Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1992-10-06
1994-09-27
Young, W. R.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 4425, 369 4428, 369 4429, 369 4434, 369 54, G11B 7085
Patent
active
053512227
ABSTRACT:
A rectangular wave generator includes a comparator having a first input terminal receiving an input signal, a second input terminal, and an output terminal. The comparator slices the input signal at a hysteresis voltage so that a rectangular wave is output via the output terminal. The generator also includes a differentiating circuit connected between the output terminal and the second input terminal. The differentiating circuit functions as a feedback circuit. In lieu of the differentiating circuit, it is possible to use a feedback circuit connected between the output terminal and the second input terminal, the feedback circuit comprising a control unit for changing a feedback quantity of the differentiating circuit in accordance with variations in a frequency of the input signal.
REFERENCES:
patent: 3718864 (1973-02-01), Kelly et al.
patent: 4339727 (1982-07-01), Kage et al.
patent: 4418406 (1983-11-01), Ogawa
patent: 4549099 (1985-10-01), Yamada et al.
patent: 5161137 (1992-11-01), Suzuki
Ikeda Toru
Yanagi Shigenori
Fujitsu Limited
Young W. R.
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