METHOD FOR ULTRA-HIGHLY STABLE CONSTANT SPEED CONTROL AND POSITIONING CONTROL OF ROTATION SYSTEM USING ATOMIC FREQUENCY STANDARD DEVICE FOR MECHANICAL CONTROL REFERENCE OSCILLATOR

WIPO Patent Application WO/2004/004110

A1

A method for using an atomic clock or atomic frequency standard device using rubidium for a reference oscillator for a machine so as to perform constant speed control or positioning control of a rotation system of the machine and perform control system signal processing in analog or digital mode. The method using an atomic clock or an atomic frequency standard device for a reference oscillator for a machine can utilize an excellent frequency stability and frequency accuracy inherent to the atomic clock or the atomic frequency standard device using rubidium, cesium, hydrogen, or mercury. Accordingly, it is possible to realize a digital recording/reproduction system and a digital recording/reproduction device in which generation of jitter is significantly reduced during digital data recording and reproduction using the machine rotation system, synchronization accuracy is significantly improved, and a residual error generating even by using the code error correction technique is minimized, thereby significantly improving the recording/reproduction ability to have a high quality.

JPS5981711

ELECTRIC-HYDRAULIC SERVO DEVICE

OHASHI MASAMICHI (JP)
TSUCHIYA MASAMICHI (JP)

PCT/JP2003/007044

January 08, 2004

June 03, 2003

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NIPPON SOGO SEISAKU CO LTD (JP)
OHASHI MASAMICHI (JP)
TSUCHIYA MASAMICHI (JP)

G05D3/18; H02P29/00; H03L7/00; (IPC1-7): H02P5/00

JPH09163779A	1997-06-20
US4313074A	1982-01-26
US6300841B1	2001-10-09
US6333942B1	2001-12-25
US4661782A	1987-04-28

Shimoda, Tatsuya (2-6-16 Sangenjay, Setagaya-ku Tokyo, JP)

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