Abstract: A dual VCO phase-locked loop in which one VCO forms part of a standard phase-locked loop, the VCO being controlled by a loop control voltage and its output being divided and compared with an input reference signal for maintaining lock. A second VCO is indirectly controlled by the loop control voltage and tracks the output of the first VCO within .+-.5% over combined variations in power supply voltage from 3.0 V to 3.6 V, in ambient temperature from 20.degree. C. to approximately 125.degree. C., and in manufacturing process variations over 5 process corners (typical, fast-fast, slow-slow, slow-fast and fast-slow). A control current is developed for the VCO forming part of the closed loop and is coupled to the second VCO using a current mirror. An offset current is combined at the second VCO with the coupled control current. The offset current is intentionally made a compensating function of the variations in power supply voltage, ambient temperature and manufacturing process.