High-efficiency adaptive DC/AC converter Number:7,417,382 from the United States Patent and Trademark Office (PTO) owispatent A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.<H efficiency, converter, High, efficiency, 7417382.html, Patent, pto, 7417382

Title: High-efficiency adaptive DC/AC converter

Abstract: A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

Patent Number: 7,417,382 Issued on 08/26/2008 to Lin

Inventors: Lin; Yung-Lin (Palo Alto, CA)
Assignee: O2Micro International Limited (Grand Cayman, KY)

Appl. No.: 10/935,629

Filed: September 7, 2004

Related U.S. Patent Documents


Application Number	Filing Date	Patent Number	Issue Date
10776417	Feb., 2004	6804129
10132016	Apr., 2002
09850222	May., 2001	6396722
09437081	Nov., 1999	6259615
60145118	Jul., 1999

Current U.S. Class: 315/225 ; 315/307; 363/98

Current International Class: H02M 3/335 (20060101)

Field of Search: 363/17,97,98,41,37,16,132,134,124,56,56.2 315/307,225,160,109,247,169,209,244

References Cited [Referenced By]

U.S. Patent Documents


3921058	November 1975	Tanaka et al.
4277728	July 1981	Stevens
4461980	July 1984	Nilssen
4461990	July 1984	Bloomer
4504895	March 1985	Steigerwald
4535399	August 1985	Szepesi
4541041	September 1985	Park et al.
4592087	May 1986	Killion
4626979	December 1986	JaQuay
4672258	June 1987	Konishi
4672528	June 1987	Park et al.
4682084	July 1987	Kuhnel et al.
4689819	August 1987	Killion
4727469	February 1988	Kammiller
4794506	December 1988	Hino et al.
4814962	March 1989	Magalhaes et al.
4833584	May 1989	Divan
4855888	August 1989	Henze et al.
4859912	August 1989	Lippmann et al.
4859921	August 1989	Lippmann et al.
4860189	August 1989	Hitchcock
4864483	September 1989	Divan
4870327	September 1989	Jorgensen
4904906	February 1990	Atherton et al.
4912622	March 1990	Steigerwald et al.
4935857	June 1990	Nguyen et al.
4939429	July 1990	Cavazos et al.
4952849	August 1990	Fellows et al.
4953068	August 1990	Henze
4958108	September 1990	Jorgensen
4967332	October 1990	Claydon et al.
4983887	January 1991	Nilssen
4988920	January 1991	Hoeksma
4992919	February 1991	Lee et al.
5012058	April 1991	Smith
5017800	May 1991	Divan
5027263	June 1991	Harada et al.
5027264	June 1991	Dedoncker et al.
5051661	September 1991	Lee
5105127	April 1992	Lavaud et al.
5113334	May 1992	Tuson et al.
5132888	July 1992	Lo et al.
5132889	July 1992	Hitchcock et al.
5157592	October 1992	Walters
5166579	November 1992	Kawabata et al.
5198969	March 1993	Redl et al.
5208740	May 1993	Ehsani
5231563	July 1993	Jitaru
5235501	August 1993	Stuart et al.
5239293	August 1993	Barbier
5268830	December 1993	Loftus, Jr.
5270620	December 1993	Basch et al.
5285372	February 1994	Huynh et al.
5287040	February 1994	Lestician
5291382	March 1994	Cohen
