Accession Number : AD0600271

Title :   DEVELOPMENT OF AN INTERMEDIATE CAPACITY, HIGHSPEED MAGNETIC FILM MEMORY SYSTEM.

Descriptive Note : Technical documentary rept., 15 July 62-15 May 63,

Corporate Author : TEXAS INSTRUMENTS INC DALLAS

Personal Author(s) : Toombs,H. D. ; Delhom,L. A.

Report Date : AUG 1963

Pagination or Media Count : 56

Abstract : The report describes the design and development of a magnetic film memory system with a storage capacity of 4096 bits arranged as 512 words of 8 bits each. The word-organized system has a read-write cycle time of 142 nanoseconds. The storage medium consists of continuous sheets of magnetic film deposited on polished aluminum substrates. The location and size of the storage bits are defined by the intersection of the word and digit-sense conductors. A transistor-current transformer matrix is used to perform word selection and to provide an 800-milliampere, 85-nanosecond base width word drive pulse. A bipolar digit pulse of =200-milliampere, 40-nanosecond base width is used. Current switching is used in the low-level logic circuits. Pertinent memory waveforms along with operating results are given. (Author)

Descriptors :   (*DATA STORAGE SYSTEMS, MAGNETIC RECORDING SYSTEMS), (*MAGNETIC RECORDING SYSTEMS, DATA STORAGE SYSTEMS), (*DATA STORAGE SYSTEMS, CIRCUITS), MAGNETIC FIELDS, COMPUTERS, ALUMINUM, TRANSFORMERS, TRANSISTORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE