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 Bubble domain circuit organization

Details
Inventors: Chen, Thomas T.;
Assignee: Rockwell International Corporation (El Segundo, CA)
Primary Examiner: Habecker; Thomas B.
Assistant Examiner:
Attorney, Agent or Firm: Hamann; H. Fredrick, Weber, Jr.; G. Donald, Rubalcava; Roland G.

An on-chip bubble domain circuit organization. One or more storage registers are connected to a propagation path whereby data in the form of magnetic bubble domains (bubbles) may be transferred into and out of the storage registers. The propagation path includes a generator for producing the initial bubbles which are expanded into any desired number of new bubbles by a unique multiple output replicator. A unique input decoder is utilized to determine to which storage register the bubbles from the replicator will be directed along the propagation path. Those bubbles not selected may be annihilated. An output decoder utilizing essentially the same decoding scheme as the input decoder, selectively receives bubbles from the storage register. A transfer and replicate switch is utilized between the storage register and output decoder to selectively transfer bubbles to the output decoder. The output decoder may collapse all of the bubbles from certain storage registers so that only the information from the selected storage register reaches the detector. The detectors in turn produce the chip output signal. External control electronics are utilized to control the selective operation of the various devices utilized in the propagation path.

DETAILED DESCRIPTION This invention relates to a magnetic bubble domain chip organization using an improved multiple output replicator and decoder scheme.
An improved multiple output replicator substantially reduces the number of generators required in the chip organization by replicating the bubbles from the generator into any desired number of new bubble domains.
The expanding of the bubbles from the multiple replicator is accomplished by utilizing a fast shifting network associated with a passive replicator.
Before the new bubbles reach the respective storage registers, they are decoded by input decoder lines which destroy all bubbles except the selected stream, instead of shifting or delaying the bubbles.
This proposed design assures that the propagation paths will be free of unwanted bubbles which would interfere with the chip operation.
For reading purposes, an output decoder similar to the input decoder is utilized.
All bubbles emanating from the respective storage registers are annihilated except those selected.
Only the information from the selected storage loop reaches the multiple input detector for sensing purposes.



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