5305191	April 1994	Loftus, Jr.
5311104	May 1994	Antle
5315498	May 1994	Berrios et al.
5363020	November 1994	Chen et al.
5384516	January 1995	Kawabata et al.
5402043	March 1995	Nilssen
5402329	March 1995	Wittenbreder, Jr.
5412557	May 1995	Lauw
5418703	May 1995	Hitchcock et al.
5420779	May 1995	Payne
5422546	June 1995	Nilssen
5430632	July 1995	Meszlenyi
5430641	July 1995	Kates
5438242	August 1995	Simpson
5448155	September 1995	Jutras
5448467	September 1995	Ferreira
5464836	November 1995	Camaggi et al.
5481160	January 1996	Nilssen
5481163	January 1996	Nakamura et al.
5486740	January 1996	Yamashita et al.
5495405	February 1996	Fujimura et al.
5510974	April 1996	Gu et al.
5514921	May 1996	Steigerwald
5519289	May 1996	Katyl et al.
5546300	August 1996	Lee et al.
5559688	September 1996	Pringle
5563777	October 1996	Miki et al.
5583402	December 1996	Moisin et al.
5606224	February 1997	Hua
5615093	March 1997	Nalbant
5619104	April 1997	Eunghwa
5619402	April 1997	Liu
5638260	June 1997	Bees
5646836	July 1997	Sadarnac et al.
5652479	July 1997	LoCascio et al.
5657220	August 1997	Yan
5669238	September 1997	Devers
5677602	October 1997	Paul et al.
5684683	November 1997	Divan et al.
5694007	December 1997	Chen
5712533	January 1998	Corti
5715155	February 1998	Shahani et al.
5719474	February 1998	Vitello
5719759	February 1998	Wagner et al.
5731652	March 1998	Shimada
5736842	April 1998	Jovanovic
5742495	April 1998	Barone
5742496	April 1998	Tsutsumi
5744915	April 1998	Nilssen
5748457	May 1998	Poon et al.
5764494	June 1998	Schutten et al.
5774346	June 1998	Poon et al.
5781418	July 1998	Chang et al.
5781419	July 1998	Kutkut et al.
5784266	July 1998	Chen
5796598	August 1998	Nowak et al.
5818172	October 1998	Lee
5834889	November 1998	Ge
5834904	November 1998	Takehara
5844378	December 1998	LoCascio et al.
5844540	December 1998	Terasaki
5854617	December 1998	Lee et al.
5856916	January 1999	Bonnet
5870298	February 1999	Hung
5875103	February 1999	Bhagwat et al.
5880940	March 1999	Poon
5886477	March 1999	Honbo et al.
5886884	March 1999	Baek et al.
5894412	April 1999	Faulk
5910709	June 1999	Stevanovic et al.
5917722	June 1999	Singh
5923129	July 1999	Henry
5930121	July 1999	Henry
5930122	July 1999	Moriguchi et al.
5932976	August 1999	Maheshwari et al.
5939830	August 1999	Praiswater
5946200	August 1999	Kim et al.
5949197	September 1999	Kastner
6002210	December 1999	Nilssen
6011360	January 2000	Gradzki et al.
6016052	January 2000	Vaughn
6051940	April 2000	Arun
6108215	August 2000	Kates et al.
6114814	September 2000	Shannon et al.
6151232	November 2000	Furuhashi et al.
6198234	March 2001	Henry
6259615	July 2001	Lin
6396722	May 2002	Lin
6501234	December 2002	Lin et al.
6804129	October 2004	Lin
6815906	November 2004	Aarons et al.

