Device of controlling head-drum angle and method therefor

摘要

A video cassette recorder, in which the head-drum angle is controlled by a control voltage which varies according to the tape speed detected from the frequency or a capstan motor applied by a frequency detecting portion at a first stage. Then, based upon the Fuzzy theory, the video head of head-drum can be maintained at a constant angle with the pitch (P) of a video tape independent of the tape speed by reproducing the control voltage by means of a detected membership function detected according to the gain difference (G) coming from a gain detecting portion.