| 摘要 |
A tape transport speed control uses a speed controller supplied with packing density or digital bits per inch of recording medium and data rate or digital bits per second to compute the speed of the tape which would conform to these selected parameters by the speed being equal to the data rate divided by the packing density. The speed controller uses a combination of digital and analog circuits to produce a reference signal and a speed select signal for the tape transport speed control operation using a comparison between the reference signal and a tachometer signal to control the tape transport about the basic selected tape speed.
|
