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Class Information
Number: 360/67
Name: Dynamic magnetic information storage or retrieval > General recording or reproducing > Specifics of the amplifier
Description: Subject matter including specific circuitry or techniques for amplifying an information signal.










Sub-classes under this class:

Class Number Class Name Patents
360/68 Recording amplifier 427


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
8711502 Preamplifier-to-channel communication in a storage device Apr. 29, 2014
8705196 Storage device having degauss circuitry with separate control of degauss signal steady state and overshoot portions Apr. 22, 2014
8687300 Communication path latency measurement using capacitive coupling Apr. 1, 2014
8643973 Method and apparatus for reflection cancellation Feb. 4, 2014
8634152 Systems and methods for throughput enhanced data detection in a data processing circuit Jan. 21, 2014
8619381 System and method for improving head positioning Dec. 31, 2013
8619382 High speed, low power write current switching scheme for HDD preamplifier Dec. 31, 2013
8589774 Averaging signals to improve signal interpretation Nov. 19, 2013
8477447 Asymmetry correction in read signal Jul. 2, 2013
8462457 Electrostatic discharge protection circuit for magneto-resistive read elements Jun. 11, 2013
8456774 Compensating asymmetries of signals using piece-wise linear approximation Jun. 4, 2013
8411383 Systems and methods for high order asymmetry correction Apr. 2, 2013
8390948 Disk drive employing a preamp comprising read/write pass throughs for cascading integrated circuits Mar. 5, 2013
8385016 Asymmetric correction circuit Feb. 26, 2013
8279549 System and method for setting bias for MR head Oct. 2, 2012
8233229 Systems and methods for reduction of cross coupling in proximate signal lines Jul. 31, 2012
8212503 Driving circuit for voice coil motor and method thereof Jul. 3, 2012
8188731 Control system including a control circuit and sensor, and method for operation of the control system May. 29, 2012
8169726 Disk file preamplifier frequency-response and time delay compensation May. 1, 2012
8164845 Method and apparatus for asymmetry correction in magnetic recording channels Apr. 24, 2012
8161361 Averaging signals to improve signal interpretation Apr. 17, 2012
8149531 Electrostatic discharge protection circuit for magneto-resistive read elements Apr. 3, 2012
8139305 Systems and methods for timing and gain acquisition Mar. 20, 2012
8130462 Decoupling magneto-resistive asymmetry and offset loops Mar. 6, 2012
8107181 Apparatus, system, and method for measuring magnetoresistive head resistance Jan. 31, 2012
8107182 Systems and methods for accessing read channel registers using commands on data lines Jan. 31, 2012
8093845 Controller and MCU chip for controlling 3-phase brushless DC motor Jan. 10, 2012
7986479 Circuit for correcting signal distortions Jul. 26, 2011
7982991 Method and apparatus for determining set value of write current of magnetic head Jul. 19, 2011
7982998 Communications channel with programmable coupling Jul. 19, 2011
7961418 Resistivity sense bias circuits and methods of operating the same Jun. 14, 2011
7940488 Storage device and gain adjusting device May. 10, 2011
7933086 Power supply voltage supply circuit and disk apparatus Apr. 26, 2011
7929241 Signal conversion system and method Apr. 19, 2011
7889452 Hard disk drive preamplifier timers and methods to calibrate hard disk drive preamplifier timers Feb. 15, 2011
7885031 Asymmetry correction in read signal Feb. 8, 2011
7881001 Method and system for canceling feedback current in an amplifier system Feb. 1, 2011
7880989 Write driver circuit for magnetic data storage systems Feb. 1, 2011
7881000 Method of setting up a pre-amplifier for hard disk drive and hard disk drive incorporating the same Feb. 1, 2011
7876520 Programmable high pass amplifier for perpendicular recording systems Jan. 25, 2011
7872825 Data storage drive with reduced power consumption Jan. 18, 2011
7869153 Self servo write tune feature for preamps Jan. 11, 2011
7864477 Circuits, architectures, apparatuses, systems, algorithms and methods and software for automatic gain calibration of a burst signal stream Jan. 4, 2011
7859781 Head IC that adjusts the amplitude level of a read signal of a head Dec. 28, 2010
7855849 Methods and apparatus for temperature compensation for hard disk drive write overshoot current Dec. 21, 2010
7852584 Head IC, read circuit, and media storage device Dec. 14, 2010
7852591 Electrostatic discharge protection circuit for magneto-resistive read elements Dec. 14, 2010
7848044 VCM driver and PWM amplifier Dec. 7, 2010
7843659 Head IC, read circuit, media storage device and amplifier gain adjustment method for head IC Nov. 30, 2010
7839593 Magneto-resistive biasing methods and systems Nov. 23, 2010

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