Magnetic write circuit

Details Magnetic write circuit Magnetic write circuit

1985-03-04

1987-03-03

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 509

Patent

active

046479880

ABSTRACT:
A magnetic write circuit is provided for converting digital input signals onto magnetic media such as disks. The circuit requires a low supply voltage (i.e., only 5 volts) while providing a relatively high voltage margin from the supply voltage for write operations. A flip-flop is coupled to receive the digital input signal and provides first and second complimentary output signals for driving a pair of differentially connected transistors. A coil is coupled between collectors of the transistors and has a midpoint coupled to a voltage source by a diode. A monostable multivibrator is coupled to receive the digital input signal and provides a pulse to a buffer driver. A capacitor is coupled between the buffer driver and the midpoint of the coil for providing an increased voltage to the coil.

REFERENCES:
patent: 4249219 (1981-02-01), Aoi et al.

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