DocumentCode :
3250175
Title :
Transistor circuits for magnetic drum recording
Author :
Kuster, G.
Author_Institution :
Ferranti Electric Limited, Toronto, Canada
Volume :
0
fYear :
1957
fDate :
14-15 Feb. 1957
Firstpage :
6
Lastpage :
6
Abstract :
Drum recording is accomplished bypassingcurrent through a magnetically soft write head placed in close proximity to a magnetically hard drum surface. Flux from the head resulta in magnetized areas on the drum surface. Drum coatings and heads presently in use require writing currents in the order of 1 ampere. Head impedances are typically 2 to 5 ohms. This means the writing circuit must supply severa! watts of power. The use of the following three basic circuits is outlined: power one-shots, bloc king oscillators, and class B amplifiera.
Keywords :
Counting circuits; Driver circuits; Magnetic circuits; Magnetic recording; Pulse circuits;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State Circuits Conference. Digest of Technical Papers. 1957 IEEE International
Conference_Location :
Philadelphia, PA, USA
Type :
conf
DOI :
10.1109/ISSCC.1957.1183975
Filename :
1183975
Link To Document :
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