Foreign Patent Documents


1444332	Sep., 2003	CN
2213613	Aug., 1989	GB
59032370	Feb., 1984	JP
07211472	Aug., 1995	JP
08288080	Nov., 1996	JP
2733817	Jan., 1998	JP
H11-3039	Jan., 1999	JP
11-146655	May., 1999	JP
2000-197368	Jul., 2000	JP
WO 98/09369	Mar., 1998	WO

Other References

Case No. C013995 JCS ADR, 02Micro International Limited (Plaintiff) v. Monolithic Power Systems, Inc. (Defendant and Counterclaimant), Monolithic Power Systems' Answer to First Amended Complaint and Counterclaim, Dec. 5, 2001. cited by other .
Case No. CV-00-4071 CW (EDL), O2Micro International Limited (Plaintiff) v. Monolithic Power Systems, Inc. (Defendant), Defendant Monolithic Power Systems, Inc.'s Preliminary Invalidity Contentions, Jun. 7, 2002. cited by other .
Case Nos. CV-00-4071 CW and CV-01-3995 CW, O2Micro International Limited (Plaintiff and Counterdefendants) v. Monolithic Power Systems, Inc. (Defendant and Counterclaimant), Defendant and Counterclaimant Monolithic Power Systems, Inc.'s Responsive Claim Construction Brief, Sep. 6, 2002. cited by other .
Case Nos. CV-00-4071 CW and CV-01-3995 CW, O2Micro International Limited (Plaintiff and Counterdefendants) v. Monolithic Power Systems, Inc. (Defendant and Counterclaimant), Defendant and Counterclaimant Monolithic Power Systems, Inc.'s Surreply Claim Construction Brief, Sep. 20, 2002. cited by other .
Case Nos. CV-00-4071 CW and CV-01-3995 CW, O2Micro International Limited (Plaintiff and Counterdefendants) v. Monolithic Power Systems, Inc. (Defendant and Counterclaimant), Order Construing Disputed Claims and Terms, Dec. 27, 2002. cited by other .
Case Nos. CV-00-4071 CW and CV-01-3995 CW, O2Micro International Limited (Plaintiff and Counterdefendants) v. Monolithic Power Systems, Inc. (Defendant and Counterclaimant), Defendant Monolithic Power Systems, Inc.s Final Invalidity Contentions, Feb. 5, 2003. cited by other .
"An Introduction to the Principles and Features of Resonant Power Conversion", Steve Freeland, from Recent Developments in Resonant Power Conversion, Intertec Communications, Inc., 1988, pp. 20-43, No Date. cited by other .
Zero-Voltage Switching Techniques in DC/DC Converters, Kwang-Hwa Liu and Fred C. Lee, from Recent Developments in Resonant Power Conversion, Intertec Communications, Inc., 1988, pp. 211-223, No Date. cited by other .
"A New and Improved Control Technique Greatly Simplifies the Design of ZVS Resonant Inverters and DC/DC Power Supplies", Mehmet K. Nalbant, 1995 IEEE pp. 694-701, No Date. cited by other .
Switching Power Supply Design, Abraham I. Pressman, McGraw-Hill, 1991, pp. 93-104; 471-492, No date. cited by other .
"Phase Shifted, Zero Voltage Transition Design Considerations and the UC3875 PWM Controller", by Bill Andreycak, Unitrode, Application Note, May 1997, pp. 1-14. cited by other .
"Fixed-Frequency, Resonant-Switched Pulse Width Modulation with Phase-Shifted Control", by Bob Mammano and Jeff Putsch, from Power Supply Design Seminar, Unitrode, 1991, pp. 5-1 to 5-7. cited by other .
"Zero Voltage Switching Resonant Power Conversion", by Bill Andreycak, from Power Supply Design Seminar, Unitrode, 1991, pp. A2-1 to A2-24; and A2-1A to A2-3A, No Date. cited by other .
"Resonant Mode Converter Topologies", by Bob Mammano, from Power Supply Design Seminar, Unitrode, 1991, pp. P3-1 to P3-12, No Date. cited by other .
The New UC3879 Phase-Shifed PWM Controller Simplifies the Design of Zero Voltage Transition Full-Bridge Converters by Laszlo Balogh, Unitrode, Application Note, 1995, pp. 1-8, No Date. cited by other .
"A Comparative Study of a Class of Full-Bridge Zero-Voltage-Switched PWM Converters", by W. Chen et al., 1995 IEEE, pp. 893-899, No Date. cited by other .
Optimum ZVS Full-Bridge DC/DC Converter with PWM Phase-Shift Control: Analysis, Design Considerations, and Experimental Results, by Richard Red I et al., 1994 IEEE, pp. 159-165, No Date. cited by other .
A Frequency/PWM Controlled Converter with Two Independently Regulated Outputs, by R.A Fisher et al., HFPC, May 1989, pp. 459-471. cited by other .
High Density Power-Hybrid Design of a Half-Bridge Multi-Resonant Converter, by Richard Farrington, et al., HFPC-Virginia Polytechnic Institute, May 1990, pp. 26-33. cited by other .
Small-Signal Analysis of the Zero-Voltage Switched Full-Bridge PWM Converter, V. Vlatkovic et al., HFPC-Virginia Polytechnic Institute, May 1990, pp. 262-272. cited by other .
