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Patent US6445661 - Circuit, disk controller and method for calibrating a high precision delay ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn a circuit to provide a high precision delay signal, an oscillator generates oscillator pulses, each with an oscillator period. A counter, in response to an enable signal, counts the oscillator pulses and outputs a count signal. The enable signal is a reference clock signal having a reference-clock...http://www.google.com/patents/US6445661?utm_source=gb-gplus-sharePatent US6445661 - Circuit, disk controller and method for calibrating a high precision delay of an input signalAdvanced Patent SearchPublication numberUS6445661 B1Publication typeGrantApplication numberUS 09/372,373Publication dateSep 3, 2002Filing dateAug 11, 1999Priority dateAug 11, 1999Fee statusPaidPublication number09372373, 372373, US 6445661 B1, US 6445661B1, US-B1-6445661, US6445661 B1, US6445661B1InventorsEric Shengquan WuOriginal AssigneeOak Technology, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (16), Non-Patent Citations (34), Referenced by (13), Classifications (14), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetCircuit, disk controller and method for calibrating a high precision delay of an input signal
Tro=2�Nro�Td (1)
Tenb=��Tref=Ncount1�Tro (2)
By substitution, combining relationships one and two, relationship three below represents the amount of delay of the ring oscillator delay blocks 92-96. Td = Tref 4 � Ncount1 � Nro ( 3 ) Rewriting relationship three, the reference clock period is represented in relationship four below:
Tref=4�Ncount1�Nro�Td (4)
Therefore, combining relationships six and seven with relationship five yields the following relationship: T = Tref 128 = ( 4 � Ncount1 � Nro ) 128 � Td ( 8 ) Choosing the number of ring oscillator delay blocks Nro to be equal to sixteen, results in the following relationship: T = Tref 128 = ( Ncount1 ) 2 � Td ( 9 ) Relationship nine implies that (Ncount1/2) delay generator delay cells will provide a delay of T. In particular, for a system clock operating at 34 MHz, the period of the system clock, TSYSTEM will be equal to approximately 28 nanoseconds (ns), and the desired delay T will be equal to approximately 0.9 ns. For example, the delay generator delay cells provide a delay of approximately 0.11 nanoseconds and eight delay generator delay cells provide the desired delay when Ncount1 is equal to sixteen.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4737670 *Nov 9, 1984Apr 12, 1988Lsi Logic CorporationDelay control circuitUS4845390 *Jan 11, 1988Jul 4, 1989Lsi Logic CorporationDelay control circuitUS5216657 *Sep 3, 1992Jun 1, 1993Matsushita Electric Industrial Co., Ltd.Method and apparatus for timing variable optical information recordingUS5220546Sep 28, 1990Jun 15, 1993International Business Machines CorporationOperating optical disk drives including calibrating a tracking error signalUS5237554 *Dec 19, 1990Aug 17, 1993Sony CorporationApparatus for generating clock signals for data reproductionUS5272687 *Jan 22, 1992Dec 21, 1993Kabushiki Kaisha KenwoodEFM signal compensation circuitryUS5535327Jul 21, 1995Jul 9, 1996Oak Technology, Inc.Method and apparatus for communicating formatted data from a mass storage device to a host computerUS5559458 *May 11, 1995Sep 24, 1996Lucent Technologies Inc.Reset circuit for a pipelined signal processorUS5581715Jun 22, 1994Dec 3, 1996Oak Technologies, Inc.IDE/ATA CD drive controller having a digital signal processor interface, dynamic random access memory, data error detection and correction, and a host interfaceUS5870363Oct 25, 1996Feb 9, 1999Oak Technology, Inc.Optical disk motor servo and method for closed loop speed controlUS5986830 *Jul 30, 1997Nov 16, 