Patent ID: 6018273
Filing Date: 2000-01-25
Classification: H03L

Abstract:
An apparatus comprising:a first and second voltage-controlled oscillator with start/stop input and control signal input, the control signal input controlling the frequency of each voltage-controlled oscillator output;a feedback circuit connected to the output of the first voltage-controlled oscillator for producing a control signal for the first and second voltage-controlled oscillators, the feedback circuit including a reference frequency input; andcircuitry attached to the outputs of the first and second voltage-controlled oscillators and to a sync pulse line and producing outputs connected to the start/stop inputs of the first and second voltage-controlled oscillators, the circuitry adapted to use the sync pulse to turn on the second voltage-controlled oscillator for a timing interval and to use the output of the second voltage-controlled oscillator to turn on the first-voltage-controlled oscillator after the timing interval so that the first voltage-controlled oscillator is synchronized with sync pulses on the sync pulse line.