Frequency divider, frequency synthesizer and application circuit

A frequency divider comprising:

• a prescaler configured to generate a plurality of intermediate frequency signals having a same phase difference with respect to one another in response to an oscillation frequency signal, the prescaler operating at a first frequency, wherein the prescaler comprises:
• a first divider configured to divide the oscillation frequency signal with a fixed first frequency ratio to provide a first plurality of frequency signals having a same phase difference with respect to one another;
• a logic level converter configured to convert logic levels of the first plurality of frequency signals from a first level to a second level and thereby provide a second plurality of frequency signals having a same phase difference with respect to one another;
• and
• an overlap prevention circuit configured to prevent overlap of adjacent frequency signals in the plurality of second frequency signals and provide the plurality of intermediate frequency signals;
• and
• a plurality of modulus dividers commonly coupled to the prescaler and configured to respectively divide the plurality of intermediate frequency signals by respective ratios to provide a plurality of division frequency signals in response to a control signal, the plurality of modulus dividers operating at a second frequency less than the first frequency.