G - Physics – 11 – B
Patent
G - Physics
11
B
352/11, 352/21.3
G11B 20/10 (2006.01) G11B 5/55 (2006.01) G11B 15/467 (2006.01) G11B 21/10 (2006.01)
Patent
CA 2006127
(1) ATF CONTROLLER FOR DIGITAL AUDIO TAPE RECORDER ABSTRACT Disclosed is a system capable of producing an offset signal according to the level difference between two channels after digital conversion of pilot signal in ATF controller of DAT. The automatic track finding controller for digital audio tape recorder comprises: low-pass filter for detecting only the pilot signal by filtering a reproduced signal from a digital tape; band-pass filter for detecting synchronous signal of tracks A and B from said reproduced signal; analog/digital converter for converting output of said low-pass filter into digital data; controller detecting a level difference between the heads A and B as well as generating first to third control signals to control the digital pilot signal, after acknowledging a corresponding track by said synchronous signal; first register for storing a pilot crosstalk component of an adjacent track by the first control signal; second register for storing a pilot crosstalk component of another adjacent track by the second control signal; third register for storing an offset value according to a level difference between the heads A and B generated at the controller by said third control signal; adding means for compensating the offset value due to the level difference of pilot signal by operating outputs of said first to third registers; and tracking error-signal generator for controlling tracking by generating a PWM signal (2) according to the output of said adding means.
R. William Wray & Associates
Samsung Electronics Co. Ltd.
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