| 摘要 |
Due to a phase-locked loop according to the invention, the phase shift is reduced as compared to the prior art. The reduction is achieved by a partly analogue and partly digital phase-locked loop intended for several reference signals, in which the phase shift of the output signal of the loop is reduced as follows. The output frequency of the loop is fixed (21) with a digital part e.g. at an average frequency which has prevailed for a certain period of time. The reference signals are changed (22), the signals to be compared are phased in (23) by means of phase selection, which is possible due to the higher frequency of the feedback signal, the operating point of the loop filter is set (24) and normal operation is resumed (25). |
