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Servo processor receiving photodetector signals

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G11B-021/08
  • G11B-007/09
  • G11B-020/10
출원번호 US-0819796 (2015-08-06)
등록번호 US-9245569 (2016-01-26)
발명자 / 주소
  • Kadlec, Ron J.
출원인 / 주소
  • Optical Devices, LLC
인용정보 피인용 횟수 : 1  인용 특허 : 442

초록

A digital servo method for an optical disk drive includes receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk. Versions of the photodetector signals are digitized to produce digital signals. A focus control signal i

대표청구항

1. A digital servo method for an optical disk drive, comprising: receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, throu

이 특허에 인용된 특허 (442)

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  177. Clark Alan Robert ; Hutchins Robert Allen ; Jaquette Glen Alan, Integrated calibration apparatus for a multi-mode information storage system.
  178. Ledermann Peter Gerard, Intermittent errors in digital disc players.
  179. Ishibashi Hiromichi (Ibaraki JPX) Kobayashi Motoyuki (Nara JPX) Moriya Mitsurou (Ikoma JPX), Jitter measurement apparatus detecting amplitude of phase errors between information signal and synchronized clock signa.
  180. Call David E. (Tucson AZ) Lewkowicz Julian (Tucson AZ), Laser power calibration by measuring laser drive current at out of focus and in focus conditions.
  181. Eastman Clarke K. (Rochester NY) Perconti James A. (Rochester NY) Smart Gerald J. (Penfield NY) Spyra Peter J. (Churchville NY), Laser power control in an optical recording system to compensate for multiple system degradations.
  182. Ohtake Masatoshi (Ome JPX) Yonezawa Seiji (Hachioji JPX) Tsuyoshi Toshiaki (Kokubunji JPX) Takasugi Wasao (Higashiyamato JPX) Takeuchi Takashi (Fujisawa JPX), Light spot position control system and method by sampling servo.
  183. Rees Theodore D. (2296 Sun-Mar Ave. Mountain View CA 94040) Turner Ian (674 Vanderbilt Dr. Sunnyvale CA 94087) Harvey William L. (149 Fairchild Dr. Mountain View CA 94043), Logarithmic servo error detection for optical disk drive.
  184. Watari Haruo (Saitama JPX) Yasuda Sigeru (Saitama JPX), Loop-gain control system in a spindle servo loop.
  185. Phan Duc T. (Santa Clara County CA) Le Tien Q. (Santa Clara County CA), Method and apparatus for adaptive control.
  186. Suwa Masaya,JPX ; Aruga Keiji,JPX, Method and apparatus for analyzing vibration of housing of disk device.
  187. Tsuyoshi Toshiaki (Kokubunji JPX) Mada Takeshi (Kokubunji JPX), Method and apparatus for beam-track alignment in optical disk apparatus.
  188. Semba Tetsuo (Zama JPX), Method and apparatus for calibrating focus and tracking error signals in an optical drive with measuring offsets during.
  189. Igarashi Katsuji,JPX, Method and apparatus for calibrating optical disc systems.
  190. Cunningham Earl Albert ; Fan Long-Sheng ; Ottesen Hal Hjalmar ; Reiley Timothy Clark, Method and apparatus for controlling a multiple-stage actuator for a disk drive.
  191. Ohta, Shinji, Method and apparatus for controlling servo loop amplification according to wobble signals formed in a guide groove of an optical disc.
  192. Summers G. Clayton, Method and apparatus for controlling the linear velocity between an optical head and a rotation disk.
  193. Suzuki Masanori (Saitama JPX) Tateishi Kiyoshi (Saitama JPX), Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop opera.
  194. Hankel Steven G. (Blue Mounds WI) Gunderson Dennis E. (Madison WI) Scott C. Timothy (Mt. Horeb WI) Gleisner ; Jr. Roland L. (Jefferson WI), Method and apparatus for evaluating fold endurance and surface adhesion of sheet materials.