Feasible Characteristics Evaluation of Resonant Tank PWM Inverter-Linked DC-DC High-Power Converters for Medical-Use High-Voltage Application, by H. Takano et al., 1995 IEEE, pp. 913-919, No Date. cited by other .
Translation of Japanese Notification and Observations, submitted on Jun. 17, 2003 to Director General of Patent Office, Japanese Patent Application No. 2001-8143, submitted by Noriko Kido. cited by other .
Translation of Japanese Notification and Observations, submitted on Jun. 16, 2003 to Director General of Patent Office, Japanese Patent Application No. 2001-8143, submitted by Mayuka Matsumae. cited by other .
Translation of Japanese Notification and Observations, submitted on Jun. 9, 2003 to Commissioner of the Japanese Patent Office, Japanese Patent Application No. 2001-8143, submitted by Hiromi Goto. cited by other .
Advanced Power Technology, "A New Generation of Power MOSFET Offers Improved Performance at Reduced Cost", by Ken Dierberger, 2001. cited by other .
"Zero-Voltage Switching Technique in DC/Dc Converters", Kwang-Hwa Liu and Fred C. Lee, Department of Electrical Engineering, Virginia Polytechnic Institute and State University. 1986 IEEE, Reprinted with permission; PESC ''86; Vancouver BC, Jun. 23-27, 1986; pp. 58-70. cited by other .
"A Comparative Study of a Class of Full Bridge Zero-Voltage-Switched PWM Converters" W.Chen, F.C. Lee, M.M. Jovanovic and J.A. Sabate1995 IEEE, pp. 893-899. Virginia Power Electronics Center, The Bradley Department of Electrical Engineering. cited by other .
"A Frequency/PWM Controlled Converter with Two Independently Regulated Outputs" R.A. Fisher, R.L. Steigerwald, C.F. Saj, GE Corporate Research and Development Center, HFPC May 1989 Proceedings pp. 459-471. cited by other .
"A New and Improved Control technique Greatly Simplifies the Design of ZVS Resonant Inverters and DC/DC Power Supplies" Memet Nalbant, Linfinity Microelectronics (formerly Silicon General), 1995 IEEE, pp. 694-701. cited by other .
"An Introduction to the Principles and Features of Resonant Power Conversion" Steve Freeland; Rockwell International Corporation, Autonetics ICBM Systems Division. pp. 20-43. cited by other .
"Switching Power Supply Desing" Abraham I. Pressman, Copyright 1991, by McGraw-Hill inc, Chapter 3 pp. 93-104, Chapter 13 pp. 471-492. cited by other .
"Feasible Characteristics Evaluations of Resonant Tank PWM Inverter-Linked DC-DC High-Power Converters for Medical-Use High-Voltage Applications", H. Takano, J. Takahashi, M. Nakaoka. 1995 IEEE, pp. 913-919. cited by other .
"Fixed-Frequency, Resonant-Switched Pulse Width Modulation with Phase-Shifted Control", Bob Mammano and Jeff Putsh, Sep. 1991, pp. 5-1 thru 5-7. cited by other .
"High Density Power-Hybrid Design of a Half-Bridge Multi-Resonant Converter", Richard Farrington, et al. May 1990. Proceedings pp. 26-33. cited by other .
Optimum ZVS Full-bridge DC/DC Converter with PWM Phase-Shift Control: Analysis, Design Considerations, and Experimental Results, Redl, et al. 1994 IEEE, pp. 159-165. cited by other .
Unitrode Application Note U136, Phase Shifted, Zero Voltage Transition Design Considerations and the UC3875 PWM Controller Bill Andreycak, SLUA107 May 1997 pp. 1-14. cited by other .
"Zero-Voltage Switching Resonant Power Conversion" Bill Andreycak, pp. A2-1 thruA2-3A. cited by other .
"Resonant Mode Converter Topologies" Bob Mammano, pp. P3-1 thru P3-12. cited by other .
"Small-Signal Analysis of the Zero-Voltage Switched Full-Bridge PWM Converter", V. Vlatkovic, et al. HFPC May 1990 Proceedings, pp. 262-269. cited by other .
Unitrode Corporation U154, "The New UC3879 Phase-Shifted PM Controller Simplifies the Design of Zero Voltage Transition Full-Bridge Converters", Laszlo Balogh, pp. 1-8. cited by other .
Shiga International Patent Office, English Translation of Citation 8 (CCFL Inverter Design AN01 Using MP1010), Monolithic Power Systems Inc. Excerpt from MSP Co. Applications Notes AN01 v.11 May 1999 pp. 1-7. cited by other .
MPS Monolithic Power Systems, Inc. "Cold Cathode Fluorescent lamp" MP1010 Preliminary Data Sheer v.2 Feb. 1999 pp. 1-6. cited by other .
