing semen retention and my answer was along the lines of 'the longer I practiced, the better I felt in every single aspect of my life'. So much so that in time practicing SR has become easy, because what I get from it so drastically outweighs what I get from not practicing it - it's like getting $1k for the price of $1. How in the world can a sensible person turn down that deal if they're thinking logically?

Well someone replied to my reply by asking for more clarity on what I meant by quitting PMO being easy, because it wasn't easy for them. Here's my attempt to respond:

>
>
>It's not that quitting PMO is truly easy, it's that it can be when you begin to see things a certain way. Imagine there was a candy that tasted so good it was almost impossible to resist it. Now imagine this candy was available all over the place and you could get as much of it as you wanted for free. Now imagine this candy not only tasted amazing and was free and available almost anywhere, but 99% of society also said this candy wasn't bad for you, in fact it was healthy to indulge in it and most everyone else was doing it - in fact it's almost strange that you don't eat this candy like everyone else does.
>
>In this scenario it seems next to impossible to abstain from this candy and this is the perspective most of us have (or had) towards PMO. But then one day you get a small doubt in your head about this candy. Sure it tastes great, while you're eating it, but over time you start to realize it may not be so great for you. In fact you didn't notice it at first but your teeth are rotting and you regularly feel like shit. You've actually been diagnosed with diabetes and your body is failing you in a number of ways. You notice that you're incredibly moody when you don't get your candy. At first you think all of this is in your head and maybe you're exaggerating the issues and in fact these things may not have anything to do with the candy at all.. but there's still some doubt and question now brewing in your head. But dammit those candies taste so damn good - fuck it I'm not giving up these candies, everyone else eats them anyways. I'm being paranoid.
>
>So in that scenario it may be a bit easier to quit the candy because now you're starting to see some associations between the negativ

... keep reading on reddit ➑

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πŸ‘€︎ u/NormanMitis
πŸ“…︎ Jan 23 2019
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pMOS and logical 0?

Hi guys! So glad I found this sub, been wondering about this for a long time.

pMOS transistors only conduct while there is a negative voltage applied to the gate, correct?

In CMOS curcuits, the pMOS works like a NOT-gate, correct?

If a logical 0 is just a lack of voltage, how can the pMOS conduct electricity?

I've just started to gain an interest in electronics, so I hope my question isn't too weidly formulated.

Thanks!

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πŸ‘€︎ u/Beamah
πŸ“…︎ Mar 02 2015
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Looking to make an SMD version of the Intel4004, wikichip states the transistors are PMOS, what is a good SMD equivalent for this at less then a dime if possible?
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πŸ‘€︎ u/AuraKSphere
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How do computers translate data sent as electrical impulses into a human readable form on the display? For example, how does serial communication between a microcontroller and a logic analyzer get turned into a timing diagram on the screen?

To be clear, I get at a high level how UART's, SPI, and IΒ²C works and it's not hard to imagine there are plenty of other communication protocols; that's not what I'm asking about. What I want to understand at a low level is how, after the information is received by the receiver device, it's then displayed to the user on a display. How does it go from electrical impulses to images on a screen?

If that's too big of a topic to properly answer here, it'd be really helpful if you could even just tell me the right terminology to start Googling so I can dig into the topic on my own. Right now I'm not even sure how to find good information on it by Googling.

Edit: I'm an electrical engineering student and I'm already fairly solid on digital logic design and circuit analysis, including how transistors are used to implement logic circuit and the basics of how semiconductors work from my classes. My course on logic design ended with us building a schematic for a microcontroller circuit, and my second semester of circuits spent a lot of time on transistors and we learned how a bit about CMOS circuits. I remember a specific homework problem was to show in a diagram how NMOS/PMOS (don't remember which) transistors could be used to build an adder circuit.

Currently, I'm doing a firmware engineer testing co-op and I've been assigned a project to write a program to send information to a microcontroller and they have me doing a lot of self study to give me the background knowledge/skills needed to do that. I started with learning about serial communication methods including SPI and IΒ²C. As I was pondering today what exactly my firmware will need to do, I realized I was missing the layer of abstraction explaining how information is actually displayed in a readable format. I get the serial communication protocols, more or less and I get how, in terms of the math, it makes sense that the received information can be represented via a timing diagram. What I don't get is what's happening with the hardware to take the data sent as electrical impulses and turn them into an image.

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πŸ‘€︎ u/dcfan105
πŸ“…︎ Jan 20 2022
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I think these diagrams are going to have some short circuits.

I'm looking at "https://www.allaboutcircuits.com/technical-articles/implementing-multiplexers-with-pass-transistor-logic" with title "Implementing Multiplexers with Pass-Transistor Logic" by Robert Keim. Under label "The Transmission Gate Multiplexer" I see the circuit diagram I'm adding in the comments. Is it unreasonable to assume a five volt value for logic one and a zero volt value for logic zero? At any rate those values seem like a common choice.

So if {S} has a value of five volts, and {B} also has a value of five volts, then we want to have a value of five volts at {Y}, regardless of what voltage {A} has. And indeed the PMOS transistor by {B} will have a voltage of five volts at its drain, a logical one. But as I understand it, the NMOS transistor by {B} will have a voltage at its drain of a weak logical one, something like 3.5 volts. Won't that result in a short circuit, since the drains of those two transistors are connected to each other?

