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....

ความคิดเห็น • 21

  • @rebeccasheng620
    @rebeccasheng620 4 ปีที่แล้ว

    Thanks for posting this vid. The power aspect of Johnson noise is helpful.

  • @yawadjei2854
    @yawadjei2854 10 ปีที่แล้ว

    Great video!

  • @jluke6861
    @jluke6861 2 ปีที่แล้ว

    Great Explanation.

  • @rrroush2313
    @rrroush2313 12 ปีที่แล้ว

    Great Video.

  • @fjs1111
    @fjs1111 2 ปีที่แล้ว

    Excellent Darryl

  • @AugustoWeber
    @AugustoWeber 9 ปีที่แล้ว +13

    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.

    • @erwalsinghjaidka3413
      @erwalsinghjaidka3413 7 ปีที่แล้ว

      completly right......its kelvin and not degree kelvin

  • @izi2bhappy2
    @izi2bhappy2 11 ปีที่แล้ว

    thank you very much!!!

  • @tomiadventures
    @tomiadventures 6 ปีที่แล้ว +1

    your good at explaining. you shoulda kept going :P

  • @ajaykumar-kv9gg
    @ajaykumar-kv9gg 8 ปีที่แล้ว +1

    Nice video

  • @plecto1234
    @plecto1234 10 ปีที่แล้ว +1

    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?

  • @xionggaizan
    @xionggaizan 11 ปีที่แล้ว

    great

  • @soumyajyotipaul4915
    @soumyajyotipaul4915 5 ปีที่แล้ว

    Its good....

  • @ronald1851
    @ronald1851 4 ปีที่แล้ว +1

    Does the voltage change across time? Or is it stable?

    • @ve2zzz
      @ve2zzz 2 ปีที่แล้ว

      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.

  • @darshanpanchal3046
    @darshanpanchal3046 2 ปีที่แล้ว

    what is bandwidfor DC signal??? 0 or 1?

  • @stevenpriston4301
    @stevenpriston4301 6 ปีที่แล้ว

    cool thnks

  • @pepe6666
    @pepe6666 5 ปีที่แล้ว +1

    thanks for the vid. you're right i am too tired to view it. its 2am

  • @nanojack97
    @nanojack97 3 ปีที่แล้ว +1

    OH LONG JOHNSOOON

  • @peterfalconer
    @peterfalconer 5 ปีที่แล้ว +3

    Wait... how do you get the electrons in the resistor?
    What is voltage?
    Who are Current?
    Ohm My God, I DO NOT UNDERSTAND ELECTRONICS!!