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Improvement of Data Rate in Cylindrical Domain Devices

IP.com Disclosure Number: IPCOM000074291D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Genovese, ER: AUTHOR [+2]

Abstract

In many cylindrical magnetic domain devices, the data rate is limited by the rate at which the cylindrical domain generator can insert domains into an information channel. Often this is considerably lower than the domain propagation rate in the channel. To provide a system in which the data rate is dependent only on channel mobility and bit length an input circulator loop has numerous cylindrical domains propagating in it, which can be selectively gated to information channels.

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Improvement of Data Rate in Cylindrical Domain Devices

In many cylindrical magnetic domain devices, the data rate is limited by the rate at which the cylindrical domain generator can insert domains into an information channel. Often this is considerably lower than the domain propagation rate in the channel. To provide a system in which the data rate is dependent only on channel mobility and bit length an input circulator loop has numerous cylindrical domains propagating in it, which can be selectively gated to information channels.

In Fig. 1, magnetic sheet 10, such as an orthoferrite or a garnet film, has a plurality of shift register loops SR1, SR2,...SRN. Connected to each shift register loop is an input circulating loop 12 which provides the domains for propagation in the shift register loops.

Fig. 2 shows a T and I bar arrangement for the system of Fig. 1. The input circulator loop 12 is located adjacent three shift register loops SR1, SR2, and SR3. Cylindrical domains in input loop 12 are selectively entered into the shift register loops under control of current in windings A, B, and C.

Initial generation of domains in circulating loop 12 can be by any known scheme. When the loop 12 is filled with domains, these domains are selectively gated into the shift register loops. Fig. 3 shows a truth table in which a "1" represents a positive current in a control winding A, B, C, while a "0" indicates a negative current through a control winding.

As an example, con...