  195. Roth Maxim (Cupertino CA) Godwin Jimmy D. (San Jose CA) Williams Roger O. (Fremont CA), Method and apparatus for generating tracking error signals by means of an optical servo system.
  196. Nishino, Masatoshi; Horigome, Junichi, Method and apparatus for high density recording of data on a disk, and recording medium produced thereby.
  197. Saito Atsushi (Ichikawa JPX) Maeda Takeshi (Kokubunji JPX) Sugiyama Hisataka (Kokubunji JPX) Takasugi Wasao (Higashiyamato JPX), Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type.
  198. Yanagi Shigenori (Kawasaki JPX), Method and apparatus for measuring speed of movement during beam track movement in optical memory apparatus.
  199. Getreuer, Kurt W., Method and apparatus for moving carriage assembly from initial position to target position and optical disc system including same.
  200. Wong Terrence L. ; Lee David C.,HKX ; Martin Richard L. ; Spielman Steven R., Method and apparatus for reading and writing a multi-level signal from an optical disc.
  201. Harold-Barry John A.,GBX, Method and apparatus for reading data from a disc carrier.
  202. Shirane Kyoichi (Kanagawa JPX), Method and apparatus for recording and/or reproducing data on a disk formatted in accordance with a constant linear velo.
  203. Okamoto Hiroo (Yokohama JPX) Kobayashi Masaharu (Yokohama JPX) Noguchi Takaharu (Yokohama JPX) Arai Takao (Yokohama JPX), Method and apparatus for recording digital signals.
  204. Cunningham Earl Albert ; Erickson Kevin Jack ; Ottesen Hal Hjalmar, Method and apparatus for rotary actuator arc compensation correction in a direct access storage device.
  205. Kang, Byung Gyoo, Method and apparatus for sliding an optical pickup.
  206. Semba Tetsuo,JPX ; Kagami Naoyuki,JPX ; Tokizono Akira,JPX, Method and apparatus for suppressing mechanical resonance in a disk drive storage device using a notch filter.
  207. Den Boef Arie J.,NLX, Method and apparatus for writing optical recording media with optimum value of write power.
  208. Yasukawa Kaoru (Ebina JPX) Iguchi Daisuke (Ebina JPX) Ueyanagi Kiichi (Ebina JPX), Method and device for controlling optical head moving speed.
  209. Marrec, Sonia; Lebowsky, Fritz, Method and device for directing an incident optical beam to a track of information on a dynamic medium.
  210. Dieleman Adrianus H. (Eindhoven NLX) Schepers Jos G. (Hasselt BEX) Westerhout Gerrit D. (Eindhoven NLX), Method and device for recording information volumes in a track of a record carrier, and a device for reading the record.
  211. Akkermans Antonius H. M. (Eindhoven NLX), Method and means for detecting and stablizing control loop parameters of apparatus for scanning a record carrier.
  212. Klinger ; Lance T., Method and means for seeking magnetic tracks.
  213. Bates Allen Keith ; Fennema Alan August ; Semba Tetsuo,JPX, Method and sytem for cancelling optical servo crosstalk in optical disk drives.
  214. Barton Mark A. (Rochester NY) Nelson Daniel L. (Penfield NY) Smart ; Jr. Gerald J. (Penfield NY), Method for automatically compensating for the eccentricity in an optical head positioning servo-mechanism.
  215. Lin Chi-Cheng (No. 6 ; Feng Shu Tsuen ; Kweishan Taoyuan TWX), Method for controlling the spindle motor speed of an audio/video disk player.
  216. Takagi Hirohito,JPX ; Schemmann Heinrich,JPX, Method for processing the output signals of an optoelectronic scanner in a replay or recording appliance, and a correspo.
  217. Ohno Eiji (Neyagawa JPX) Yamada Noboru (Hirakata JPX), Method for recording and reproducing information on and from an optical disk having a read-only recorded zone and a writ.
  218. Roth Rudolf (Eindhoven NLX) van der Zande Paulus C. M. (Eindhoven NLX), Method for recording data signals on an inscribable record carrier and reading device for the record carrier.
