AC bias control circuit for magnetic recording head

Details AC bias control circuit for magnetic recording head AC bias control circuit for magnetic recording head

1995-12-07

1997-01-07

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 68, G11B 503, G11B 502

Patent

active

055923445

ABSTRACT:
An Alternating Current bias control circuit for a magnetic recording head which is suitable to be formed by an Integrated Circuit, wherein a band-pass filter for extracting an audio frequency signal component from a terminal voltage of the magnetic recording head and for supplying the audio frequency signal component to a peak detector is formed by a Resistor-Capacitor circuit. The input impedance of the band-pass filter is made high enough to reduce the power consumption, and the output impedance of the same is made low enough to facilitate impedance matching with the peak detector.

REFERENCES:
patent: 4512005 (1985-04-01), Okano
patent: 4616273 (1986-10-01), Ishii et al.
patent: 5237464 (1993-08-01), Cronch et al.
patent: 5424883 (1995-06-01), Koren

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