| 摘要 |
<p>PURPOSE:To rapidly control of a tape speed by only a speed control servo even after shifting a mode by minimizing a time for performing any special processing to motor control voltage in addition to normal speed control at the time of shifting the mode. CONSTITUTION:An error between the period of the FG signal of a reel base driving motor 1 and a reference period is made by a speed error data arithmetic circuit 5 as speed error data, and the control data of N bit (N: integer) increasing gradually and then maintaining a constant value is outputted from the control data output circuit 7 of N bit. Then, a counted value of a counter 8 of M (M: integer, M>N) bit of free-run counting a clock, and the control data and the speed error data are compared by using comparators 9, 10 respectively and both the comparison outputs are supplied to an AND gate 11, and after the output of the AND gate 11 is smoothed by an LPF 12, is supplied to the reel driving motor 1.</p> |