  219. Roth Rudolf (Eindhoven NLX) Van Der Zande Paulus C. M. (Eindhoven NLX), Method for recording information on a record carrier having a track which is transversely modulated in accordance with a.
  220. Min Kyoung-Seo (Busan KRX), Method for searching a track at high speed in an optical recording/reproducing apparatus.
  221. Ishii Hidehiro (Saitama JPX) Takeya Hiroshi (Saitama JPX) Miura Chiharu (Saitama JPX) Fukuda Tatsuya (Saitama JPX), Method for setting the loop gain in a focusing servo loop.
  222. Ishii Hidehiro (Saitama JPX) Takeya Noriyoshi (Saitama JPX) Miura Chiharu (Saitama JPX) Fukuda Tatsuya (Saitama JPX), Method for setting the loop gain in a tracking servo loop.
  223. Ishii Hidehiro (Tokorazawa JPX) Takeya Noriyoshi (Tokorazawa JPX) Miura Chiharu (Tokorazawa JPX) Fukuda Tatsuya (Tokorazawa JPX), Method for setting the loop gain of servo loops in a disc player.
  224. Corzine Gerald G. (Hazelwood MO) Hagar Charles E. (Augusta MO), Method for testing fluid control valves.
  225. McKenzie, Lealon R.; Sudman, Brian W.; Baum, Michael; Duffy, Dennis D., Method of aligning servo wedges in a disc drive.
  226. Kiyoshi Tateishi JP, Method of and apparatus for detecting and compensating deviation in servo control systems.
  227. Van Der Zande Paulus C. M. (Eindhoven NLX) Hoeven Petrus C. J. (Eindhoven NLX), Method of and apparatus for recording an information signal.
  228. Kurz Arthur (Karlsbad-Langensteinbach DEX) Lufer Engelbert (St. Georgen DEX) Rohde Wilfried (Unterkirnach DEX), Method of and circuitry for automatically adjusting the variable-gain amplification in a control loop.
  229. Satoh Makoto (Tokorozawa JPX) Nakajima Hiroyuki (Tokorozawa JPX), Method of reproducing information of optical disc, method of recording and reproducing the same, apparatus for reproduci.
  230. Richards Norman D. (Horsham GB2) Timmermans Jozef M. K. (Bilzen BEX) Schepers Jos G. (Peer BEX) Voogd Harmen D. (Best NLX), Method of storing user information items and apparatus for reproducing stored items.
  231. Nemirovsky Mario D. (Goleta CA) Sale Matthew D. (Kokomo IN), Microprogrammed timer processor.
  232. Morehouse James H. (Jamestown CO) Volk Steven B. (Boulder CO) Utenick Michael R. (Englewood CO) Blagaila John H. (Boulder CO), Miniature disk drive with spin motor control system.
  233. Fujisaki Yoshihiro,JPX ; Emura Shinichi,JPX, Motor drive control system.
  234. Victora Randall Harry ; Gage Edward Charles, Multilayer optical data storage device.
  235. Galloway Paul A., Notch filtering as used in a disc drive servo.
  236. Tze Ming Pang, Jimmy, Notch filtering as used in a disc drive servo.
  237. Silvy Dorrel R. (Elbert CO) Baumann Todd D. (Berthoud CO) Bracht Roger R. (Colorado Springs CO), Objective lens focus initialization system.
  238. Hofer Gregory V., Off track detection system and method for ruggedized optical disk drive.
  239. Hofer Gregory V. (Boise ID), Off track detection system for ruggedized optical disk drive.
  240. Fennema Alan A. (Tucson AZ), Operating optical disk drives including calibrating a tracking error signal.
  241. Tinet Claude (Paris FRX), Optical arrangement and a reading apparatus including detection of data elements diffractive along entire extent.
  242. Yoshimoto Kyosuke (Amagasaki JPX) Shimoda Kyouji (Amagasaki JPX), Optical data medium driving apparatus and a servo circuit with normalization processing.
