A Phase-Change Via-Reconfigurable CMOS LC VCO

作者：Wen Cheng Yuan^*; Slovin Gregory; Bain James A; Schlesinger T E; Pileggi Lawrence T; Paramesh Jeyanandh

来源：IEEE Transactions on Electron Devices, 2013, 60(12): 3979-3988.

DOI：10.1109/TED.2013.2283849

• CMOS
• GeTe
• phase-change (PC) material
• RF
• switch and LC voltage-controlled oscillator (VCO)

This paper demonstrates the efficacy of phasechange (PC) vias in reconfiguring RF front-end circuits for multiband/multi-standard operation. Constructed using two series-connected (SC) GeTe vias, a PC switch can be reversibly transformed between a high R-OFF state and a low R-ON state within 1 mu s. Using such PC switches to switch the inductor in a resonator, two LC voltage-controlled oscillators (VCOs) based on: 1) a SC and 2) a coupling-controlled (CC) resonator are developed. Designed and fabricated in 0.13-mu m CMOS in conjunction with an in-house GeTe process, the VCOs can switch their operating frequency over widely separated bands. Wide tuning ranges of 2.89-4.23/(4.93-7.79) and 4.80-8.53/(5.28-10.20) GHz were achieved in the off/on state for the SC/(CC) VCOs. The measured phase noise over the entire tuning range was lower than -103.4 and -102.7 dBc/Hz, at a 1-MHz offset frequency, respectively.

• 出版日期2013-12