Bubble domain transfer switches

Details Bubble domain transfer switches Bubble domain transfer switches

1977-06-30

1979-11-13

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Plural interacting paths

365 24, 365 30, 365 39, G11C 1908

Patent

active

041745400

ABSTRACT:
These improved current controlled transfer switches are particularly useful for changing the propagation path of very small bubble domains without requiring large amounts of transfer current. The underlying principle is that the transfer operation occurs when the magnitude of the magnetic drive field used to move bubble domains has diminished to a small value, or is zero. This means that the magnetic field due to current in the switch does not have to overcome the effect of the drive field and therefore can be very small while still being effective. This is termed a "start/stop" operation and in one embodiment, current-assisted transfer is achieved by utilizing a change in the sequence of the magnetic drive field (generally an in-plane rotating field) at the time of transfer. In another embodiment, a continuous "three-quadrant" magnetic drive field is used instead of the customary 360.degree. rotating drive field. This three-quadrant field cycle is also the normal cycle for bubble storage operations and bubble motion elsewhere in the magnetic circuit is not disturbed by the switching operation because all devices are designed to operate with only one type of drive field cycle, which is the three-quadrant cycle. Switches operating in accordance with these principles do not have to have a particular design; in fact, several different designs are illustrated.

REFERENCES:
patent: 4070658 (1978-01-01), Giess et al.
IBM Technical Disclosure Bulletin - vol. 17, No. 5, Oct. 1974, p. 1535.
IEEE Transactions on Magnetics - vol. Mag-9, No. 3, Sep. 1973, pp. 481-484.

Affiliated with

Also associated with

Rating

Bubble domain transfer switches does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bubble domain transfer switches, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bubble domain transfer switches will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2273747