| 摘要 |
<p>The control circuit calculates the periods of pulses generated by a take-up and a supply reel and controls the speed of reel motor using the sum of periods. The circuit comprises a transition detector for generating a first clock and a second clock signal at first and second transition point of FGT and FTS signal, a reel signal selector operated at every second period signal generation to select transition signals of FGT and FGS signal alternatively, a period sum controller for generating a first period signal according to the reel selection signal, a counter controller for generating a second period signal to count the first clock and the first clock period, a counter for generating period sum signal of FGT and FGS signal, and a register for transmitting the period sum signal to a PWM circuit.</p> |
