The DPLL is a digital loop filter/controller designed to be used in conjunction with Silicon Creations Fractional-N PLLs. The resulting dual-loop PLL can attenuate jitter in extremely noisy reference ...

Now, we know what you’re thinking — he must have used some kind of PLL to give an electromagnetic “kick” to the bob to trim the pendulum’s period. Good guess on the PLL, but the trimming ...

A Phase-Frequency Detector (PFD, including a charge pump) compares a divided version of the VCO clock with a divided version of the PLL input. The PFD outputs are filtered by the loop filter and ...