Matches 1 - 19 out of 19


Match Document Document Title
US20090268332 STORAGE DEVICE AND GAIN ADJUSTING DEVICE  
An amplifier amplifies, according to a first gain value, a first input signal acquired by reproducing first information from first areas having the first information recorded therein area by area...
US20060193071 HIDID PreAmp-to-host interface with much reduced I/O lines  
The present invention achieves technical advantages as a Preamp enabled to use different functional blocks inside the Preamp only during their own “active” modes. When a block is “inactive”, its...
US20070236819 Hard Disk Drive Preamplifier with Reduced Pin Count  
A disk drive controller including a preamplifier and a controller is disclosed, in which communications between the controller and the preamplifier are carried out over at least some shared...
US20060256463 Gain controller for a gain loop of a read channel and related gain loops, read channels, systems, and methods  
A gain controller for a gain loop of a read channel includes a comparator circuit, an accumulator circuit, and a function circuit. The comparator circuit determines an error between an actual...
US20050254158 ESD protection for differential mode magnetic transducer  
Use of a depletion mode MOSFET to protect differential terminals of a disk drive read head transducer from an electrostatic discharge event, wherein MOSFET source and drain terminals are connected...
US20060072231 Current mirrors having fast turn-on time  
A current mirror circuit providing a fast turn on time. A node within the circuit is held at a first voltage when the current mirror is off to permit the node voltage to quickly reach a necessary...
US20110002062 ANALOG MULTIPLEXER CIRCUITS AND METHODS  
A sample and hold circuit is disclosed that provides longer hold times. An analog multiplexer circuit is also disclosed that exhibits low switch leakage. The analog multiplexer circuit comprises a...
US20080123212 Head IC, read circuit and medium storage device  
A head IC adjusts an amplitude level of a read signal of a head to adjust dispersion of the output characteristic of the head and to adjust the read signal within the input dynamic range of the...
US20110109984 WRITING AND READING MULTI-LAYER CONTINUOUS MAGNETIC RECORDING MEDIA, WITH MORE THAN TWO RECORDING LAYERS  
A method and apparatus for writing magnetization states in magnetic layers of a multi-layer continuous magnetic recording medium with more than two recording levels and a method and apparatus for...
US20150077879 Disk Drive with Preamplifier for Multiple Readers in a Slider with a Common Return Signal  
Disk drive embodiments with common lead connections in the slider, suspension, and preamplifier are described. The arm electronics IC includes a preamplifier with single-ended input from the set...
US20090034112 METHODS AND APPARATUS TO VARY INPUT IMPEDANCE OF A HARD DISK DRIVE READ PREAMPLIFIER  
Methods and apparatus to vary the input impedance of a hard disk read preamplifier are disclosed. A disclosed method amplifies a read signal from a hard disk read head based on the impedance...
US20070230004 Read channel/hard disk controller interface including power-on reset circuit  
A system and method for providing an interface an interface between a read channel and a disk controller. The interface includes a plurality of differential pair signal lines operable to...
US20090141388 MAGNETIC DISK APPARATUS  
A preamplifier receives a servo gate signal indicating whether magnetic information read out from a disk by a head is servo data for positioning-use or user data stored in a user area available...
US20140063639 PRE-AMPLIFIER OUTPUT STAGE WITH INTEGRATED TEST BUFFER  
Disk drive pre-amplifier output stage circuitry is presented including a high pass input filter for removing DC offsets from differential read data signals and providing an input to AB drivers of...
US20070206306 Magnetic head drive circuit  
A recording head drive circuit drives a recording head that records information on a magnetic recording medium. A switching circuit is a H-bridge circuit which includes a plurality of transistors....
US20060066972 Read channel for simultaneous multiple bit data transfers  
A system is provided that has the ability to perform simultaneous parallel read and write operations with a plurality of transducing heads that transduce data with a storage medium. The system...
US20110102931 HARD DISC DEVICE CONTROL CIRCUIT AND HARD DISC DEVICE  
A head of a hard disc device is retracted to a predetermined position by operating a VCM (Voice Coil Motor) driver. Trouble in a hard disc is detected and retraction is performed even if a short...
US20090052079 Magnetic head slider fabrication method, preamplifier and magnetic disk drive  
Embodiments of the present invention set the resistance value and resistance change of a magnetoresistive element as the comparison criteria of a tester without use of an actual magnetic head...
US20100110578 SIGNAL AMPLIFIER AND STORAGE DEVICE  
According to one embodiment, a signal amplifier amplifies a read signal read from a storage medium by a head, and includes an amplifier, a detector, and an impedance controller. The amplifier...

Matches 1 - 19 out of 19