BACKGROUND

Phase locked loops (PLLs) are commonly used in microcontrollers, demodulators, oscillators, communication systems, or the like. A PLL produces an output signal having a phase that is correlated to the phase of a received input signal. A frequency divider is a circuit in a PLL that receives an input signal having a first frequency, and produces an output signal having a second frequency that is a divisible factor of the first frequency.

