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Instantaneous Readout of a Storage/Decoder Magnetic Bubble Domain System

IP.com Disclosure Number: IPCOM000078190D
Original Publication Date: 1972-Nov-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Chang, H: AUTHOR [+3]

Abstract

The use of a compressor circuit having a plurality of idler positions in combination with a read decoder and a storage area for magnetic bubble domains, allows rapid sensing and minimizes and equalizes delays for various locations in storage. Fig. 1 is a block diagram of the system, in which bubble domains are stored in the area marked storage and are selectively taken from storage by the read decoder. Consequently, a plurality of inputs 1, 2, ... 5 are provided to the various idler positions. This is a row of asymmetric idlers. When all idlers are filled with domains there is a tendency for the domains to advance to the right to the sensor. However, this tendency is not realized, until a domain is injected at the appropriate phase of the in-plane rotating field H. In the specific embodiment of Fig.

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Instantaneous Readout of a Storage/Decoder Magnetic Bubble Domain System

The use of a compressor circuit having a plurality of idler positions in combination with a read decoder and a storage area for magnetic bubble domains, allows rapid sensing and minimizes and equalizes delays for various locations in storage. Fig. 1 is a block diagram of the system, in which bubble domains are stored in the area marked storage and are selectively taken from storage by the read decoder. Consequently, a plurality of inputs 1, 2, ... 5 are provided to the various idler positions. This is a row of asymmetric idlers. When all idlers are filled with domains there is a tendency for the domains to advance to the right to the sensor. However, this tendency is not realized, until a domain is injected at the appropriate phase of the in-plane rotating field H. In the specific embodiment of Fig. 2, the movement to the right occurs when field H is in direction 4.

The magnetostatic force between a bubble entering the idler along one of the information channels 1-5 with the domain in the idler, advances the domains such that the last domain moves to the sensor. Since the idlers are asymmetrical, domains can only advance toward the right. Additionally, only one idler at a time receives information from the read decoder.

Fig. 2 shows an arrangement of idler positions together with portions of the information channels from the read decoder. In this particular embodiment, movement to the right...