Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1997-06-05
1998-12-08
Hindi, Nabil
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 59, G11B 700
Patent
active
058480463
ABSTRACT:
A signal processing circuit converts a serial analog signal, obtained by sequentially reading data recorded on a disk by a head, to a parallel digital signal to be output. The signal processing circuit also converts an externally input parallel digital signal to a serial analog signal at the time of recording data on the disk and sends the analog signal to the head. The signal processing circuit comprises a converter that converts the serial analog signal of data read from the disk to a serial digital signal and converts the parallel digital signal of externally input data to an analog signal in order to send the analog signal to the head. A shift register converts the serial digital signal received from the converter to a parallel digital signal in a data read mode and converts the parallel digital signal externally input to a serial digital signal to send the serial digital signal to the converter in a data write mode. A processor operates faster than the disk access speed to perform a predetermined reading process on the parallel digital signal received from the shift register to send out the resultant signal and to perform a predetermined writing process on the parallel digital signal externally input to send the resultant signal to the shift register. A program memory, connected to the processor, stores programs associated with the reading process and writing process that are performed by the processor.
REFERENCES:
patent: 4651277 (1987-03-01), Sakaji
Fujitsu Limited
Hindi Nabil
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