Series resonance drive circuit for magnetic bubble memory

Details Series resonance drive circuit for magnetic bubble memory Series resonance drive circuit for magnetic bubble memory

1981-09-18

1983-04-05

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Rotating field circuits

G11C 1908

Patent

active

043793410

ABSTRACT:
A series resonance drive circuit for a magnetic bubble memory comprises a magnetic bubble memory chip or chips, X and Y coils arranged orthogonally to each other to form a rotating magnetic field in a plane of the chip or chips, resonance capacitors connected in series with the X and Y coils to form series resonance circuits with the X and Y coils at a frequency of the rotating magnetic field, A.C. power supplies connected to the resonance circuit, and a reactance device connected to the resonance circuits to compensate a mutual inductance due to a mutual inductive coupling between the X and Y coils and a capacitance due to a capacitive coupling between the X and Y coils. The reactance device includes a mutual inductance device, or an inductance device and a capacitance device.

REFERENCES:
patent: 3720883 (1973-03-01), Hess, Jr. et al.
patent: 3763478 (1973-10-01), Yoshizawa et al.
patent: 3946373 (1976-03-01), Moolenbeek et al.
patent: 3972036 (1976-07-01), Navratil

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