Similarly, if {S} again has a value of five volts, and {B} has a value of zero volts, then we want to have a value of zero volts at {Y}. And again, the NMOS transistor by {B} will indeed have a voltage of zero volts at its drain, a logical zero. But again (correct me if I'm wrong), the PMOS transistor by {B} will have a voltage at its drain of a weak logical zero, something like 1.5 volts, won't it? Won't that also result in a short circuit, since once again the drains of those two transistors are connected to each other?

I could ask the same questions of the two transistors by {A} should the value at {S} be a logical zero. It seems like this circuit has problems. Am I off base, or do I have a point?

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πŸ‘€︎ u/kvnsmnsn
πŸ“…︎ Jan 08 2022
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SERIOUS: This subreddit needs to understand what a "dad joke" really means.

I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.

Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.

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I’ve got this disease where I can’t stop making airport puns.

The doctor says it terminal.

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Just because it's a joke, doesn't mean it's a dad joke

Alot of great jokes get posted here! However just because you have a joke, doesn't mean it's a dad joke.

THIS IS NOT ABOUT NSFW, THIS IS ABOUT LONG JOKES, BLONDE JOKES, SEXUAL JOKES, KNOCK KNOCK JOKES, POLITICAL JOKES, ETC BEING POSTED IN A DAD JOKE SUB

Try telling these sexual jokes that get posted here, to your kid and see how your spouse likes it.. if that goes well, Try telling one of your friends kid about your sex life being like Coca cola, first it was normal, than light and now zero , and see if the parents are OK with you telling their kid the "dad joke"

I'm not even referencing the NSFW, I'm saying Dad jokes are corny, and sometimes painful, not sexual

So check out r/jokes for all types of jokes

r/unclejokes for dirty jokes

r/3amjokes for real weird and alot of OC

r/cleandadjokes If your really sick of seeing not dad jokes in r/dadjokes

Punchline !

Edit: this is not a post about NSFW , This is about jokes, knock knock jokes, blonde jokes, political jokes etc being posted in a dad joke sub

Edit 2: don't touch the thermostat

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πŸ‘€︎ u/CzarcasmRules
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Blind Girl Here. Give Me Your Best Blind Jokes!

Do your worst!

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I heard that by law you have to turn on your headlights when it’s raining in Sweden.

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Puns make me numb

Mathematical puns makes me number

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So my mom is getting her foot cut off today.. (really)

We told her she can lean on us for support. Although, we are going to have to change her driver's license, her height is going down by a foot. I don't want to go too far out on a limb here but it better not be a hack job.

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Petition to ban rants from this sub

Ants don’t even have the concept fathers, let alone a good dad joke. Keep r/ants out of my r/dadjokes.

But no, seriously. I understand rule 7 is great to have intelligent discussion, but sometimes it feels like 1 in 10 posts here is someone getting upset about the jokes on this sub. Let the mods deal with it, they regulate the sub.

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French fries weren’t cooked in France.

They were cooked in Greece.

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This subreddit is 10 years old now.

I'm surprised it hasn't decade.

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Why does Spider-Man's calendar only have 11 months?

He lost May

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When I was a single man, I had loads of free time.

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You've been hit by
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πŸ‘€︎ u/mordrathe
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My 4 year oldest favourit joke, which he very proudly memorized and told all his teachers.

Two muffins are in an oven, one muffin looks at the other and says "is it just me, or is it hot in here?"

Then the other muffin says "AHH, TALKING MUFFIN!!!"

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πŸ‘€︎ u/smoffatt34920
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I'm sick of you guys posting dumb wordplay in here for awards and upvotes.

Don't you know a good pun is its own reword?

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πŸ‘€︎ u/diggitygiggitycee
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Dropped my best ever dad joke & no one was around to hear it

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies πŸ˜‚

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A priest, a pastor, and a rabbit walk into a blood donation clinic.

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β€œI am probably a type O” said the rabbit.

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What starts with a W and ends with a T

It really does, I swear!

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My wife left me because I couldn’t stop doing impressions of pasta

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Why did Karen press Ctrl+Shift+Delete?

Because she wanted to see the task manager.

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Steve JOBS would have made a better President than Donald Trump

But that’s comparing apples to oranges

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I just flew in from Chernobyl

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My 7 year old daughter just told me this one. I'm so proud. What did the duck say when he bought chapstick?

Put it on my bill

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So 2 trees got arrested in the town I live...

Heard they've been doing some shady business.

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No gains
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I was almost upset that my coffee tasted like dirt today

but then I remembered it was ground this morning.

Edit: Thank you guys for the awards, they're much nicer than the cardboard sleeve I've been using and reassures me that my jokes aren't stale

Edit 2: I have already been made aware that Men In Black 3 has told a version of this joke before. If the joke is not new to you, please enjoy any of the single origin puns in the comments

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How eggs-traordinary
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Duckduckgo
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Geometry sucks
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What is a a bisexual person doing when they’re not dating anybody?

They’re on standbi

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What is the scariest tree?

BamBOO!

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My ten-year-old daughter came up with this at dinner tonight: What do you get if put a copy of Macbeth on top of a dictionary?

A play on words.

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A queen size statement.
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Orion's belt
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Did you know all dogs are made up of only 3 elements?

Calcium, nickel, neon

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What do you call a woman who’s really good at darts?

Amy

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Geddit? No? Only me?
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My son, Luke, loves how I named our kids after Star Wars characters...

My daughter, Chewbecca, not so much.

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I wanna hear your best airplane puns.

Pilot on me!!

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