ANORDNUNG ZUR EINREGELUNG DER SPURLAGE BEI DER WIEDERGABE MAGNETISCH AUFGEZEICHNETER FREQUENZMODULIERTER SIGNALE.

摘要

A controllable digital circuit and d-a converter generate the control voltage for the head from the positional error signal. The control signal causes the heads to move continuously aperiodically at right angles to the desired track. A gate, differential amplifier and two sample-and-hold circuits connected to the control input of the digital circuit compare consecutive amplitudes of the FM signal at frequencies assigned to the line pulses in order to obtain the heads' deviation from the desired track.