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The paper presents a sub-harmonic injection-locked oscillator which consists of a differential comparator and even stages of inverter chain. We demonstrate that the oscillator can injection-lock on to a 1/2 and 1/3 sub-harmonic of the free running frequency signal. The oscillator is designed in a 0.35 μm CMOS technology with a free running frequency of 950 MHz. The locking range is equal to 95 MHz and 42 MHz when the oscillator is locked at 475 MHz (1/2 sub-harmonic) and 316 MHz (1/3 sub-harmonic) respectively.
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on (Volume:2 )
Date of Conference: 27-29 June 2004