Quadrature Injection Locked Frequency Tripler with Wide Tuning Range and Low Quadrature Error for MM-Wave Applications

Abstract

This paper presents a quadrature injection locked oscillator as a frequency tripler to generate a 30GHz signal with 20% tuning range and low quadrature error by a phase calibration scheme. To enhance the locking range, a topology based upon dual injection to improve the injection efficiency is employed. The Quadrature Injection Locked Frequency Tripler (QILFT) implemented in 65nm CMOS process works at 27.3–33.3GHz with quadrature errors of 0.75° and 0.2dB, and consumes 21.6mW from a 1.2V supply.