High Quality Content by WIKIPEDIA articles! A PLL multibit or Multibit PLL is a phase-locked loop (PLL) which uses more of the information available in the PLL, to achieve improved performance. Unibit PLLs use only one bit of each counter`s output bus, the most significant bit (MSB) to measure the phase, whereas Multibit PLLs use more bits . PLLs are an essential component in telecommunications. The Multibit PLL achieves improved efficiency and performance: better utilization of the frequency spectrum, to serve more users at a higher Quality of service (QoS), reduced RF transmit power, and reduced power consumption in cellular phones and other wireless devices.