Patent ID: 11967966
Assignee: ZHEJIANG UNIVERSITY
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method for expanding the lock range of injection-locked oscillators, comprising the following steps:
step 1, inputting a same pulse reference signal to N injection-locked oscillators with different free-running frequencies;
step 2, using the falling edge of the same pulse reference signal to sample outputs of the N injection-locked oscillators; based on the self-alignment characteristics of the injection-locked oscillators, the sampling result is a stable voltage when the corresponding injection-locked oscillator is locked, and the sampling result is an unstable voltage when the corresponding injection-locked oscillator is unlocked;
step 3, monitoring the sampling results of the N injection-locked oscillators by using an alignment monitor, determining whether the N injection-locked oscillators are locked or not according to the sampling results, and then turning off the unlocked injection-locked oscillators; and
step 4, selecting a locked oscillator among the N injection-locked oscillators and outputting a locked clock by a clock selector.