  243. Verboom Johannes J. (Black Forest CO) Wamble Fred N. (Colorado Springs CO), Optical data recorder with segment synchronization marks.
  244. Miyagawa Naoyasu (Suita JPX) Gotoh Yasuhiro (Kadoma JPX), Optical disc apparatus with tracking error compensation.
  245. Nemoto Shigeru,JPX, Optical disc discriminating apparatus.
  246. Ryoichi Nakanishi JP; Hiroshi Nishikawa JP; Suguru Takishima JP; Shimpei Shinozaki JP, Optical disc drive.
  247. Ide, Koji, Optical disc drive and method of discriminating various types of optical discs.
  248. Supino Louis ; Romano Paul M. ; Reiff Francis H., Optical disc drive comprising switching gains for forcing phase states to follow a sliding line trajectory in a servo s.
  249. Yamada Minoru,JPX, Optical disc drive having accessing from a current position within a lead-in area.
  250. Nakajima Hiroyuki (Tokorozawa JPX) Satoh Makoto (Tokorozawa JPX), Optical disc having information units comprising a plurality of separated pit pieces, and playback apparatus and recordi.
  251. Satoh Makoto (Tokorozawa JPX) Nakajima Hiroyuki (Tokorozawa JPX), Optical disc having square information pits arranged in symmetrical patterns.
  252. Tsuda, Hiroyuki; Suzuki, Takayuki; Kamiya, Tomonori, Optical disc player with sleep mode.
  253. Henmi Fumiaki (Tokyo JPX) Yamagami Tamotsu (Tokyo JPX), Optical disc recording and reproducing apparatus with improved servo control.
  254. Kudo Junichi (Tokyo JPX) Senoguchi Ryosuke (Kanagawa JPX), Optical disc recording apparatus which controls re-recording after a disturbance as a function of the capacity of an inp.
  255. Tachibana Kaoru,JPX, Optical disc reproducing apparatus, signal processing apparatus and method of the same.
  256. Schell David L., Optical disc system and method for changing the rotational rate of an information storage medium.
  257. Watanabe Tetsu (Tokyo JPX) Aoki Yoshio (Tokyo JPX), Optical disc system and optical disk therefor.
  258. Schell David L. ; Crupper Randolph S. ; Davis Marvin B. ; Getreuer Kurt W. ; Grassens Leonardus J. ; Lewis David E., Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum sign.
  259. Yanagi Shigenori (Kawasaki JPX) Sasaki Masateru (Yokohama JPX) Minami Akira (Yokohama JPX) Iwamoto Toshitaka (Kawasaki JPX) Tanaka Shigeyoshi (Kawasaki JPX), Optical disk access system.
  260. Sugaya Toshihiro (Ibaraki JPX) Honguh Yoshinori (Yokohama JPX), Optical disk and optical disk apparatus where information is recorded having a specific track pitch and as a plurality o.
  261. Kishimoto, Takashi; Yamamoto, Takeharu; Fujiune, Kenji; Watanabe, Katsuya, Optical disk apparatus.
  262. Suenaga Kiyoyuki (Kasuga JPX) Gondo Hiroyuki (Chikushino JPX) Taromaru Makoto (Fukuoka JPX) Muraoka Koji (Kasuga JPX) Sagata Shingo (Kasuga JPX), Optical disk apparatus.
  263. Watanabe Katsuya,JPX ; Moriya Mitsurou,JPX ; Yamada Shin-ichi,JPX ; Edahiro Yasuaki,JPX ; Yamamoto Takeharu,JPX, Optical disk apparatus.
  264. Watanabe Katsuya,JPX ; Moriya Mitsurou,JPX ; Yamada Shin-ichi,JPX ; Edahiro Yasuaki,JPX ; Yamamoto Takeharu,JPX, Optical disk apparatus.
  265. Watanabe Katsuya,JPX ; Yamamoto Takeharu,JPX ; Kishimoto Takashi,JPX ; Moriya Mitsurou,JPX, Optical disk apparatus.
  266. Watanabe, Katsuya; Moriya, Mitsurou; Yamada, Shin ichi; Edahiro, Yasuaki; Yamamoto, Takeharu, Optical disk apparatus.