United States District Court Eastern District of Texas Marshall Division, O2 Micro International Limited V. Monolithic Power Systems Inc, Monolithic power Systems Inc's Answer to first Amended Complaint; Counterclaims; Dec. 13, 2004 pp. 1-17. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LC300W01 Titled "30.0 WXGA TFT LCD" pp. 02 615 009475-02 615 009502. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LM181E1-H2MN Titled "18.1 SXGA TFT LCD" pp. 02-615 009398-02 615 009421. cited by other .
Official Monthly Publication of the Society for Information Display, Nov. 1989 vol. 5, No. 11pp. ERI 009217-ERI 009223. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LB121S1-A2 Titled "12.1 SVGA TFT LCD" pp. 02 615 009226-02 615 009247. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, BLB121S1-N Titled "12.1 SVGA TFT LCD" pp. 02 615 009248-02 615 009271. cited by other .
Bi-Search International, Inc. BLB121S1-S Specification for Approval Titled "12.1 SVGA TFT LCD" pp. 02 615 00272-02 615 009295. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LM151X05 Titled "15.1 XGA TFT LCD" pp. 02-615 009296-02 615 009319. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LC151X01 Titled "15.1 XGA TFT LCD" pp. 02-615 009320-02 615 009371. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LM181E06 Titled "18.1 SXGA TFT LCD" pp. 02-615 009372-02 615 009397. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LM201U1-A3 Titled "20.1 UXGA TFT LCD" pp. 02-615 009422-02 615 009448. cited by other .
LG Philips LCD Specification for Approval Liquid Crystal Display, LM220W1-A2MN Titled "22.0 WSXGA TFT LCD" pp. 02-615 009449-02 615 009474. cited by other .
Advanced Power Technology, Ken Dierberger, APT9703, Application Note "A New Generation of Power MOSFET Offers Improved Performance at Reduced Cost" pp. 1-32. cited by other .
United States District Court for the Northern District of California. Case No: C-00-4071 CW and C-01-3995 CW Order Construing Disputed Claims and Terms O2 Micro International Limited v Monolithic Power Systems, Inc & Monolithic Power Systems, Inc v O 2 Micro International Limited (Counterclaims) Dated Dec. 27, 2002. cited by other .
United States District Court Northern District of California San Francisco Division. Case No: C 01 3995 JCS ADR Monolithic Power Systems Answer to the First Amended Complaint and Counterclaim O2 Micro International Limited v Monolithic Power Systems, Inc & Monolithic Power Systems, Inc v O 2 Micro International Limited (Counterclaims) Dated Dec. 5, 2001. cited by other .
United States District Court Northern District of California Oakland Division. Case No: CV-00-4071 CW and CV-01-3995 Defendant Monolithic Power Systems Final Invalidity Contentions O2 Micro International Limited v Monolithic Power Systems, Inc & Monolithic Power Systems, Inc V. O 2 Micro International Limited (Counterclaims) Dated Feb. 5, 2003. cited by other .
United States District Court Northern District of California Oakland Division. Case No: CV-00-4071 CW (EDL) Defendant Monolithic Power Systems Preliminary Invalidity Contentions O2 Micro International Limited v Monolithic Power Systems, Inc & Monolithic Power Systems, Inc V. O 2 Micro International Limited (Counterclaims) Dated Jun. 7, 2002. cited by other .
United States District Court Northern District of California Oakland Division. Case No: DV-00-4071 CW and CV-01-3995 CW Defendant and Counterclaimant Monolithic Power Systems Responsive Claim Construction-Brief O2 Micro International Limited v Monolithic Power Systems, Inc & Monolithic Power Systems, Inc V. O 2 Micro International Limited (Counterclaims) Dated Sep. 6, 2002. cited by other .
United States District Court Northern District of California Oakland Division. Case No: CV-00-4071 CW and CV-01-3995 CW Defendant and Counterclaimant Monolithic over Systems Surreply Claim Construction Brief O2 Micro International Limited v Monolithic Power Systems, Inc & Monolithic Power Systems, Inc V. O 2 Micro International Limited (Counterclaims) Dated Sep. 20, 2002. cited by other .
English translation of Cancellation Brief filed by Monolithic Power Systems, Inc. in corresponding Taiwan Patent No. NI-152318, 7 pages. cited by other .
English Translation of Defense Statement filed by O2 Micro International Limited in response to Cancellation Brief filed by Monolithic Power Systems, Inc. submitted on May 20, 2003, 9 pages. cited by other .
