This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Exor and FF comparator for NRZ data. Exor and FF comparator are the essential parts of phase comparator for NRZ data The figure introduces the principles but does not include the circuitry for the balancing pulses to have indifferent output in case of no transitions en Adrignola CommonsHelper BORGATO Pierandrea en English BORGATO