Introduction to Thermal Noise
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- เผยแพร่เมื่อ 6 เม.ย. 2011
- Introduction to thermal noise and computation of noise power. More instructional engineering videos can be found at www.engineeringvideos.org.
This video is licensed under the Creative Commons BY-SA license creativecommons.org/licenses/b....
Thanks for posting this vid. The power aspect of Johnson noise is helpful.
It's a very good video. I'd like to salient as small detail. it's Kelvin [K] and not Degree Kelvin [ºK].
I'd like to see more good videos like this.
completly right......its kelvin and not degree kelvin
Great video!
Excellent Darryl
Great Video.
Great Explanation.
thank you very much!!!
your good at explaining. you shoulda kept going :P
Nice video
So how is thermal noise simulated? I though it could be simulated by adding an AC voltage source in series with the resistor, but what would the frequency of the AC source be? I also don't get how the bandwidth of the system makes a difference? Why would a resistor care what the bandwidth of the rest of the system is?
great
thanks for the vid. you're right i am too tired to view it. its 2am
Its good....
Does the voltage change across time? Or is it stable?
As long as the resistor is maintained at 298K on Earth, it is stable. If it is sent in outer Space, the noise level will go down as the device's temperature decreases, down to 4K (the Outer Space's temperature).
That's why the James Webb Space Telescope has been sent so far away from Earth (1,5 million km) : To reduce its temperature to just a few Kelvins and reduce the corresponding noise levels aboard.
what is bandwidfor DC signal??? 0 or 1?
cool thnks
OH LONG JOHNSOOON
Wait... how do you get the electrons in the resistor?
What is voltage?
Who are Current?
Ohm My God, I DO NOT UNDERSTAND ELECTRONICS!!