English Translation of Supplementary Cancellation Brief filed my Monolithic Power Systems, Inc. submitted on Nov. 11, 2003, 19 pages. cited by other .
English Translation of Supplementary Defense Statement filed by O2 Micro International Limited submitted on Jan. 19, 2004, 15 pages. cited by other .
English Translation of Cancellation Brief filed by Beyond Innovation Technology Co., in corresponding Patent No. NI-152318, 12 pages. cited by other .
English Translation of Abstract of Taiwan patent No. 357481, submitted by Beyond Innovation Technology Co., Ltd. in Cancellation Brief. cited by other .
English Translation of Defense Statement filed by O2Micro International Limited in response to Cancellation Brief filed by Beyond Innovation Technology Co., LTD., submitted on May 18, 2004, 12 pages. cited by other .
English Translation of Cancellation Brief filed by Mr. Tsan-Jung Chen in corresponding Taiwan Patent No. NI-152318, 58 pages. cited by other .
English Translation of Power Electronics: Converters, Applications and Designs, pp. 10-49 to 10-50, 2 pages cited by Mr. Tsan-Jung Chen in Cancellation Brief. cited by other .
English Translation of Defense Statement by O2Micro International Limited in response to Cancellation Brief filed by Mr. Tsan-Jung Chen, submitted on May 30, 2003, 14 pages. cited by other .
English Translation of Supplementary Defense Statement by O2Micro international Limited in response to Cancellation Brief filed by Mr. Tsan-Jung Chen, submitted on Mar. 19, 2004, 12 pages. cited by other .
Summary Translation of Taiwanese Office Action in corresponding Taiwanese Application No. 089114672N01, 2 pages. cited by other .
Supplementary Defense Statement for ROC Pat Application No. 089114672N01 Submitted on May 6, 2005; Title High-Efficiency Adaptive DC/AC Converter. cited by other .
Supplementary Defense Statement for ROC Pat. Application. No. 089114672N02 Submitted on May 6, 2005; Titled "High-Efficiency Adaptive DC/AC Converter". cited by other .
Supplementary Defense Statement for ROC Pat. Application No. 089114672N03 Submitted on Apr. 29, 2005; Titled "High-Efficiency Adaptive DC/AC Converter". cited by other .
Cancellation Decision of the Interllectual Property Office Patent Application No, under Cancellation: 089114672N01: Issuance Date May 26, 2005. cited by other .
Cancellation Decision of the Intellectual Property Office Patent Application No. under Cancellation: 089114672N02: Issuance Date May 26, 2005. cited by other .
Cancellation Decision of the intellectual Property Office Patent Application No. under Cancellation: 089114672N03: Issuance Date May 26, 2005. cited by other .
Dierberger, Ken, "A New Generation of Power MOSFET Offers Improved Performance as Reduced Cost." Application Note APT9703, Advanced Power Technology Inc., Dec. 1997: 1-12. cited by other .
Andreycak, Bill, "Phase Shifted Zero Voltage Transition Design Considerations and the UC3875 PWM Controller." Application Note U-136A, Unitrode Corp., SLUA-May 1997: 1-14. cited by other .
"Phase Shift Resonant Controller." Application Note US1879, UC2879, UC3879, Unitrode Corp., Jun. 1998: 1-6. cited by other .
"CCFL Inverter Design AN01 Using MP1010", Microtek Inc., 1st Marketing Section, vol. 11, May 1999, Sep. 1999: 1-7. cited by other .
English Translation Japanese Notification & Observation document 2001-008143: 29 Pages + previously submitted Japanese Notification & Observation Documents 18 pages. cited by other .
Bitek O2Micro International Limited Plaintiff v. Beyond Innovation Technology Co., Ltd., SPI Electronics Co., Ltd., FSP Group, Lien Chang Electronic Enterprise Co., Ltd, Defendants. And Related Counterclaims. Civil Action No. 2-04-CV-32(TJW) Assigned for All Purpose to the Honorable Judge T. John Ward Jury Trial Demanded-Defendant Beyond Innovation Technology Co., LTD's Final Invalidity Contentions 5 pages Exhibits 8, 10, 12-14, 15a, 15b, 16, 18-23, 28, 30, 32, 34, 36, 38-40, 42, 43, 45-48. cited by other .
Hon Hai O2Micro International Limited, Plaintiff v. Hon Hai Precision IndustryCo., Ltd a/k/a/ Foxconn and Ambit Microsystems Corporation Defendants. Case No. 2-05CV-323 (TJW). Hon Ahi Precision Industry Co., LTD.'s Preliminary Invalidity Contentions 33 pages. cited by other .
Hsing O2 Micro International Limited, Plaintiff v. Monolithic Power Systems, Inc. Defendants. Michael Hsing's Preliminary Invalidity Contentions and Monolithic Power Systems Inc.s and Asustek Computer Inc.s Supplemental Invalidity Contentions 27 Pages. cited by other .
