electrometer amplifier

electrometer amplifier

[i‚lek′träm·əd·ər ′am·plə‚fī·ər]
(electronics)
A low-noise amplifier having sufficiently low current drift and other characteristics required for measuring currents smaller than 10-12 ampere.
References in periodicals archive ?
Because of the very high resistivities of the undoped films, it was necessary to build a very high impedance differential electrometer amplifier (DEA) to measure the Hall voltage.