Patent ID: 6989718
Filing Date: 2006-01-24
Classification: H03L

Abstract:
1. A phase locked loop system, comprising: a phase detector providing at least one phase detector output signal according to a frequency reference input and to a feedback signal; a charge pump coupled with the phase detector, the charge pump providing a charge pump output signal at a charge pump output terminal according to the at least one phase detector output signal; a loop filter coupled with the charge pump, the loop filter providing a tuning voltage output according to the charge pump output signal; a voltage controlled oscillator coupled with the loop filter, the voltage controlled oscillator providing a frequency output signal according to the tuning voltage output; a feedback circuit coupled with the voltage controlled oscillator and the phase detector, the feedback circuit providing the feedback signal according to the frequency output signal; and a control circuit coupled with the charge pump and the voltage controlled oscillator, the control circuit comprising: