Patent ID: 8537952

Claim:
A method of generating a signal having a desired frequency from a reference signal, the method comprising: providing the reference signal to both a phase detector and a frequency detector; generating a first signal that includes a first pulse synchronized with one of i) each rising edge of an output of an N-divider or ii) each falling edge of the output of the N-divider, the first pulse having a first pulse width determined by a first delay circuit; generating a second signal that includes a second pulse synchronized with the other one of i) each rising edge of the output of the N-divider or ii) each falling edge of the output of the N-divider, the second pulse having a second pulse width determined by a second delay circuit, the first and second pulse widths being of equal value, wherein the rising edge of the first pulse leads the falling edge of the second pulse by a pulse width of the output of the N-divider; providing the first signal to both the phase detector and the frequency detector; providing the second signal to both the phase detector and the frequency detector; controlling a first charge pump with an output of the phase detector; controlling a second charge pump with an output of the frequency detector; coupling a loop filter to the first charge pump and the second charge pump; and controlling a voltage controlled oscillator with an output of the loop filter to generate the signal having the desired frequency.