A. Band et J. Unguris, OPTICALLY ISOLATED CURRENT-TO-VOLTAGE CONVERTER FOR AN ELECTRON OPTICS SYSTEM, Review of scientific instruments, 68(1), 1997, pp. 250-251
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-1 mu A On the biased elements of an electron optic
s system at voltages up to 3.5 kV. The design takes advantage of low-l
eakage, low-power complementary metal-oxide semiconductor operational
amplifiers as well as Linear optocouplers to create a low-noise batter
y-powered front end with an expected battery life of three years using
a single 9 V lithium battery.