Static information storage and retrieval – Magnetic bubbles – Bias
Patent
1977-05-25
1978-09-26
Moffitt, James W.
Static information storage and retrieval
Magnetic bubbles
Bias
365 1, 365 8, 365 31, 365 32, 365 43, G11C 1908
Patent
active
041175441
ABSTRACT:
A bias field control arrangement for correcting the bias field in accordance with stability range variations in magnetic domain thin film layers. A thin film layer is provided auxiliary to the layers, which auxiliary layer responds to external environmental conditions such as temperature in a manner substantially identical to that of the magnetic domain layers. A pair of register-detectors are defined on the layer in the form of permalloy domain propagating elements, the dimensions of the elements of one being optimized to propagate domains of a diameter larger than that of a domain of a diameter which is optimum in view of the stability range of the layers and the dimensions of the elements of the other being optimized to propagate domains of a diameter smaller than that of the optimum diameter domain. For normal operation, the domains will be propagated along both channels with equal facility and an output comparison section at the output of the detectors produces no control signal. The common bias field of the layers is thus normal and requires no correction. Should the bias field be too low or too high, domains of a diameter will be generated which will fail to propagate properly along one or the other channels. As a result, an output signal is generated which is employed to provide an augmenting or an opposing field to adjust the bias field upward or downward as required. Any errors in the propagation of domains are thus corrected.
REFERENCES:
patent: 3711841 (1973-01-01), Geusic et al.
patent: 3927234 (1976-09-01), Voegeli
patent: 3927397 (1975-12-01), Chow et al.
Bell Telephone Laboratories Incorporated
Kamstra William H.
Moffitt James W.
LandOfFree
Magnetic single-wall domain bias field control arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic single-wall domain bias field control arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic single-wall domain bias field control arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2094212