  267. Nanba Yoshiyuki,JPX ; Moritsugu Masaharu,JPX, Optical disk apparatus and recording and reproducing method of optical recording medium.
  268. Katsumata Makoto (Ichikawa JPX), Optical disk apparatus for reading and writing data on an optical disk having tracks formed by adjacent grooves and land.
  269. Osada Yutaka,JPX, Optical disk apparatus having an improved tracking control system.
  270. Yasuhito Soma JP; Akira Matsubara JP; Kazuhiko Kouno JP, Optical disk apparatus having compensation for objective lens dislocation.
  271. Ohara Shunji (Higashiosaka JPX) Moriya Mitsuro (Ikoma JPX) Fukushima Yoshihisa (Osaka JPX) Ishibashi Kenzo (Moriguchi JPX), Optical disk apparatus operative with optimal recording power setting.
  272. Yanagi Shigenori (Kawasaki JPX), Optical disk apparatus using transition control between positioner seek control and lens seek control.
  273. Okawa Sumihiro (Kanagawa JPX), Optical disk apparatus utilizing exclusively allocated servo signal processing registers.
  274. Arai Hiroshi,JPX, Optical disk device which performs auto gain control process on servo signals which perform illuminating control of a l.
  275. Yoshioka You,JPX, Optical disk discriminating apparatus.
  276. Kagami Naoyuki,JPX ; Kubo Hiroaki,JPX ; Okada Keiichi,JPX, Optical disk drive and methods for counting the number of tracks on an optical disk.
  277. Wachi Shigeaki (Tokyo JPX), Optical disk drive with servo loop for detecting defective disks.
  278. Koishi Kenji,JPX ; Ohara Shunji,JPX ; Ishida Takashi,JPX ; Satoh Isao,JPX ; Takemura Yoshinari,JPX ; Gushima Toyoji,JPX ; Deguchi Hironori,JPX ; Mitui Yoshitaka,JPX, Optical disk having a rewritable area and a read-only area.
  279. Ueda Hirotada (Kokubunji JPX) Yonezawa Seiji (Hachioji JPX) Takeuchi Takashi (Fujisawa JPX), Optical disk medium and its application method and system.
  280. Sun Kai C. K. ; Grimsley John L., Optical disk motor servo and method for closed loop speed control.
  281. Kunikata Norikazu (Musashino JPX) Murata Tatsuya (Tokorozawa JPX), Optical disk pickup control apparatus and method providing stabilized search operations.
  282. Sasaki Takeshi (Kanagawa JPX) Noda Hidenobu (Kanagawa JPX), Optical disk player with a digital servo-control circuit incorporating a time sharing multifunctional digital filter.
  283. Fennema Alan A. (Tucson AZ) Finkelstein Blair I. (Tucson AZ) Tayefeh Morovat (Tucson AZ) Yardy Raymond (Tucson AZ), Optical disk recorder for diverse media types and having a predetermined initialization or start-up procedure.
  284. Naruhiro Okamoto JP; Hiroshi Oyabu JP, Optical disk reproducing device.
  285. Minami Akira (Yokohama JPX) Tanaka Shigeyoshi (Kawasaki JPX), Optical disk tracking control system and method having normalized tracking error control signal.
  286. Park Sang-On,KRX ; Shin Jong-In,KRX, Optical disk write/read apparatus and optical disk write method.
  287. Ohno Takehide,JPX, Optical head device including fixed and movable deflection means.
  288. Tani Naoaki (Hachioji JPX), Optical head using image sensor of XY address type in photo detector.
  289. Koyama Osamu (Kawasaki JPX) Kato Tadashi (Kawasaki JPX) Usui Masayuki (Yokohama JPX) Watanabe Yoshihiko (Yokohama JPX) Baba Hisatoshi (Yokohama JPX) Ando Hirotake (Tokyo JPX) Nakajima Hideo (Yokohama, Optical information processing apparatus for correcting linearity of a photosensor output with respect to power of an em.
