Transistors 101 ep3: Common Emitter Amplifier 1
ฝัง
- เผยแพร่เมื่อ 19 ต.ค. 2024
- A BJT current source transforms a voltage into a current.
Adding a collector resistor transforms that current back into a higher voltage, resulting in an amplifier.
We design our first 1-transistor amplifier, breadboard and measure it.
Project GitHub: github.com/ken...
CREDITS:
Music:
"Apero Hour" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
creativecommons...
“Light Sting” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
creativecommons...
Graphics:
“Raised hand (#1)” OpenClipArt user ‘oksmith’.
Public domain.
openclipart.or...
“Georg Simon Ohm.”
Public domain.
commons.wikime...
00:11 Intro
00:49 Current source: voltage to current converter
01:47 Current-to-voltage converter?
02:46 Voltage source
04:39 Building and testing voltage source
06:24 Evaluating voltage source
07:35 Our first amplifier
08:19 AC coupled input to amp
09:19 Building and testing the amp
10:51 Outro
I am 66, and for the 1st time in my life learning electronics in right earnest. I really love your lessons. And BTW, What is the Spice software that you are using Sir?
I'm using CircuitJS (www.falstad.com/circuit/circuitjs.html) to do the simulations. It's free and runs in the browser. Where I have circuit simulations in the video, I try to include the CircuitJS links in the description and on the project GitHub, so that viewers can follow along with the exact models I used.
Flexing your 60k counts meter, the yellow one looks to be 10k counts. Nice. Cant wait to get a better look at your scope. Edit: only had to watch a little further. I'm a big fan of Rigol.
The yellow meter is one I got when I was in grad school in the 1980's, on a grad-student budget. It still works. The lack of auto-ranging is annoying, but it's fine as a second meter.
Rigol has a lot of bang for the buck. I picked it out because that's the scope I seem to see on half the electronics-hacker TH-cam channels I watch, and the other ones I see are all at least twice the price. I've only a few complaints so far, relating to some really weird quantization artifacts. (The values appear to be quantized once in the A/D, and then again going to the screen, with the result that on some scales, there are screen pixels that never light.)
One of these months I want to do a video or three on restoring the Tektronix analog oscilloscope that I picked up at a surplus auction in the 1980s.
I would like to see a video of using the X/Y mode on the scope and the sweep mode of a function generator. I have both and have never used either (X/Y mode and sweep). I think we have the same models of each instrument. As an aside your voice volume varies quite a bit and would benefit from some normalization. Thank you for the video!
@justovision X/Y on the scope is in the video about Schmitt triggers, demo-ing the hysteresis loop. Sweep on the function Gen will come when I start on filters. Stay tuned!
@@KludgesFromKevinsCave Thanks, I'll check that video out.
Thanks for the remarks about the audio. I was using an audio compressor in 'kdenlive' but owing to a misconfiguration, it wasn't actually compressing. It'll be a few weeks before the problem's fixed - I try to run a 4-6 video backlog - but I'll try to be more careful moving forward. Still learning this video stuff!