LIKSTROMSFORSTERKARKOPPLING, SOM DEMPAR VEXELSTROMSFORLOPP

摘要

1398805 Voltage measuring ZJEDNOCZONE ZAKLADY ELEKTRONICZNEJ APARATURY POMIAROWEJ 1 Oct 1973 [2 Oct 1972] 45705/73 Heading G1U [Also in Division H3] An amplifier for use in A.C. and D.C. voltage measurement is of adjustable gain and can be switched so as to alternate to A.C. signals. It comprises a differential amplifier W which has two negative feedback paths, the first comprising two-terminal impedance network Z2 and gainadjusting potentiometer d and switch P2 and the second a second two-terminal impedance network Z1 which can be brought into circuit so as to alternate A.C. signals, by means of switch P1.