Miniature computer

Details Miniature computer Miniature computer

1980-05-14

1981-12-29

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 46, 360 67, G11B 509, G11B 502

Patent

active

043085610

ABSTRACT:
A reproducing circuit is provided for reproducing digital information recorded in a cassette tape by frequency modulation in which different first and second digital logic levels are respectively represented by first and second repeated signals having respective first and second repeated frequencies, the first repeated frequency being higher than the second. A pulse forming circuit produces first and second pulse signals having the first and second repeated frequencies in response to the signals recorded on the cassette tape. The first or second pulse signals are applied to a one-shot circuit as a trigger signal and to the control input terminal of a flip-flop circuit as a control signal. The output of the one-shot circuit is supplied to the data input terminal of the flip-flop circuit, whereby reproduced digital information corresponding to the digital information recorded on the cassette tape is derived from the output terminal of the flip-flop circuit.

REFERENCES:
patent: 3750121 (1973-07-01), Lee
patent: 4183066 (1980-01-01), Anderson

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