Disk drive read circuit comprising an AC coupled sense amplifier for amplifying a read signal
AssigneeWestern Digital Technologies, Inc.
InventorsMichael L. Mallary, Yiao-Tee Hsia, William D. Huber
Life of this patent
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Abstract
A disk drive read circuit is disclosed comprising a read element for generating a read signal, and a sense amplifier comprising an input terminal coupled through a first capacitor to the read element and an output terminal coupled through a second capacitor to a transmission line, wherein the sense amplifier is for amplifying the read signal.
Claims30
A disk drive read circuit comprising:
- a read element for generating a read signal;
- and
- a sense amplifier comprising an input terminal coupled through a first capacitor to the read element and an output terminal coupled through a second capacitor to a first end of a transmission line, wherein:
- a second end of the transmission line is coupled to a preamplifier;
- and
- the sense amplifier is for amplifying the read signal,
- wherein the transmission line provides at least one of a bias signal to the read element and power to the sense amplifier.
A method of manufacturing a disk drive read circuit comprising a read element for generating a read signal, the method comprising:
- coupling an input terminal of a sense amplifier through a first capacitor to the read element;
- and
- coupling an output terminal of the sense amplifier through a second capacitor to a first end of a transmission line, wherein:
- a second end of the transmission line is coupled to a preamplifier;
- and
- the sense amplifier is for amplifying the read signal,
- wherein the transmission line provides at least one of a bias signal to the read element and power to the sense amplifier.
A disk drive read circuit comprising:
- a read element for generating a read signal;
- and
- a sense amplifier comprising an input terminal coupled through a first capacitor to the read element and an output terminal coupled through a second capacitor to a first end of a transmission line, wherein:
- a second end of the transmission line is coupled to a preamplifier;
- the sense amplifier is for amplifying the read signal;
- and
- the second end of the transmission line is coupled to a bond pad of a slider, and the bond pad of the slider is coupled to a flex circuit.
A disk drive read circuit comprising:
- a read element for generating a read signal;
- and
- a sense amplifier comprising an input terminal coupled through a first capacitor to the read element and an output terminal coupled through a second capacitor to a first end of a transmission line, wherein:
- a second end of the transmission line is coupled to a preamplifier;
- the sense amplifier is for amplifying the read signal;
- the sense amplifier is coupled to a slider through a first flex circuit, wherein the slider comprises the read element;
- and
- the sense amplifier is coupled to a preamplifier through a second flex circuit.
A method of manufacturing a disk drive read circuit comprising a read element for generating a read signal, the method comprising:
- coupling an input terminal of a sense amplifier through a first capacitor to the read element;
- and
- coupling an output terminal of the sense amplifier through a second capacitor to a first end of a transmission line, wherein:
- a second end of the transmission line is coupled to a preamplifier;
- the sense amplifier is for amplifying the read signal;
- and
- the second end of the transmission line is coupled to a bond pad of a slider, and the bond pad of the slider is coupled to a flex circuit.
A method of manufacturing a disk drive read circuit comprising a read element for generating a read signal, the method comprising:
- coupling an input terminal of a sense amplifier through a first capacitor to the read element;
- and
- coupling an output terminal of the sense amplifier through a second capacitor to a first end of a transmission line, wherein:
- a second end of the transmission line is coupled to a preamplifier;
- and
- the sense amplifier is for amplifying the read signal,
- coupling a slider comprising the read element to the sense amplifier through a first flex circuit;
- and
- coupling the sense amplifier to a preamplifier through a second flex circuit.
Dependencies are inferred from the claim text.