APPARATUS FOR PVT VARIATION CALIBRATION OF RING OSC BASED ON INJECTION LOCKING SYSTEM AND THE METHOD THEREOF

摘要

An apparatus and method for polarization correction of an injection locking based ring oscillator are disclosed. A first ring-shaped VCO that receives an injection pulse of the injection pulse generator and outputs a predetermined frequency; and a second ring-shaped VCO that receives a reference pulse generated by the reference clock generator and generates an injection pulse, 2, a reference clock generated by the reference clock generator, and an output frequency (Fvco) of the second VCO, and performs digital correction to input the first and second VCO control voltages Circuit, it is possible to generate a stable multiplied frequency with respect to the PVT change.