[volt-nuts] How to measure micro-amp currents and have low impedance?

[Bob Paddock]

>> I'm not familiar with Patterson's work, and Google was not much help.
>>
>> Will you point me to a specific paper or schematic please?
>>
> Its not particularly new, you have probably seen the circuit many times
> (the name has been around for at least 50 years or so) see:

You're right, I've seen lots of those circuits, just never recall the
name Patterson
being mentioned related to them.

Thank you for the link.

> http://www.electronics.dit.ie/staff/ypanarin/Lecture%20Notes/DT021-4/6LogAntiLogAmplifiers.pdf