A 1V, 1mW, 4GHz Injection-Locked Oscillator for High-Performance Clocking

Abstract — Injection-locked clocking (ILC) has been proposed [1] to improve the skew and jitter performance while reducing the power consumption in multi-gigahertz clock distribution networks. This paper presents a new design of the injectionlocked oscillator (ILO) suitable for ILC applications. It uses a transformer to generate differential signals and then directly inject them into the ILO core. It also incorporates a switchedcapacitor array for frequency tuning and hence digital deskew in ILC. A 4GHz test chip was designed and fabricated in a 0.18um standard digital CMOS. It consists of four ILOs driven by a balanced H-tree. Each ILO consumes less than 1mW from a 1V power supply. 5-bit digital deskew achieves 55ps delay tuning range and 1.8ps resolution. Measurement shows that only 30fs cycle-to-cycle jitter degradation was introduced and no phase noise degradation at frequency offset up to 600kHz. I

準ミリ波・ミリ波領域における低位相雑音電圧制御発振器のLC共振器に関する研究

2017岡山県立大学大学