MPSTX Case No. 2:04-CV-359 TJW Monolithic Power Systems, Inc. and Asuestek Computer Inc.s Preliminary Invalidity Contentions 23 pages 12 Exhibits 1-26. cited by other .
Sumida O2Micro International Limited, Plaintiff V. Taiwan Sumida Electronics, Inc. Defendant Civil Action No. 2-03CV-007-TJW (Judge Ward) Defendant Taiwan Sumida Electronics, Inc. Final Invalidity Contentions 6 pages Exhibits 1, 2, 4, 7, 8, 10. cited by other .
O2 Micro International Limited (Plaintiff) v. Samsung Electronics Co., Ltd. (Defendant)-Case No. 2-04CV-323 JURY-Complaint for Patnet Infringement 47 pages Voltages and Frequencies (Single Phase), 1987, First Edition. cited by other .
O2 Micro International Limited (Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., Ltd., and Samsung SDI America, Inc. (Defendants)-Case No. 2-04CV-323 (Ward) JURY-First Amended Complaint for Patent Infringement 7 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., Ltd., and Samsung SDI America, Inc. (Defendants)- Civil Action No. 2-04CV-323 (Ward) Defendants Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc.'s Anser to Plaintiff's First Amended Complaint and Counterclaims 11 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., LTD., and Samsung SDI America, Inc. (Defendants)- Case No. 2-04CV-323 Jury--Plaintiff O2 Micro International Limited's Reply to Counter-Defendantds Samsung Electronics Co., Ltd's and Samsung Electronics America, Inc.'s Counterclaims 5 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., LTD., and Samsung SDI America, Inc. (Defendants)- Civil Action No. 2-04CV-323 (Ward) Defendants Samsung SDI Co., Ltd. and Samsund SDI America, Inc.'s Answer to Plaintiff's First Amended Complaint, and Counterclaims 11 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., LTD., and Samsung SDI America, Inc. (Defendants)- Case No. 2-04CV-323 Jury--Plaintiff O2 Micro International Limited's Reply to Defendants Samsung SDI C., Ltd. and Samsund SDI America, Inc.'s Counterclaims 5 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., LTD., and Samsung SDI America, Inc. (Defendants)- Civil Action No. 2-04CV-323 TJW-- Plaintiff O2 Micro International Limited's Opening Claim Construction Brief 50 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., LTD., and Samsung SDI America, Inc. (Defendants)- Civil Action No. 2-04CV-323 TJW-- Plaintiff O2 Micro International Limited's Amended Opening Claim Construction Brief 50 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., Samsung Electronics America, Inc., (Defendants)- Civil Action No. 2-04CV-323 (TJW) Jury-- Samsung Electronics Co., LTD. and Samsung Electronics America, Inc.'s Responsive Brief on Claim Construction 44 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., LTD., Samsung Electronics America, Inc., Samsung SDI Co., LTD., and Samsung SDI America, Inc. (Defendants)- Civil Action No. 2-04CV-323 Ward-- Defendant Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc.'s First Amended Answer 18 pages. cited by other .
O2 Micro International Limited v. Samsung Electronics Co., Ltd., et al.--Civil Action No. 2-04-CV-323 Memorandum Opinion and Order 16 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., and Samsung Electronics America, Inc. (Defendants) Civil Action No. 2-04-CV-323 (Ward) Defendants Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc.'s Second Amended Answer 19 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Sansung Electronics Co., Ltd., Samsung Electronics America, Inc., Samsung SDI Co., LTD., and Samsung SDI America, Inc. (Defendants)--Civil Action No. 2-04-CV-323 (Ward) Order Granting Samsung Electronics Co., Ltd. and Samsun Electronics America, Inc.'s Unopposed Motion for Leave to File A Second Amended Answer 1 page. cited by other .
O2 Micro International Limited(Plaintiff) v. Samsung Electronics Co., Ltd., and Samsung Electronics America, Inc. (Defendants) Civil Action No. 2-04-CV-323 (Ward) Defendants Samsung Electronics Co., Ltd. And Samsung Electronics America, Inc.'s Unopposed Motion for Leave to File a Second Amended Answer 4 pages. cited by other .
O2 Micro International Limited(Plaintiff) v. Rohm Co., LTD, Con

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