Title :
A 5th subharmonic, inverter-based injection locked oscillator with 72–83GHz locking range
Author :
Qixian Shi ; Guermandi, D. ; Giannini, V. ; Wambacq, Piet
Author_Institution :
Dept. of Electron. & Inf., Vrije Univ. Brussel, Brussels, Belgium
Abstract :
This paper presents a 79GHz fifth sub-harmonic injection locked oscillator (ILO). Compared to classical ILOs which are based on the nonlinearity of coupling transistors, this work uses inverter chains for input pulse pre-shaping. Thanks to the harmonic rich square wave, the new ILO combines linear and nonlinear mechanisms which widen the locking range. A prototype chip is fabricated in 28nm CMOS technology. A locking range from 72 to 83GHz is measured under -2dBm input power. The total power consumption is 25mW. Besides, a peak detector is implemented to ensure the locked ILO operates near the free-running frequency where the output amplitude is higher.
Keywords :
CMOS analogue integrated circuits; field effect MIMIC; injection locked oscillators; invertors; millimetre wave oscillators; peak detectors; 5th subharmonic inverter-based injection locked oscillator; CMOS technology; ILO; coupling transistor; free-running frequency; frequency 72 GHz to 83 GHz; harmonic rich square wave; input pulse preshaping; peak detector; power 25 mW; size 28 nm; CMOS integrated circuits; Couplings; Detectors; Frequency conversion; Harmonic analysis; Inverters; Transistors; Injection-locked oscillators; Inverters; Millimeter wave integrated circuits;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2014 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
978-1-4799-3862-9
DOI :
10.1109/RFIC.2014.6851692
