A 10 GHz 56 fsrms-integrated-jitter and -247 dB FOM ring-VCO based injection-locked clock multiplier with a continuous frequency-tracking loop in 65 nm CMOS

Zheng, X and Lv, F. and Zhao, F. and Yue, S. and Zhang, C. and Wang, Z. and Li, F. and Jiang, H. and Wang, Z. (2017) A 10 GHz 56 fsrms-integrated-jitter and -247 dB FOM ring-VCO based injection-locked clock multiplier with a continuous frequency-tracking loop in 65 nm CMOS. In: 38th Annual Custom Integrated Circuits Conference, CICC 2017, 30 April - 3 May 2017, Austin, TX, USA.

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Item Type:Conference or Workshop contribution (Paper)
Item Status:Live Archive

Abstract

This paper presents a low jitter ring-VCO based injection-locked clock multiplier (RILCM) with a phase-shift detection based hybrid frequency tracking loop (FTL). A full-swing pseudo-differential delay cell (FS-PDDC) is proposed to lower the device noise to phase noise conversion. To obtain high operation speed, high detection accuracy, and low output disturbance, a compact timing-adjusted phase detector (TPD) tightly combining with a well-matched charge pump (CP) is designed. Additionally, a lock-loss detection and lock recovery (LLD-LR) scheme is devised to equip the RILCM with a similar lock-acquisition ability to conventional PLL, thus excluding the initial frequency setup aid and preventing potential lock loss. Implemented in 65 nm CMOS, the RILCM occupies an active area of 0.07 mm2 and consumes 59.4 mW at 10 GHz. The measured results show that it achieves 56.1 fs rms-jitter and -57.13 dBc spur level. The calculated figure-of-merit (FOM) is -247.3 dB, which is better than previous RILCMs and even comparable to those large-area LC-ILCMs. © 2017 IEEE.

Additional Information:Conference Code:129634
Keywords:Clocks, CMOS integrated circuits, Electric charge, Integrated circuit manufacture, Jitter, Locks (fasteners), Phase comparators, Variable frequency oscillators, Continuous frequency, Detection accuracy, Figure of merit (FOM), Frequency tracking, Initial frequency, Output disturbance, Phase shift detection, Pseudo differential, Frequency multiplying circuits
Divisions:College of Science > School of Computer Science
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ID Code:29190
Deposited On:02 Nov 2017 15:08

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