SR555 - Current Preamplifier

sr555SR555 ... $1095 (U.S. list) k with SRS lock-in amplifiers. Current amplifiers provide gain close to the experimental detector, allowing the user to minimize input cable length and its cThe SR555 is a low-noise, hh-bandwidth, fixed-gain current (trans-impedance) amplifier desned to work with SRS lockin amplifiers. Current amplifiers provide gain close to