Timeline for Johnson Noise experimental measurement
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 7, 2020 at 15:05 | comment | added | learner | I'm undergraduate student and I want to do this experiment on my own for better understanding and I don't have much resources I'm trying to keep everything simple so I need simple circuitry which will give me a considerable precise output (surely I won't get precise value equal to theoretical value but I'm trying for somewhat considerable value) as I just want to understand the experiment. | |
| Jan 7, 2020 at 13:54 | comment | added | hyportnex | It depends on at what frequency you wish to examine the noise. The LT1024 is probably not useful beyond 100kHz, and you also need a bandpass filter between the resistor and the amplifier to limit what you are amplifying, and then a narrow bandpass filter in which you measure the noise power; I doubt that the DMM's own input bandwidth will work, but I do not know. I suggest for these further details you post your question on electronics.stackexchange.com . | |
| Jan 7, 2020 at 13:31 | vote | accept | learner | ||
| Jan 7, 2020 at 13:31 | |||||
| Jan 7, 2020 at 13:28 | comment | added | learner | Please suggest me low noise amplifier I'm thinking of using LT1024 will it suitable or I should choose different one. And I'm using Keithley 195A Digital Multimeter (6 and half) instead of spectrum analyzer will it work for getting the voltage values. I have one more query if I use bandwidth of the DMM as the bandwidth of the circuit will it give appropriate output? | |
| Dec 24, 2019 at 12:06 | comment | added | hyportnex | Unclear to me what it is that you would like to simulate: the spectrum analyzer's operation or the physics of Johnson noise? If the former, then you can use software Matlab/Simulink, ADS, AWR, etc. If the physics of noise generation interests you then you should ask this on the forum as a separate question, for I cannot help you with it. | |
| Dec 24, 2019 at 4:41 | comment | added | learner | Can I simulate this upto high precision level? Suitable simulator/software? | |
| Sep 15, 2019 at 20:13 | history | answered | hyportnex | CC BY-SA 4.0 |