1999Cirrus Logic, Inc.Read/write channel write precompensation system and method using one or more delay clocksUS6025745 *Jun 24, 1997Feb 15, 2000Digital Equipment CorporationAuto-calibrating digital delay circuitUS6064244 *Mar 7, 1997May 16, 2000Fujitsu LimitedPhase-locked loop circuit permitting reduction of circuit sizeUS6169438Sep 20, 1999Jan 2, 2001Oak Technology, Inc.Circuit and method for selectively delaying electrical signalsUS6194937 *Oct 6, 1998Feb 27, 2001Nec CorporationSynchronous delay circuit systemEP0687064A1 *May 19, 1995Dec 13, 1995Quantum CorporationFrequency-adjustable ring oscillator* Cited by examinerNon-Patent CitationsReference1"Audio Compact Disk-An Introduction", by Professor Kelin J. Kuhn, http://www.ee.washington.edu/conselec/CE/kuhn/cdaudio/95x6.htm, pp. 1-7 (May 12, 1999).2"CD- The Inside Story-Part 2- The Disc", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd2.html, (Dec. 2, 1996).3"CD-The Inside Story", by Glen Baddleley, http://werple.net.au/~gnb/mac-cdis/index.html, (Jul. 1, 1998).4"CD-The Inside Story-Part 1-General Principles", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd.1.html, (Dec. 2, 1996).5"CD-The Inside Story-Part 3- Data Format", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd3.html, pp. 1-2 (Dec. 2, 1996).6"CD-The Inside Story-Part 4- Sub-code", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd4.html, pp. 1-2 (Dec. 2, 1996).7"CD-The Inside Story-Part 5- Laser Tracking", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd5.html, pp. 1-4 (Dec. 2, 1996).8"CD-The Inside Story-Part 7- Digital to Analog Conversion", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd7.html, pp. 1-4 (Dec. 2, 1996).9"CD-The Inside Story-Part 8- Over-sampling and Filtering", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd8.html, pp. 1-4 (Dec. 2, 1996).10"CD-The Inside Story-Part 9-Mythology", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cd9.html, pp. 1-2 (Dec. 2, 1996).11"CD-The Inside Story-Postscript & References", by Glenn Baddeley, http://werple.net.au/~gnb/mac-cdis/cdps.html, pp. 1-2 (Feb. 13, 1998).12"Compact Disc Pickup Designs", by Cho Leung Chan, http://www.ee.washington.edu/conselec/W94/cho/chocd.htm, pp. 1-6 (May 12, 1999).13"GIF Image 669x459 pixels", http://www.ee.washington.edu/conselec/W94/cho/cho03.gif, , (May 12, 1999).14"GIF Image", htt://www.oaktech.com/images/975.gif (Mar. 12, 1999).15"GIF Image", http://www.oaktech.com/images/912blok.gif, (Mar. 12, 1999).16"OTI-912: IDE CD-ROM Controller", http://www.oaktech.com/briefs/912.htm, pp. 1-2 (3/97).17"OTI-975: IDE CD Recordable/ReWritable Controller", http://www.oaktech.com/briefs/975.htm, pp. 1-2 (Mar. 12, 1999).18"OTI-9780 Product Brief: Technical Specifications", http://www.oaktech.com/briefs/978tech.htm, pp. 1-2 (Mar. 12, 1999).19"OTI-9780: Preliminary Product Brief", http://www.oaktech.com/briefs/9780.htm, pp. 1-2 (7/98).20"Philips Consumer Electronics-Compact Disk: Nothing is Impossible", http://www-us.sv.philips.com/newtech/cd.html, pp. 1-26 (May 12, 1999).21"The Compact Disk Handbook", 2nd edition, by Ken C. Pohlmann, pp. 86-89 (1992).22"Audio Compact Disk-An Introduction", by Professor Kelin J. Kuhn, http://www.ee.washington.edu/conselec/CE/kuhn/cdaudio/95�6.htm, pp. 1-7 (May 12, 1999).23"CD- The Inside Story-Part 2- The Disc", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd2.html, (Dec. 2, 1996).24"CD-The Inside Story", by Glen Baddleley, http://werple.net.au/�gnb/mac-cdis/index.html, (Jul. 1, 1998).25"CD-The Inside Story-Part 1�General Principles", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd.1.html, (Dec. 2, 1996).26"CD-The Inside Story-Part 3- Data Format", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd3.html, pp. 1-2 (Dec. 2, 1996).27"CD-The Inside Story-Part 