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A CARDIO PREAMPLIFIER FOR THE FREE‐ROVING RAT
Author(s) -
Mundl William J.
Publication year - 1965
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1965.tb02638.x
Subject(s) - preamplifier , amplifier , signal (programming language) , transformer , electrical engineering , computer science , voltage , engineering , cmos , programming language
A transistorized amplifier has been designed with the aim of providing a reliable triggering signal for a cardiotachograph when it is recording from small animals. The frequent base‐line instabilities of the cardio signal caused by the animal's movements are eliminated by the use of a transformer at the input. Direct coupling between the stages assures fast recovery of the amplifier from overloads produced by large transient signals. Correct placement of the electrodes is important for obtaining a large electrocardiogram (EKG) signal and for the reduction of artifacts. (W. J. Mundl)