LexDanaLexDanabeta
Inventor

Michael Madden

Inventor
Mountain View, CA, US

Overview

65→
Patents
2004–2019
Patent span
Physics
Primary field (CPC G)

Patents· 65 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer86%
H03MCoding7%
H04LTransmission of digital information, e.g. telegraphic communication4%
G06FElectric digital data processing3%
PatentTitleYear
10,510,367Method and apparatus for processing multiple servo channels in magnetic recording devices201910,497,390Decision-free timing disturbance cancellation caused by HAMR laser power variation20199,583,137'Methods of demodulating a servo position error signal on patterned media'20179,418,690'Repeated runout (RRO) zero phase start (ZPS)'20169,311,937'Systems and methods for calibrating read and write operations in two dimensional magnetic recording'20169,202,515'Apparatus and method for adjusting a phase of a data clock signal using a predetermined bit pattern'20159,117,472'Processing a data signal with an embedded position signal'20159,077,501'Systems and methods for detecting cycle slip and/or framing error'20159,053,742'Repeated runout (RRO) zero phase start (ZPS)'20159,037,955'Viterbi decoder method and apparatus with RI detector in servo channel'20159,019,645'Applying digital frequency offset to timing loop'20159,019,638'Systems and methods for performing timing acquisition in a read/write channel module'20158,964,323'System and method for detecting and correcting shift in a DC level of an input signal'20158,947,823'Method and apparatus for detecting drive head touchdown'20158,947,810'Bit-locked interface for magnetic recording'20158,922,924'ACQ in the presence of baseline pop'20148,879,185'Disk synchronous write architecture for bit-patterned recording'20148,873,176'Non-linear transition shift identification and compensation'20148,867,159'Method and read module for adjusting a frequency at which a converter samples a read signal based on movement of center of a rotating storage medium'20148,824,074'Hybrid defect detection for recording channels'20148,810,938'Systems and methods for performing timing acquisition on an expected preamble of a read signal'20148,804,259'Systems and methods for revising data in a signal read from a storage medium according to a calculated gain'20148,773,792'Systems and methods for inter-track interference cancellation in magnetic recording channels'20148,730,605'Write zero phase start for phase synchronization in bit patterned recording'20148,730,609'DC shift detection and correction'20148,711,510'Harmonic sensor'20148,707,147'Viterbi decoder method and apparatus with RI detector in servo channel'20148,693,118'Timing acquisition robust to inter-track-interference'20148,693,124'Bit-locked interface for magnetic recording'20148,649,120'Systems and methods for gain compensation and re-timing in magnetic recording channels'20148,625,218'ACQ in the presence of baseline pop'20148,593,747'Hybrid defect detection for recording channels'20138,565,353'Unfolded decision-directed loop, architectures, apparatuses and systems including the same, and methods, algorithms and software for reducing latency in decision-directed loops'20138,537,482'Systems and methods for inter-track interference cancellation in magnetic recording channels'20138,537,483'Method and apparatus for adjusting a sampling frequency of a data signal read from a storage medium'20138,473,830'Viterbi decoder method and apparatus with RI detector in servo channel'20138,422,160'Harmonic sensor'20138,405,928'Analog techniques to decode signals extracted from computer-readable storage media'20138,395,858'Methods and apparatus for performing interpolated timing recovery'20138,358,480'Non-linear transition shift identification and compensation'20138,339,720'Hybrid defect detection for recording channels'20128,339,722'Methods of demodulating a servo positon error signal on patterned media'20128,289,642'Digital techniques to decode signals extracted from computer-readable storage media'20128,279,546'Systems and methods for sync mark detection using correlation'20128,261,172'Viterbi decoder method and apparatus with RI detector in servo channel'20128,165,247'Unfolded decision-directed loop, architectures, apparatuses and systems including the same, and methods, algorithms and software for reducing latency in decision-directed loops'20128,164,846'Hybrid defect detection for recording channels'20128,154,820'Harmonic sensor'20128,154,822'Analog techniques to decode signals extracted from computer-readable storage media'20128,049,983'Methods and apparatus for performing interpolated timing recovery'20118,051,365'Viterbi decoder method and apparatus with RI detector in servo channel detector in servo channel'20118,027,114'Spiral servo detection with phase-locked loop (PLL)'20118,004,784'Predictive methods and systems for sampling data read from a rotating storage medium'20117,986,487'Harmonic sensor'20117,982,990'Digital techniques to decode signals extracted from computer-readable storage media'20117,974,032'Non-linear transition shift identification and compensation'20117,974,034'Systems and methods for sync mark detection using correlation'20117,933,092'Method and apparatus for estimating a position of a head in a disk drive'20117,764,458'Up-sampled filtering for servo demodulation'20107,715,135'Methods, circuits, apparatus, and systems for read channel synchronization and/or fly height measurement'20107,583,469'Up-sampled filtering for servo demodulation'20097,538,967'Method and apparatus for estimating a position of a head in a disk drive'20097,158,333'Up-sampled filtering for servo demodulation'20076,993,097'Demodulation method and demodulator for CPFSK-modulated signals'20066,785,348'Demodulator and method for demodulating CPFSK-modulated signals using a linear approximation of the CPFSK signal'2004

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2004–2019Based in Mountain View, CA, US· patent location history
2007–2019Patents assigned to MARVELL INT LTD (62)· patent assignee history
2012–2014Patents assigned to MADDEN MICHAEL (22)· patent assignee history
2012–2013Patents assigned to WU ZINING (13)· patent assignee history
2012–2013Patents assigned to YU ZAIHE (5)· patent assignee history
2013–2014Patents assigned to BURD GREGORY (7)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MARVELL INT LTD622007–2019
MADDEN MICHAELself222012–2014
WU ZINING132012–2013
BURD GREGORY72013–2014
YU ZAIHE52012–2013
Locations
LocationPatentsSpan
Mountain View, California, US652004–2019