  290. Koyama Osamu (Kawasaki JPX) Kato Tadashi (Kawasaki JPX) Usui Masayuki (Yokohama JPX) Watanabe Yoshihiko (Yokohama JPX) Baba Hisatoshi (Yokohama JPX) Ando Hirotake (Tokyo JPX) Nakajima Hideo (Yokohama, Optical information processing apparatus in which the offset of a tracking error signal is corrected in accordance with.
  291. Koyama Osamu (Kawasaki JPX) Kato Tadashi (Kawasaki JPX) Usui Masayuki (Yokohama JPX) Watanabe Yoshihiko (Yokohama JPX) Baba Hisatoshi (Yokohama JPX) Ando Hirotake (Tokyo JPX) Nakajima Hideo (Yokohama, Optical information processing apparatus including a correction circuit for correcting non-linearity of an output of a p.
  292. Tominaga Hidekazu (Kawasaki JPX), Optical information processing apparatus provided with means for detecting abnormality of focusing servo with a predeter.
  293. Koyama Osamu (Kawasaki JPX) Kato Tadashi (Kawasaki JPX) Usui Masayuki (Yokohama JPX) Watanabe Yoshihiko (Yokohama JPX) Baba Hisatoshi (Yokohama JPX) Ando Hirotake (Tokyo JPX) Nakajima Hideo (Yokohama, Optical information processing method and apparatus including measuring and correcting the offset of a tracking error si.
  294. Maeda, Takeshi; Tsunoda, Yoshito; Huno, Takakazu; Takasago, Masahiro; Mizoguchi, Yasumitsu, Optical information processor.
  295. Baba Hisatoshi,JPX, Optical information recording and or reproducing apparatus and method for irradiating a recording medium having a plura.
  296. Ogino Tsukasa (Yokohama JPX), Optical information recording and reproducing apparatus that approximates an error signal when one cannot be detected.
  297. Ando Hirotake,JPX, Optical information recording and/or reproducing apparatus capable of selecting one of focusing error signals depending.
  298. Baba Hisatoshi,JPX, Optical information recording/reproducing apparatus and method with automatic servo loop adjustment function.
  299. Koyama Osamu,JPX, Optical information recording/reproducing method and apparatus for determining a relative tracking offset amount of lig.
  300. Takeuchi Toyoaki (Ina JPX) Ikeda Yoshiaki (Hachioji JPX), Optical information recording/reproducing system with variable gain servo error correction in response to detected track.
  301. Sasaki Kenichi (Tokyo JPX), Optical information recording/reproduction apparatus including an integrated photodetector used in the detection of focu.
  302. Moriwaki Isamu (Hiratsuka JPX) Kiguchi Hiroyuki (Atsugi JPX), Optical pickup apparatus.
  303. Kuwabara Toru (Gunma JPX) Hirasawa Kazuo (Kyoto JPX) Nishimura Kiyomitsu (Hyogo JPX), Optical pickup apparatus having switch for allowing positional adjustment.
  304. Ohshita Akihiro,JPX ; Hino Terufumi,JPX, Optical pickup position control device.
  305. Ohshita Akihiro,JPX ; Hino Terufumi,JPX, Optical pickup position control device.
  306. Opheij Willem G. (Eindhoven NLX), Optical record carrier with surface layer extending to the center of a substantially circular information track structur.
  307. Kishimoto, Takashi; Yamamoto, Takeharu; Watanabe, Katsuya; Takeuchi, Tatsuya, Optical recording and reproducing apparatus.
  308. Shinoda Masahisa (Nagaokakyo JPX) Kime Kenjiro (Nagaokakyo JPX) Matozaki Toshiya (Nagaokakyo JPX) Nakamura Keiji (Nagaokakyo JPX) Yoshihara Toru (Nagaokakyo JPX) Ito Takeshi (Nagaokakyo JPX), Optical recording and reproducing apparatus for tracking wobbling guide grooves.
