MEASURING METHOD OF NOISE CHARACTERISTIC OF AMPLIFIER

PURPOSE:To discriminate on whether noise characteristics of plural amplifiers are normal or not at the same time by connecting the amplifiers in parallel, calculating the output noise voltage of each amplifier at an arithmetic circuit of next stage, and deciding on whether the noise characteristics...

Full description

Saved in:
Bibliographic Details
Main Authors OBATA TOMOJI, ITOU MAKIKO
Format Patent
LanguageEnglish
Published 27.04.1984
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
Online AccessGet full text

Cover

More Information
Summary:PURPOSE:To discriminate on whether noise characteristics of plural amplifiers are normal or not at the same time by connecting the amplifiers in parallel, calculating the output noise voltage of each amplifier at an arithmetic circuit of next stage, and deciding on whether the noise characteristics of the amplifier are normal or not by using the arithmetic ouput. CONSTITUTION:Noise signal source resistances D, D'-D and samples 1'', 2''- n'' are connected in parallel, a noise output voltage developed at each sample is inputted to an operational amplifier (h) through resistances (d), (e), and (f), and the output of the operational amplifier (h) is inputted to a noise voltage measuring device Z'' to decide on whether noise characteristics are normal or not. When resistances (d), (e), (f), and (g) are equal in resistance value, the output voltage of the operational amplifier (h) is the composite voltage of noise output voltage of the respective samples and when there is a sample with defective noise characteristics, this output voltage is abnormally excessive, thus detecting the defective noise characteristics.
Bibliography:Application Number: JP19820185623