A Study of the Lock Range of Injection-Locked CMOS Active-Inductor Oscillators Using a Linear Control System Approach

作者：Zhou Yushi^*; Yuan Fei

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2011, 58(10): 627-631.

DOI：10.1109/TCSII.2011.2164154

• CMOS active inductors
• CMOS circuits and systems
• injection-locked oscillators

This brief investigates the lock range of injection-locked LC oscillators using a linear control system approach. It explores the intrinsic relation between the lock range of injection-locked LC oscillators and the injection-induced variation of the impedance of the LC tank. We show that injection-locked active-inductor LC oscillators exhibit a larger lock range, as compared with their passive counterparts. We further show that the large lock range of injection-locked active-inductor oscillators is due to both the low quality factor and the large injection-induced variation of the inductance of active inductors. These findings are validated using an injection-locked passive LC oscillator and an injection-locked active-inductor LC oscillator designed in IBM 0.13-mu m 1.2-V CMOS technology.

• 出版日期2011-10