| 摘要 |
<p>The circuit is for the recovery of the carrier from a digital transmission system having n changes of phase. The circuit includes a phase lock loop in which is provided a phase comparator to whose first input is applied the received signal multiplied in frequency by n. The second input of the comparator is connected to the output of an oscillator controlled by elastic surface waves. The control input is connected to the output of the comparator and the output signal is connected to input of a frequency divider, dividing by n, which produces the recovered carrier signal.</p> |
