Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1982-06-21
1985-06-04
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 68, G11B 509
Patent
active
045218170
ABSTRACT:
In a circuit arrangement for magnetic recording apparatus having a multi-track head, a resistor network is provided so that each operational amplifier associated with each magnetic head included in the multi-track head functions as a constant-current circuit. The resistances of four resistors in the resistor network are selected so that no current flows via one resistor interposed between the output terminal of the operational amplifier and a terminal of the head in receipt of no input signal even if leakage flux emitted from adjacent head is picked up by the head. Therefore, undesirable influence due to crosstalk can be effectively prevented, providing high quality reproduction in the case of audio signal recording or low bit error rate in the case of digital recording.
REFERENCES:
patent: 4386378 (1983-05-01), Guisinger
"Design of Magnetic Recording & Playback Amplifiers"-S. Sah et al., IEE-IERE Proceedings, India, vol. 13, No. 2, pp. 39-46, Mar. 1975.
Tietze/Schenk Halbleiter-Schaltungstechnik, vol. 5, 1980, publishing house Springer, pp. 244 to 245.
Mori Takaro
Sasamura Kohhei
Canney Vincent P.
Victor Company of Japan , Limited
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