  309. Kobayashi Kazutoshi (Tokorozawa JPX), Optical recording and reproducing apparatus making access by multitrack jump.
  310. Yoshida Toshifumi (Suita JPX) Nabae Mitsuo (Nagaokakyo JPX) Nishinaka Yasuo (Hirakata JPX) Moriya Mitsuro (Neyagawa JPX), Optical recording and reproducing device with normalization of servo control signal using switchable automatic gain cont.
  311. Yoshikawa Shoji (Hachioji JPX) Funada Saburo (Hamura JPX), Optical recording and reproducing equipment.
  312. Wachi Shigeaki (Kanagawa JPX), Optical recording medium and recording and/or reproducing apparatus using such optical recording medium.
  313. Kobayashi Shoei,JPX ; Yamagami Tamotsu,JPX ; Takeda Toru,JPX ; Ogawa Hiroshi,JPX ; Sako Yoichiro,JPX, Optical recording medium having a plurality of sectors separated by sync signals.
  314. Horimai Hideyoshi (Kanagawa JPX), Optical recording medium having first and second pit strings on opposite sides of each track.
  315. Rokutan Takao (Higashimurayama JPX), Optical recording/reproducing apparatus.
  316. Watanabe Katsuya (Suita JPX) Idehara Hiroshi (Nara JPX), Optical recording/reproducing apparatus with variable control.
  317. Edahiro Yasuaki (Hirakata JPX) Watanabe Katsuya (Suita JPX), Optical recording/reproducing device having means for adjusting servo loop gain and phase characteristics.
  318. Ito Ken-ichi (Hachioji JPX), Optical recording/reproducing head access controlling apparatus for an optical type information recording/reproducing ap.
  319. Takashi Kishimoto JP; Katsuya Watanabe JP; Mitsurou Moriya JP; Takeharu Yamamoto JP; Kouichi Ikeuchi JP; Kazushi Andoh JP, Optical recording/reproduction device.
  320. Leenknegt George A. L. (Eindhoven NLX), Optical scanning apparatus including beam focal point position control when out of focus range.
  321. Opheij Willem G. (Eindhoven NLX) Van Rosmalen Gerard E. (Eindhoven NLX) Van Engelen Gerard (Eindhoven NLX), Optical scanning unit with tracking error detection.
  322. Mokry, Wesley Ladd; Baird, Rex Thomas, Optical servo control circuits and methods using pulse width modulation and offset control for driving an electromechanical motor.
  323. Leonhardt Michael Lawrence ; Wilson Scott David, Optical servo system for a tape drive.
  324. Leonhardt Michael Lawrence ; Wilson Scott David, Optical servo system for a tape drive.
  325. Leonhardt, Michael Lawrence; Wilson, Scott David, Optical servo system for a tape drive.
  326. Farnsworth Stephen W. (Berthoud CO) Wilson Scott D. (Westminster CO), Optical servo system for magnetic disk.
  327. Yamashita Tomonori,JPX ; Yanagi Shigenori,JPX, Optical storage apparatus.
  328. Yamashita Tomonori,JPX ; Yanagi Shigenori,JPX, Optical storage apparatus having improved eccentricity correction abilities.
  329. Yamashita Tomonori,JPX ; Yanagi Shigenori,JPX, Optical storage apparatus having track seek control unit providing improved seek performance.
  330. Ikeda Toru,JPX, Optical storage apparatus with track seeking control system.
  331. Raaymakers Wilhelmus P. M. (Eindhoven NLX) Kuijpers Franciscus L. J. M. (Eindhoven NLX), Optically readable record carrier for recording information, apparatus for manufacturing such a record carrier, apparatu.
  332. Raaymakers Wilhelmus P. M. (Eindhoven NLX) Kuijpers Franciscus L. J. M. (Eindhoven NLX) Veenis Aartje W. (Eindhoven NLX) Pasman Johannes H. T. (Eindhoven NLX) Mulder Hendricus A. M. (Eindhoven NLX), Optically readable record carrier for recording information, method and apparatus for manufacturing such, apparatus for.
