Inventor
SCHELL DAVID L
US34 patents
⚠️ This page may combine multiple inventors who share the name “SCHELL DAVID L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DISCOVISION ASS
20 patentsUS5875158AFeb 23, 1999
Servo control system for information storage device
DISCOVISION ASS121 citations99
US6122232ASep 19, 2000
Isolation apparatus for use in disc drive system to mitigate effects of undesired mechanical forces and disc drive system including same
DISCOVISION ASS88 citations98
US5729511AMar 17, 1998
Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
DISCOVISION ASS124 citations98
US6087644AJul 11, 2000
Focus capture for optical disc system including detection of quad sum signal to close focus
DISCOVISION ASS73 citations97
US6278665B1Aug 21, 2001
Optical disc system including current monitoring circuit assembly having controller with improved optics module and laser driver and method for operating same
DISCOVISION ASS22 citations96
US5878015AMar 2, 1999
Laser driver for controlling electrical current passed to a laser in an optical disc system
DISCOVISION ASS47 citations96
US5796703AAug 18, 1998
Apparatus for controlling an electrical current passed to a writing device in an optical storage system
DISCOVISION ASS23 citations96
US5748578AMay 5, 1998
Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same
DISCOVISION ASS70 citations96
US6266306B1Jul 24, 2001
Analog to digital converter and assembly for use in optical drive system to normalize servo error signals and multiplex reference voltage inputs and digital outputs
DISCOVISION ASS24 citations95
US6418097B1Jul 9, 2002
Analog to digital converter assembly for normalizing servo error signals and multiplexing reference voltage inputs and digital outputs and improved optical drive system including same
DISCOVISION ASS26 citations94
US6434087B1Aug 13, 2002
Optical disc system and method for controlling bias coil and light source to process information on a storage medium
DISCOVISION ASS41 citations93
US6317391B1Nov 13, 2001
Optical disc system having current monitoring circuit with improved bias coil assembly and controller for laser driver and method for operating same
DISCOVISION ASS17 citations93
US6069857AMay 30, 2000
Optical disc system having improved circuitry for performing blank sector check on readable disc
DISCOVISION ASS39 citations93
US6243336B1Jun 5, 2001
Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal and focus capture method for use in same
DISCOVISION ASS17 citations92
US5920539AJul 6, 1999
Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor
DISCOVISION ASS34 citations92
US6236625B1May 22, 2001
Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
DISCOVISION ASS20 citations84
US5828054AOct 27, 1998
Focusing method and system for focus capture and focus control in optical disc system including detection of Quad Sum signal to close focus
DISCOVISION ASS10 citations82
US6058081AMay 2, 2000
Optical drive system having servomotor operated relative to maximum quad sum signal
DISCOVISION ASS15 citations81
US6091684AJul 18, 2000
Optical disc system and method for changing the rotational rate of an information storage medium
DISCOVISION ASS14 citations74
US6034364AMar 7, 2000
Optical disc system including focus capture assembly with focus error signal circuit and method for operating same
DISCOVISION ASS5 citations74
LASER MAGNETIC STORAGE INT
6 patentsUS4779253AOct 18, 1988
Sampled servo for an optical disk drive
LASER MAGNETIC STORAGE INT27 citations92
US4907212AMar 6, 1990
Method and apparatus for calibrating an optical disk system
LASER MAGNETIC STORAGE INT44 citations90
US4855977AAug 8, 1989
Track seeking apparatus and method using sampled information
LASER MAGNETIC STORAGE INT20 citations82
US4864552ASep 5, 1989
Driving signal for coarse servo employing sampled offset signal
LASER MAGNETIC STORAGE INT12 citations74
US4718054AJan 5, 1988
Servo error write blanking circuit for an optical recording disk
LASER MAGNETIC STORAGE INT9 citations71
US4914645AApr 3, 1990
Optical disk tracking and seeking systems and specific track formats using servo areas
LASER MAGNETIC STORAGE INT14 citations70
LSI LOGIC CORP
5 patentsUS6986098B2Jan 10, 2006
Method of reducing miscorrections in a post-processor using column parity checks
LSI LOGIC CORP201 citations98
US6586968B1Jul 1, 2003
Programmable bit ordering for serial port
LSI LOGIC CORP22 citations92
US6566922B1May 20, 2003
Zero phase and frequency restart PLL
LSI LOGIC CORP15 citations83
US6233210B1May 15, 2001
Optical drive error tracking method and apparatus
LSI LOGIC CORP13 citations74
US6927932B1Aug 9, 2005
Filter for disk drive bi-phase servo demodulation
LSI LOGIC CORP4 citations62