| 摘要 |
Phase or frequency demodulator comprising an automatic gain control circuit (100), a phase-locked loop (200) and, optionally, a shaping circuit (300) for shaping the output signal of the loop. A feedback path is provided between the output of the loop, or of the signal-shaping circuit, and the automatic gain control circuit, via an automatic noise control circuit (400) for producing an analog signal, the amplitude of which is proportional to the rate at which the loop is temporarily disabled. |
