Patent ID: 7095992

Claim:
A method for calibrating a phase locked loop (PLL), the method comprises: performing an open loop test on the PLL by: providing an optimal control input to a controlled oscillator (CO) of the PLL; determining rate of output oscillation of the CO based on the optimal control input; comparing the rate of the output oscillation with rate of an optimal output oscillation; when the comparing the rate of the output oscillation with rate of the optimal output oscillation is unfavorable, adjusting an oscillation point of the CO until the comparing the rate of the output oscillation with rate of an optimal output oscillation is favorable to produce an open-loop adjusted CO oscillation point; and performing a closed loop test of the PLL by: determining a closed-loop input control level of the CO at the open-loop adjusted CO oscillation point; comparing the closed-loop input control level with the optimal control input; and when the comparing the closed-loop input control level with the optimal control input is not favorable, adjusting the open-loop adjusted CO oscillation point until the comparing the closed-loop input control level with the optimal control input is favorable.