DF

David A. Freitas

IBM: 13 patents #8,581 of 70,183Top 15%
AM AMD: 2 patents #3,994 of 9,279Top 45%
HG HGST: 1 patents #1,032 of 1,677Top 65%
Overall (All Time): #294,597 of 4,157,543Top 8%
16
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
11190199 Asynchronous successive approximation register (SAR) analog-to-digital converter (ADC) timing adjustment based on output statistics Kevin Zheng, Hsung Jai Im 2021-11-30
9876656 Differential feedback equalizer and method of implementing a differential feedback equalizer 2018-01-23
7844843 Implementing power savings in HSS clock-gating circuit 2010-11-30
7332932 Serial link receiver with wide input voltage range and tolerance to high power voltage supply Hayden C. Cranford, Jr., Westerfield J. Ficken, Joseph M. Stevens 2008-02-19
6954321 Method and apparatus for improved read-to-write transition time for a magneto-resistive head Kevin Vannorsdel 2005-10-11
6525896 Method and circuitry for high voltage application with MOSFET technology Paul W. Chung, Kevin Vannorsdel 2003-02-25
6377412 Method and apparatus for improving baseline recovery of an MR head using a programmable recovery time constant 2002-04-23
6356113 Recording channel with voltage-type write driver for use with transmission-line interconnect John Contreras, Klaassen Berend Klaassen 2002-03-12
6130795 Method and apparatus to sense and report connection integrity of a differential ECL transmission line having proper parallel termination Kevin Vannorsdel 2000-10-10
6038090 Method and apparatus for improving baseline recovery of an MR head using a programmable recovery time constant 2000-03-14
5966263 Method and apparatus to increase head/AE select robustness for a system using multiple head servo write Kevin Vannorsdel, Mantle Man-Hon Yu 1999-10-12
5801896 Method and apparatus for servo pulse detection with high AC coupling and large pulse asymmetry 1998-09-01
5793556 High speed PES demodulator 1998-08-11
5617536 Method and apparatus for servo control with error detection of gray (pennington) code used for servo track ID Louis J. Serrano, Mantle Man-Hon Yu 1997-04-01
5602692 Sampled position error signal demodulation system for banded data disk drives Shih-Ming Shih 1997-02-11
5117199 Fully differential follower using operational amplifier Chorng-Kuang Wang, Roomy Khan 1992-05-26