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

Claim 0:
1. A circuit for expanding the lock range of injection-locked oscillators, comprising: N injection-locked oscillators and a lock detector, wherein N≥2; the lock detector comprises an alignment monitor, a clock selector, and N self-samplers; a pulse reference signal is inputted into the N injection-locked oscillators, and the output of each injection-locked oscillator is connected to the clock selector and the corresponding self-sampler; the self-samplers use the pulse reference signal to sample outputs of the N injection-locked oscillators and outputs sampling results to the alignment monitor; the alignment monitor monitors the sampling results of the self-samplers, determines locking conditions of the injection-locked oscillators and turns off unlocked oscillators among the N injection-locked oscillators; the clock selector selects a locked oscillator among the N injection-locked oscillators and transmits the output of the locked oscillator as a system clock.