Optically Isolated Current to Voltage Converter in an Electron Optics System
Alan H. Band, John Unguris
A simple, inexpensive, optically isolated current-to-voltage converter circuit has been developed for the measurement of bipolar currents in the range of 10 pA to 1 %A on the biased elements of an electron optics system at voltages up to 3.5 kV. The design takes advantage of low-leakage, low-power CMOS operational amplifiers as well as linear optocouplers to create a low-noise battery-powered front end with an expected battery life of 3 years using a single 9 V lithium battery.
and Unguris, J.
Optically Isolated Current to Voltage Converter in an Electron Optics System, Review of Scientific Instruments, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=620473
(Accessed June 8, 2023)