What is the Optimal Current Source for Extremely Low Current Applications?

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SUMMARY

The discussion centers on sourcing extremely low current levels, specifically 1.35 yoctoamps with a tolerance of ±0.10 yoctoamps. Keithley sourcemeters are mentioned as capable of measuring down to femtoamperes, but no current source for yoctoamps is readily available on the market, indicating a significant gap in the technology. The conversation highlights the extreme precision required for such applications, suggesting that any viable solution would likely be prohibitively expensive.

PREREQUISITES
  • Understanding of current measurement units, specifically yoctoamps and femtoamperes.
  • Familiarity with precision measurement tools like Keithley sourcemeters.
  • Knowledge of the applications requiring ultra-low current sources.
  • Basic concepts of electron flow and charge measurement.
NEXT STEPS
  • Research Keithley sourcemeters and their specifications for low current applications.
  • Explore alternative technologies for generating and measuring yoctoamp currents.
  • Investigate the applications that necessitate such low current levels.
  • Learn about advancements in low-current measurement techniques and devices.
USEFUL FOR

Engineers, researchers, and developers working in fields requiring ultra-sensitive current measurements, particularly in physics and advanced electronics applications.

lennybogzy
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an application I'm working on requires 1.35 yoctoamps with a tolerance of + or - 0.10yoctoamps.

Any current-source reccomendations?
 
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lennybogzy said:
an application I'm working on requires 1.35 yoctoamps with a tolerance of + or - 0.10yoctoamps.

Keithly's sourcemeters go down to femtoamperes (one retailer sells them for 13000$)... What kind of application requires yoctoamperes, if I may ask? If such a source exists, you're probably going to have to pay megadollars to get one. Good luck.
 
By the way:

1A = 1C/s = 6.24*1018 electrons per second.

You're asking for a source that sources 10-24 amperes, or about an electron every other day?
 

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