This paper proposes a novel, all synthesized, Injection Locked Ring Oscillator (ILRO). It employs a digitally tunable oscillator and a pulse injection locking technique. The frequency tuning range of the free running oscillator is from 210 MHz to 1.8 GHz with a 1.1 volt power supply. The tuning range from 1.0 to 1.8 GHz can be achieved with 215 tuning steps with a maximum step size of 11.2 MHz, that is well within the worst case 75 MHz (3rd sub-harmonic) and 32 MHz (9th sub-harmonic) locking range of the oscillator. The design occupies 127.5 um by 31.5 um of chip area and is implemented in TSMC's 65-nm CMOS technology. For 3rd harmonic injection locking, the ILRO's RMS jitter is 192.7 fs (1 KHz to 40 MHz) with a phase noise of -130.9 dBc/Hz at 1 MHz offset from the 1.62 GHz carrier while consuming 7.15 mW of power.

Additional Metadata
Keywords low phase noise, pulse injection locking technique, synthesized digitally controlled ring oscillator
Persistent URL dx.doi.org/10.1109/APMC.2017.8251691
Conference 2017 IEEE Asia Pacific Microwave Conference, APMC 2017
Citation
Li, M. (Mingze), Mason, R, & Abou-El-Kheir, N.T. (Nahla T.). (2018). A fully synthesized injection locked ring oscillator based on a pulse injection locking technique. In Asia-Pacific Microwave Conference Proceedings, APMC (pp. 1265–1268). doi:10.1109/APMC.2017.8251691