Title :
Magnetic Recording with AC Bias
Author_Institution :
Armour Research Foundation, Illinois Institute of Technology, Chicago, Ill.
Abstract :
The function of alternating-current (ac) bias in magnetic recording is analyzed in a manner similar to that used to explain amplitude modulation. Certain simplifying assumptions are made to facilitate manipulation of mathematical expressions. The analytical results are compared with experimental observations of harmonic distortion, amplitude of fundamental, spurious recorded frequencies, frequency response, difficulty of erasure, and the like.
Keywords :
Amplitude modulation; Audio recording; Frequency; Harmonic distortion; Linearity; Magnetic analysis; Magnetic flux; Magnetic materials; Magnetic recording; Power harmonic filters;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1951.231090
