DIGITAL PHASE-LOCKED LOOP WITH A RAPID TRANSIENT RESPONSE

摘要

The invention relates to a digital control loop comprising a digital controlled oscillator (4) for generating an output frequency. Said loop comprises a digital binary or ternary phase detector (1) for detecting the phase difference between an input frequency and a feedback frequency that is dependent on the output frequency of the oscillator (4). The digital oscillator (4) is controlled by both the phase detector (1) and a digital counter element (21), which determines the difference between signal flanks that occur in the feedback frequency and signal flanks that occur in the input frequency.