Phase locked loop

摘要: A hybrid phase locked loop employs both analog and digital circuitry. to converter (DAC) provides a current output signal in conjunction with controlled oscillator (ICO). The the circuitry, among other reasons, assist generating an optimal feedback frequency before of is closed. intelligently appropriate switching strategically placed portions ensure stable operation once baseline components certain embodiments invention. These are those whose component values may vary significantly as function operating conditions, environmental perturbations, which have relatively relaxed tolerances/precisions. present implementation loop, described invention, capable using wide variety having tolerances/precisions, including intrinsic devices such MOSFET capacitors. Such employed electronic where low cost rigid design constraint; invention for applications.