Title :
Paralleling of Preamplifier Input Stages for a Low-Noise, Wideband Termination of Low-Impedance Transmission Lines
Author :
Kopp, M.K. ; Valentine, K.H.
Author_Institution :
Instrumentation and Controls Division Oak Ridge National Laboratory Oak Ridge, Tennessee 37831, USA
Abstract :
A new concept of paralleling input stages was developed to meet the requirements for a low-noise, wideband preamplifier that matches the transmissionline impedance of ultrahigh-sensitivity fission counters. The prototypic preamplifier consists of four dual-feedback-path amplifiers and a summing amplifier. It has an 18-pA/¿Hz equivalent input noise current density, a 60-MHz bandwidth, a 25-¿ input impedance, and a 5-k¿ transimpedance.
Keywords :
Bandwidth; Broadband amplifiers; Counting circuits; Current density; Impedance; Preamplifiers; Pulse amplifiers; Transmission lines; Voltage; Wideband;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1985.4336791
