| 摘要 |
<p>A regenerating device for regenerating a signal from a composite input signal, provided with a phase-locked loop comprising a first phase comparison circuit 1, a first low-pass filter 2 connected to the output thereof and a controlled oscillator 3. The control input of said oscillator 3 is connected to the output of the low-pass filter 2 while its quadrature output 3a is connected to one input of the phase comparison circuit 1. The input of the phase comparison circuit 1 forms the input of the regenerating device and the in-phase output of the oscillator 3 the output. Furthermore a second phase comparison circuit 4 and a second low-pass filter 5 connected thereto are provided, which correspond to the first phase comparison circuit and the first low-pass filter respectively. The input of the phase-locked loop and the in-phase output 3b of the controlled oscillator 3 are connected to the inputs of the phase comparison circuit 4. An AGC amplifier 7 fed back to its control input via a feedback path is connected to the output of the second low-pass filter 5. The signal fed back is fed to the control input of a gain-controllable amplifier 6 which is included in the phase-locked loop and which correspond to the AGC amplifier 7.</p> |
