Timeline for Attenuator noise figure and loss
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Mar 22, 2018 at 23:43 | comment | added | Terrabits | Isn't the reason why the 50 ohm attenuator adds the equivalent noise of a 50 ohm resistor due to the fact that it "looks" like that impedance at the output? Hence there has to be some real part; it couldn't be made out of capacitors or inductors only. As far as electron paths, I don't think this explains the noise. You could conduct similar thought experiments at 0 k. Still, some number of electrons will flow in a particular direction but the noise contribution of that passive part will be 0. | |
| May 13, 2014 at 16:49 | history | edited | endolith | CC BY-SA 3.0 |
just edit the answer to say the correct thing
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| Apr 1, 2013 at 17:40 | history | edited | user16324 | CC BY-SA 3.0 |
added 45 characters in body
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| Apr 1, 2013 at 14:58 | history | edited | user16324 | CC BY-SA 3.0 |
added 1541 characters in body
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| Apr 1, 2013 at 13:15 | comment | added | user968243 | Thanks for the answer. I've added the paragraphs the I don't understand. It says that an attenuator can't attenuate the noise below the noise floor basically; however, I don't understand where this noise comes from... Does it come from the resistors in the attenuator or? | |
| Apr 1, 2013 at 12:22 | history | answered | user16324 | CC BY-SA 3.0 |