| 摘要 |
<p>A speed control circuit for a motor (28) driving a constant linear speed type of disc (2) for driving and controlling the motor (28) by a compared phase error output together with the start of the motor (28), by phase comparison of a data signal reproduced from the disc (2), or a demodulated clock signal synchronized with the data signal, with a reference frequency signal, and driving and controlling the disc (2) at a constant linear speed.</p> |
