The Wide band PLL is a phase-locked loop frequency synthesizer (PLL) with integer-N/fractional-N modes based on fully integrated wide band LC-VCO with range from 3GHz to 6GHz with good phase noise performance. The Wide band PLL work with reference frequency from 5MHz to 50MHz or external signal source with frequency up to 500 MHz. Phase-frequency divider compare frequency can be equal or 2,3,4...63 times lower than reference. VCO frequency N-divider has rogrammable coefficient of division with step 1 in range 4 to 2047 modulated with 4-order 24bit DSM. Phase-frequency detector has built-in lock detector circuit. Charge pump scheme with ADC and adjustable output current allow compensation VCO gain variation within band and keep loop parameters constant. Integrated low-pass loop filter has adjustable values of resistance and capacitance for tune loop and get best phase-noise performance.
The PLL is designed using TSMC 65nm CRN65LP technology.