Circuitry for reversing a magnetic field

Details Circuitry for reversing a magnetic field Circuitry for reversing a magnetic field

1989-10-20

1993-07-20

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Read only detector using light for reading magnetically...

360 59, 369 13, 361143, 361152, G11B 5127, G11B 502, G11B 1100, H01H 4700

Patent

active

052299023

ABSTRACT:
A circuit for reversing a magnetic field in which a bifilar coil is provided with a series of two oppositely-wound windings that are connected together at one end to form a junction. A source of current is connected in series with an inductive resistor, and this series circuit is connected at one end to the junction. At the other end of this series circuit, there is a voltage supply source. Each of the two oppositely-wound windings has its other end connected to a variable switch. The two variable switches have control inputs that are connected to two outputs from a control unit which applies a reference potential to each winding through the variable switch, so that all current from the source of current flows through each winding upon closure of the respective variable switch.

REFERENCES:
patent: 4750159 (1988-06-01), Yoda
patent: 4926403 (1990-05-01), Tsuyuguchi et al.
patent: 4937802 (1990-06-01), Omori et al.
patent: 4996677 (1991-02-01), Naito et al.

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