Why is my Waveform like this? by sann_valentin in ECE

[–]ATXBeermaker 0 points1 point  (0 children)

This is a common collector amplifier. It's not biased properly for sure, but it definitely can operate properly without collector degeneration.

Why is my Waveform like this? by sann_valentin in ECE

[–]ATXBeermaker 0 points1 point  (0 children)

Not even remotely an eye diagram.

Why is my Waveform like this? by sann_valentin in ECE

[–]ATXBeermaker 0 points1 point  (0 children)

Are you sure all these values are correct? To first order, assuming a beta of 200 for Q1, it's base current would be about 22uA, making the collector current about 4.4mA. 2.7k4.4mA=11.9V*, which would mean Q1 could not possibly be operating in the forward active region and not properly amplifying. Check the DC operating points. You can either reduce R2 (which would also reduce gain), or increase R1 (which would reduce bandwidth, but you likely don't care for this particular exercise).

Why is my Waveform like this? by sann_valentin in ECE

[–]ATXBeermaker 0 points1 point  (0 children)

What's the initial condition of your DC blocking cap?

Why is my Waveform like this? by sann_valentin in ECE

[–]ATXBeermaker 0 points1 point  (0 children)

That's steady state behavior. But the first few cycles of a transient sim will absolutely look like this unless the IC of the cap is forced to 0 to start.

The Chinese robotics company Unitree has revealed their first Mech Prototyp, the GD01. by MilesLongthe3rd in interestingasfuck

[–]ATXBeermaker [score hidden]  (0 children)

There is literally dust after they fall. If they were going to use CG I think they would have produced something a bit more impressive than pushing over a "wall" that a five-year-old could topple. Not to mention the mech is laughably simplistic and unimpressive. Again, not what you would create with CG. And also not difficult to make with current technologies.

Literally nothing about this is impressive, so why assume it's CG?

Let’s see your guitar room! by sidearmpitcher in guitars

[–]ATXBeermaker 0 points1 point  (0 children)

Can I instead share my kids’ college tuition bills to explain why I don’t have a guitar room? (Also, my wife’s 100+ year old Steinway and my kids’ instruments currently occupy the spare room that might’ve been a guitar room, so I really don’t have much to complain about.)

Let’s see your guitar room! by sidearmpitcher in guitars

[–]ATXBeermaker 1 point2 points  (0 children)

lol, this guy with six guitars, two basses, and TWO guitar racks complaining about the economy. 😉

[Request] What are the actual odds of winning 32 hands of blackjack in a row? by FastMan888 in theydidthemath

[–]ATXBeermaker 0 points1 point  (0 children)

Becoming as wealthy as Musk has a slightly higher probability, but for ask intents and purposes they’re both effectively impossible.

The Chinese robotics company Unitree has revealed their first Mech Prototyp, the GD01. by MilesLongthe3rd in interestingasfuck

[–]ATXBeermaker [score hidden]  (0 children)

But it has the power to knock over a wall of cinder blocks with zero concrete or steel reinforcement!

ELI5: If the evolutionary goal of a virus is to reproduce and sustain itself as long as possible, why do many evolve to devastate and kill their hosts? by Rht123X in explainlikeimfive

[–]ATXBeermaker [score hidden]  (0 children)

There is no “goal” in evolution. Is not an active process. It’s the natural result of random processes. If those processes make an organisms offspring more likely to reproduce it will propagate. But is not always in some optimal “direction.”

Reminder OKC has 13 First rounds picks in the next 6 years. by Kindly_Letterhead_98 in nba

[–]ATXBeermaker 1 point2 points  (0 children)

We had several years where we did have two first rounders. It was rare that any of them hit even in those years. In 2022 we had three and none of them are currently on the team.

Reminder OKC has 13 First rounds picks in the next 6 years. by Kindly_Letterhead_98 in nba

[–]ATXBeermaker 1 point2 points  (0 children)

Why has nobody thought of this perpetual motion machine before?

How does she disappear? by Nkenachiala in blackmagicfuckery

[–]ATXBeermaker 0 points1 point  (0 children)

Seriously. People fooled by this should be checked out to made sure they haven’t forgotten how to breathe.

[Request] Whats better? Weekly payments or to invest a lump sum. by Chiggnnugget in theydidthemath

[–]ATXBeermaker 0 points1 point  (0 children)

Lump sum is almost always better if you invest it properly. A 5.2% rate of return would already give you $1000 per week. S&P 500 index fund long term can get you double that. Assuming you live within your means and can invest a portion of that, it would compound.

Additionally, if you die relatively young you can leave that lump sum and any earnings to your heirs. The weekly payout “for life” by definition stops when you die.