SPINDLE SERVO EQUIPMENT IN INFORMATION RECODING DISK REPRODUCING DEVICE
PURPOSE:To attain low cost by detecting a phase difference between a synchronizing signal included in a reproduced digital signal and reference signal at the time of pulling in a servo and applying the drive control of a spindle motor based on the phase difference so as to eliminate a frequency gene...
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| creator | ISHII HIDEHIRO WATANABE OSAMU YOSHIO JUNICHI TAKEYA TOMOYOSHI KATAUE KAZUHIKO IZUMO TAKESHI |
| description | PURPOSE:To attain low cost by detecting a phase difference between a synchronizing signal included in a reproduced digital signal and reference signal at the time of pulling in a servo and applying the drive control of a spindle motor based on the phase difference so as to eliminate a frequency generator and its relevant circuit. CONSTITUTION:The frequency of a reference clock generated from a reference clock generator 43 in a digital information demodulation system is constant and the spindle servo is applied based on the phase difference between a frequency division signal of a fixed reference clock and a frequency division signal of a frame synchronizing signal. That is, in case of the reproduction, the phase difference between the synchronizing signal included in the reproduced digital signal and the reference signal is detected to pull in the spindle servo based on the phase difference. Since the frequency generator and its relevant circuit are omitted, the low cost is attained. |
| format | Patent |
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CONSTITUTION:The frequency of a reference clock generated from a reference clock generator 43 in a digital information demodulation system is constant and the spindle servo is applied based on the phase difference between a frequency division signal of a fixed reference clock and a frequency division signal of a frame synchronizing signal. That is, in case of the reproduction, the phase difference between the synchronizing signal included in the reproduced digital signal and the reference signal is detected to pull in the spindle servo based on the phase difference. 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CONSTITUTION:The frequency of a reference clock generated from a reference clock generator 43 in a digital information demodulation system is constant and the spindle servo is applied based on the phase difference between a frequency division signal of a fixed reference clock and a frequency division signal of a frame synchronizing signal. That is, in case of the reproduction, the phase difference between the synchronizing signal included in the reproduced digital signal and the reference signal is detected to pull in the spindle servo based on the phase difference. Since the frequency generator and its relevant circuit are omitted, the low cost is attained.</description><subject>INFORMATION STORAGE</subject><subject>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1988</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHAPDvD0c_FxVQh2DQrzV3ANDPUM8HX1C1Hw9AMiN_8gX8cQT38_hSBXZ38XTz93BRfPYG8gLyDI3yXUGSzgGubp7MrDwJqWmFOcyguluRkU3VxDnD10Uwvy41OLCxKTU_NSS-K9AoLNjA0tzE3MDB2NiVEDAAT8LSk</recordid><startdate>19880803</startdate><enddate>19880803</enddate><creator>ISHII HIDEHIRO</creator><creator>WATANABE OSAMU</creator><creator>YOSHIO JUNICHI</creator><creator>TAKEYA TOMOYOSHI</creator><creator>KATAUE KAZUHIKO</creator><creator>IZUMO TAKESHI</creator><scope>EVB</scope></search><sort><creationdate>19880803</creationdate><title>SPINDLE SERVO EQUIPMENT IN INFORMATION RECODING DISK REPRODUCING DEVICE</title><author>ISHII HIDEHIRO ; WATANABE OSAMU ; YOSHIO JUNICHI ; TAKEYA TOMOYOSHI ; KATAUE KAZUHIKO ; IZUMO TAKESHI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS63187461A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1988</creationdate><topic>INFORMATION STORAGE</topic><topic>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>ISHII HIDEHIRO</creatorcontrib><creatorcontrib>WATANABE OSAMU</creatorcontrib><creatorcontrib>YOSHIO JUNICHI</creatorcontrib><creatorcontrib>TAKEYA TOMOYOSHI</creatorcontrib><creatorcontrib>KATAUE KAZUHIKO</creatorcontrib><creatorcontrib>IZUMO TAKESHI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ISHII HIDEHIRO</au><au>WATANABE OSAMU</au><au>YOSHIO JUNICHI</au><au>TAKEYA TOMOYOSHI</au><au>KATAUE KAZUHIKO</au><au>IZUMO TAKESHI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>SPINDLE SERVO EQUIPMENT IN INFORMATION RECODING DISK REPRODUCING DEVICE</title><date>1988-08-03</date><risdate>1988</risdate><abstract>PURPOSE:To attain low cost by detecting a phase difference between a synchronizing signal included in a reproduced digital signal and reference signal at the time of pulling in a servo and applying the drive control of a spindle motor based on the phase difference so as to eliminate a frequency generator and its relevant circuit. CONSTITUTION:The frequency of a reference clock generated from a reference clock generator 43 in a digital information demodulation system is constant and the spindle servo is applied based on the phase difference between a frequency division signal of a fixed reference clock and a frequency division signal of a frame synchronizing signal. That is, in case of the reproduction, the phase difference between the synchronizing signal included in the reproduced digital signal and the reference signal is detected to pull in the spindle servo based on the phase difference. Since the frequency generator and its relevant circuit are omitted, the low cost is attained.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS |
| title | SPINDLE SERVO EQUIPMENT IN INFORMATION RECODING DISK REPRODUCING DEVICE |
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