Help reading Noise Characteristic graph for sub-nanovolt amp

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SUMMARY

The forum discussion focuses on interpreting the noise characteristic graph for the A20 sub-nanovolt amplifier from EM Electronics. The user is specifically confused about which of the four listed filters correlates with the graph's time constant of 20 seconds, as none of the filters match this value. The user aims to visualize the graph with a 1k filter setting, but struggles with the interpolation of reference points. Recommendations include consulting the manufacturer for clarity and reviewing a provided paper on noise basics for further understanding.

PREREQUISITES
  • Understanding of noise characteristic graphs
  • Familiarity with filter settings and time constants
  • Basic knowledge of amplifier specifications
  • Ability to interpret technical documentation
NEXT STEPS
  • Research the specific filter settings for the A20 amplifier
  • Learn about noise characteristic graphs in electronic components
  • Explore the implications of different time constants on amplifier performance
  • Review the provided paper on noise basics from Noisecom
USEFUL FOR

Engineers, electronics hobbyists, and researchers involved in amplifier design and noise analysis will benefit from this discussion.

ArthurRukin
These are the links to the specific product I am looking at and its noise characteristic graph.

http://www.emelectronics.co.uk/a20.html
http://www.emelectronics.co.uk/graphs/a20graph.htm

I understand the graph for the most part, but I am confused about which one of the four filters that are listed in the product description is used to create the graph. The filters give different time constants, but none of them are 20 seconds, which is what the time constant is in the case of the graph.

My ultimate goal is to try to figure out what the graph would look like with a 1k filter setting in the amp.
Any help is greatly appreciated. Thank you!
 
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I tried :frown: but they are mixing reference points and their graphs can be only roughly interpolated. I recommend you ask the manufacturer, or find a different one.
That said, here is a paper that may help explain things a bit. http://noisecom.com/~/media/Noisecom/noisebasics.ashx

EDIT: added link
 
Last edited:

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