Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of the amplifier
Patent
1998-01-23
1999-11-02
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of the amplifier
360 46, 360 61, 360 62, G11B 502
Patent
active
059781645
ABSTRACT:
A signal reproducing circuit includes a magneto-resistive effect head having one end thereof coupled to a first power supply line, for reproducing data recorded on a magnetic recording medium in a read operation. A first constant current source is coupled between another end of the head and a second power supply line, for supplying the head with a sense current in the read operation. First and second transistors have collectors thereof coupled to the first power supply line, and are responsive to voltage signals obtained from both ends of the head, respectively. Second and third constant current sources are coupled between each emitter of the first and second transistors and the second power supply line, respectively, for supplying the first and second transistors with a predetermined constant current in the read operation. A capacitor is connected between each emitter of the first and second transistors. A control circuit responsive to a read/write control signal controls respective ON/OFF timings of the first to third constant current sources. The control means controls at least one signal reproducing circuit portion corresponding to nonselected heads to be brought to a read state when a signal reproducing circuit portion corresponding to a selected head is in a write state.
REFERENCES:
patent: 3665485 (1972-05-01), Pear, Jr.
patent: 4063293 (1977-12-01), Perahia
patent: 4597019 (1986-06-01), Nishimoto et al.
patent: 5307212 (1994-04-01), Tagiri
patent: 5323278 (1994-06-01), Contreras et al.
patent: 5416645 (1995-05-01), Fukuyama
patent: 5430584 (1995-07-01), Petersen
patent: 5488518 (1996-01-01), Shier
IBM Technical Disclosure Bulletin, vol. 33, No. 4, Sep. 1990 "Recovery Circuit for Magneto-Resistive Head Switching".
Shibasaki Hidekazu
Ueno Hiroaki
Davidson Dan I.
Fujitsu Limited
Sniezek Andrew L.
LandOfFree
Signal reproducing circuit adapted for head utilizing magneto-re does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal reproducing circuit adapted for head utilizing magneto-re, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal reproducing circuit adapted for head utilizing magneto-re will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2143751