ATF CONTROLLER FOR DIGITAL AUDIO TAPE RECORDER AND/OR PLAYER

摘要

The ATF controller 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 pilot signals; controller detecting a level difference between the digital pilot signals as well as generating first to third control signals to control storage of components of the digital pilot signal and an offset value, 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 the offset value developed according to a level difference between the digital pilot signals; an adder for compensation for ATF error by combining the outputs of said first to third registers; and tracking error-signal generator for controlling tracking by generating a PWM signal according to the output of the adder.