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A 5th subharmonic, inverter-based injection locked oscillator with 72–83GHz locking range Host Publication: 2014 IEEE Radio Frequency Integrated Circuits Symposium (RFIC) Authors: Q. Shi, P. Wambacq, D. Guermandi and V. Giannini Publication Year: 2014 Number of Pages: 4
Abstract: This paper presents a 79GHz fifth subharmonicinjection locked oscillator (ILO). Compared to classical ILOswhich are based on the nonlinearity of coupling transistors, thiswork uses inverter chains for input pulse pre-shaping. Thanks tothe harmonic rich square wave, the new ILO combines linear andnonlinear mechanisms which together widen the locking range. Aprototype chip is fabricated in 28nm CMOS technology. A lockingrange from 72 to 83GHz is measured under DŽdBm input power.The power consumption of the inverter chain, the core circuit andthe output buffer is 9mA, 10mA and 9mA respectively. Besides, apeak detector is implemented to ensure the locked ILO operatesnear the free-running frequency where the output amplitude ishigher.
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