Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1982-06-14
1985-07-30
Faber, Alan
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 59, 369124, G11B 700
Patent
active
045326215
ABSTRACT:
A disk recording device of the invention has a detector for detecting the position of an optical head with respect to the radial direction of a disk, using an optical scale, and a position signal processing circuit for generating a position signal from the output signal from the detector. An output signal from the circuit is converted by a D/A converter into a voltage signal, which is supplied to a voltage controlled oscillator. The oscillator generates a frequency signal. The frequency signal is supplied to a page buffer storing video data and one input of an AND circuit. The other input of the AND circuit is connected to receive a video data from the page buffer. The AND circuit generates a logic product of the frequency signal and the video data, or a recording timing signal having a frequency which is proportional to the position of the head with respect to the radial direction of the disk.
REFERENCES:
patent: 3939302 (1976-02-01), Kihara
patent: 3962688 (1976-06-01), Westerberg
patent: 3980818 (1976-09-01), Browning
patent: 4067044 (1978-01-01), Maeda
patent: 4142210 (1979-02-01), Otobe
patent: 4157568 (1979-06-01), Ohki
patent: 4223349 (1980-09-01), Dakin
patent: 4228326 (1980-10-01), Dakin
patent: 4338683 (1982-07-01), Furukawa
Faber Alan
Tokyo Shibaura Denki Kabushiki Kaisha
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