Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Synchronizing moving-head moving-record recorders
Patent
1990-05-18
1993-06-08
Dixon, Joseph L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Synchronizing moving-head moving-record recorders
360 7713, G11B 5584
Patent
active
052184897
ABSTRACT:
An auto tracking apparatus for automatically controlling tracking by using the head switching pulse and the envelope waveform of the composite video signal which is generated by a reproducing head. The auto tracking apparatus includes, an envelope detection means for detecting the envelope waveform of the frequency modulated signal detected by the reproducing head, a waveform shaping means for shaping the envelope waveform detected by the envelope detection means into a direct current, a second amplifier means for amplifying a pulse train generated in response to a head switching pulse, and for filtering the pulse train, a comparator means for comparing the filtered sampling pulse with the signal outputted from the second amplifier means, and for outputting the pulse as a different duty cycle, and microcomputer means for controlling the servo stage based on the output signal from the comparator means, sampling the head switching pulse with a constant interval, and supplying it to the second amplifier means.
REFERENCES:
patent: 5055952 (1991-10-01), Noh
Millman, Jacob, Microelectronics, McGraw-Hill Book Co., 1979, p. 646.
Hong Bong-keun
Jeong Seog-wu
Bushnell Robert E.
Dixon Joseph L.
Robertson David L.
Samsung Electronics Co,. Ltd.
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