4- Sub-code", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd4.html, pp. 1-2 (Dec. 2, 1996).28"CD-The Inside Story-Part 5- Laser Tracking", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd5.html, pp. 1-4 (Dec. 2, 1996).29"CD-The Inside Story-Part 7- Digital to Analog Conversion", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd7.html, pp. 1-4 (Dec. 2, 1996).30"CD-The Inside Story-Part 8- Over-sampling and Filtering", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd8.html, pp. 1-4 (Dec. 2, 1996).31"CD-The Inside Story-Part 9-Mythology", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cd9.html, pp. 1-2 (Dec. 2, 1996).32"CD-The Inside Story-Postscript & References", by Glenn Baddeley, http://werple.net.au/�gnb/mac-cdis/cdps.html, pp. 1-2 (Feb. 13, 1998).33"GIF Image 669�459 pixels", http://www.ee.washington.edu/conselec/W94/cho/cho03.gif, , (May 12, 1999).34Runout Calibration for Disc Drive System, U.S. patent application, Ser. #08/834,607, (Filed Apr. 14, 1997).Referenced byCiting PatentFiling datePublication dateApplicantTitleUS6566838 *Mar 20, 2001May 20, 2003Stmicroelectronics S.R.L.Fully digital control and drive combination IC with on-board DSP for disk mass storage deviceUS6657936 *Nov 22, 2002Dec 2, 2003Calimetrics, Inc.Programmable write signal generatorUS6697308 *Apr 28, 2000Feb 24, 2004Mosel Vitelic CorporationMethod and system for providing timing adjustment to perform reliable optical recording at high speedsUS6775217 *May 18, 2000Aug 10, 2004Cirrus Logic, Inc.Multi-stage ring oscillator for providing stable delays on EFM data pulses for recording CD-R and CD-RW mediumUS6819157 *Nov 15, 2001Nov 16, 2004Lucent Technologies Inc.Delay compensation circuitUS7049874Oct 30, 2003May 23, 2006Mediatek Inc.Digital delaying deviceUS7102976 *Jan 29, 2003Sep 5, 2006Samsung Electronics Co., Ltd.Apparatus and method for generating write pulse for optical storage medium using ring oscillatorUS7148733 *Jul 19, 2005Dec 12, 2006Tektronix International Sales GmbhVariable delay circuit with faster delay data updateUS7342518Jan 20, 2004Mar 11, 2008Freescale Semiconductor, Inc.Digital rate converterUS7457213Jun 17, 2004Nov 25, 2008Mediatak Inc.Write signal generator with delay calibrationUS7471599 *Jul 1, 2004Dec 30, 2008Mediatek Inc.Write signal control circuit in an optical disk driveUS7705600Feb 12, 2007Apr 27, 2010Cypress Semiconductor CorporationVoltage stress testing of core blocks and regulator transistorsUS7961582 *Jun 15, 2005Jun 14, 2011Hitachi, Ltd.Optical disk recording apparatus, laser diode driving apparatus and recording signal generating apparatus* Cited by examinerClassifications U.S. Classification369/59.2, G9B/7.016, 327/278International ClassificationH03K5/00, G11B7/0045, G11B7/00, H03K5/135, G11B20/10Cooperative ClassificationH03K5/135, G11B7/00456, G11B20/10, H03K2005/00078European ClassificationH03K5/135, G11B7/0045SLegal EventsDateCodeEventDescriptionMar 3, 2014FPAYFee paymentYear of fee payment: 12Jan 18, 2012ASAssignmentOwner name: CSR TECHNOLOGY INC., CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZORAN CORPORATION;REEL/FRAME:027550/0695Effective date: 20120101Mar 3, 2010FPAYFee paymentYear of fee payment: 8Jan 24, 2006FPAYFee paymentYear of fee payment: 4Oct 19, 2004ASAssignmentOwner name: ZORAN CORPORATION, CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OAK TECHNOLOGY, INC.;REEL/FRAME:015259/0994Effective date: 20041012Owner name: ZORAN CORPORATION 1390 KIFER ROADSUNNYVALE, CALIFOFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OAK TECHNOLOGY, INC. /AR;REEL/FRAME:015259/0994Aug 11, 1999ASAssignmentOwner name: OAK TECHNOLOGY, INC., CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WU, ERIC SHENGQUAN;REEL/FRAME:010167/0306Effective date: 19990806RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services