Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to sense Pico-Ampere current? Very low freq.

Status
Not open for further replies.
yolande_yj

yolande_yj

Full Member level 3
Joined
Jan 20, 2005
Messages
152
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Activity points
1,647
By integration?
Any reference book or paper? Thanks.
 

integartion is a solution for you. how about the amplitude of you current? If the current is smaller than the leakage current of your circuit. it is impossible for you to sense it.
 

CMOS is very noisy, the best amplifier we can find in the market has around several nV/sqrHz input refer noise and they use JFET as input stage I think, how to use CMOS to sense Pico-Ampere current? Any paper, book?
 

a picoamp is 6 electrons per microsecond, you could practically name them like pets at such a low rate.

but apparently it is done, here is a schematic

h**p://www.electronics-lab.com/projects/test/011/
 

cherrytart said:
a picoamp is 6 electrons per microsecond, you could practically name them like pets at such a low rate.

but apparently it is done, here is a schematic

h**p://www.electronics-lab.com/projects/test/011/
Click to expand...

Picoamp measurements are done routinely for patch-clamp research of the currents through the cell wall. Although, I don't know what's the circuit. Thanks a lot for the link. I need to measure whopping nanoamps.
 

Keithley's handbook may help
but I think what help me most for the low noise detection is "Low noise electronic system design" by CD mo??
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top