Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1997-04-30
2000-03-28
Faber, Alan
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 67, 327553, 330254, 330278, G11B 509
Patent
active
060439432
ABSTRACT:
A method and a circuit for correcting asymmetry in a response signal generated by a magneto-resistive head. The magneto-resistive head generates a response signal to transmit digital information read from a magnetic media storage device. The asymmetry is corrected in a negative feedback manner by squaring an output signal, modulating the squared output signal, and subtracting the modulated squared output signal from the response signal to generate the output signal. The circuit employs a differential amplifier as an input stage and a Gilbert multiplier circuit to square the output signal.
REFERENCES:
patent: 3916180 (1975-10-01), Turtle
patent: 5157559 (1992-10-01), Gleason et al.
patent: 5412518 (1995-05-01), Christner et al.
patent: 5418660 (1995-05-01), Sato et al.
Millmon et al, Microelectronics, 2nd Ed., .COPYRGT. Dec. 1987, pp. 760-762.
Abstract of Japanese Pat. No. 408083403 A, Published Mar. 26, 1996, to Toshiba.
Abstract of Japanese Pat. No. 407202575A, Published Aug. 4, 1995, to Tujitsu.
Grebene, Alan, "Monolithic Waveform Generation," IEEE Spectrum, pp. 378-384, Apr. 1972.
Gray and Meyer, Analysis and Design of Analog Integrated Circuits, John Wiley & Sons, Toronto, 1977, pp. 562-563.
Patti Giuseppe
Rezzi Francesco
Carlson David V.
Faber Alan
Galanthay Theodore E.
Jorgenson Lisa K.
STMicroelectronics Inc.
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