| 摘要 |
PURPOSE:To avoid skew and hue at variable speed reproduction from being fluctuated, by arranging the time bases of a reproducing signal of a main magnetic head and a sub-magnetic head placed closely in advance and outputting it with switching. CONSTITUTION:An output of a main magnetic head 1a and a sub-magnetic head 3a placed closely is given to a switching device 7 via reproducing amplifier circuits 4a, 4b, demodulating circuits 5a, 5b, AGC circuits 13a, 13b, ACC circuits 15a, 15b and mixing circuits 14a, 14b, and outputted from a terminal 8. The switching device 7 is switched by a flip-flop 11 to which a comparison output of envelope detecting circuits 9a, 9b and an output of synchronizing separation circuit are inputted. Variable delay circuits 17Y, 17C are inputted in the output path of the sub-magnetic head 3a and the time bases are arranged before being inputted to the switching device 7. Then, the skew and hue due to the switching is prevented from being fluctuated. |
