LOCKING SYSTEM AND METHOD THEREOF

• Main Authors: LIU, ZHEN, ZHANG, ZHAOLI, FAN, LIANG, LI, JIAN, JIA, YUTAO, LIU, YONGBO, ZHANG, HONGWEI
• Format: Patent
• Language: Chinese; English; French
• Published: 05.05.2011
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

A locking method and system thereof are provided by the present invention, wherein the method includes the following steps: first, the locking system performs phase discrimination and conversion processing for a frequency-divided external standard source input signal Fi and a frequency-divided local oven controlled crystal oscillator feedback output signal F0, to generate a clock signal clk and a signal sign which is used to denote the frequency relationship between the signal Fi and the signal F0, second, performs the filtering processing for the signal clk and sign, and then, performs the voltage controlled oscillation processing for a signal ahead and lag to implement the locking for the signal F0 and Fi, wherein, the signal ahead and lag are generated after the filtering processing, the signal ahead is used to denote the frequency of the signal F0 is lower than that of the signal Fi, and the signal lag is used to denote the frequency of the signal F0 is higher than that of the signal Fi. The present inven