brief introduction: Introduction:A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is related to the phase of an input signal. While there are several differing types, it is easy to initially visualize as an electronic circuit consisting of a variable frequency oscillator and a phase detector. A Phased Lock Loop (PLL) is a control system that generates an output signal by aligning the phase of an incoming signal to that of the output signal. The key buildin