  333. Carasso Marino G. (Eindhoven NLX) Verboom Johannes J. (Eindhoven NLX), Optically readable record carrier with track undulations for producing a synchronizing clock signal and apparatus for fo.
  334. Zaima Yoshie,JPX, Optimum reproduction laser power based on amplitude level of information signal.
  335. Oliver Thomas C. ; Ellis David J. ; Embry Leo J., Overlapped spin-up process for optical disk drive.
  336. Pope Steven M. (Los Gatos CA), Peripheral device control system using changeable firmware in a single flash memory.
  337. Dobbek, Jeffrey J., Personalization of dasd servo parameters through calibration feedback.
  338. Ijima, Shinichi; Takasuka, Shoichi; Nakanishi, Hideyuki; Yoshikawa, Akio, Photodetector unit, and optical pickup, optical reproduction apparatus, and optical recording apparatus equipped with the same.
  339. Horie Yuji (Hachioji JPX) Yoshikawa Shoji (Hachioji JPX), Photodisc apparatus with gain control of tracking servo loop.
  340. Sugiyama Toshio (Toyokawa JPX) Maeda Takeshi (Kokubunji JPX), Photoelectric focus and tracking apparatus.
  341. De Bie Boele,HKX, Player for reading audio signals and/or video signals from a medium.
  342. Kodama Koji (Odawara JPX), Plural diverse processors for control of a disk apparatus.
  343. Cummings Joel (Ocala FL) Hooven Michael D. (Miami FL), Portable instrument to test pressure/flow of ventricular shunt valves.
  344. Sander Ingolf (Cupertino CA) Richgels Jerome F. (Sunnyvale CA) Kuklewicz John C. (Sunnyvale CA), Position mode track seek servo for high capacity disk drive system.
  345. Hopper Michael G. (Alameda CA), Position sensing apparatus with continuous update.
  346. Chow William W. (Tucson AZ) Fennema Alan A. (Tucson AZ) Fiorino Benjamin C. (Tucson AZ) Henderson Ian E. (Tucson AZ) Kadlec Ronald J. (Tucson AZ) Roberts Spencer D. (Tucson AZ), Positioning systems including reliable track crossing detection for high speed relative motions.
  347. Wallis A. Dague ; Frederick Mark Stefansky, Pre-assembled voice coil magnetic assembly and rotatable attachment structure/method to base plate for disc drive.
  348. McLean Kenneth W. ; Campbell Steven J. ; Nolt M. Luke, Protective structure for a modular disc cutterbar.
  349. Benkowski Robert J. ; Lynch Bryan E., Pulsatile flow system and method.
  350. Goldstein Steven ; Black Kirby S., Pulsatile flow system for developing heart valves.
  351. Supino Louis ; Romano Paul M., Quadrature signal generator using an adaptive length dual arm correlator for optical storage devices.
  352. Kim Chun-Sup,KRX, Read channel circuit for optical disk reproducing apparatus.
  353. Zhang,Tao; Gomez,Kevin Arthur; Bi,Qiang; Ding,MingZhong; Kuan,Stephen Kow Chiew, Real-time automatic loop-shaping for a disc drive servo control system.
  354. Schylander Erik C. (Eindhoven NLX), Record carrier, reading apparatus for reading a record carrier, and method and recording apparatus for recording informa.
  355. Pasman Johannes H. T. (Eindhoven NLX) Van Hijningen Nicolaas C. J. A. (Eindhoven NLX), Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses a.
  356. Pasman Johannes H. T. (Eindhoven NLX) Van Hijningen Nicolaas C. J. A. (Eindhoven NLX), Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses a.
  357. Kaida Katsuhiko (Tokyo JPX) Asai Kenji (Tokyo JPX), Recorded data reproducing apparatus.
  358. Sasaki Yoshio (Kanagawa JPX), Recording and/or reproducing apparatus and method of controlling same.
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  1. Hoffberg, Steven M., Steerable rotating projectile.
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