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An all-digital phase-locked-loop with a robustness enhanced dual-mode DCO
KTH, School of Information and Communication Technology (ICT).
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2017 (English)In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 59, no 2, 312-315 p.Article in journal (Refereed) Published
Abstract [en]

An all-digital-phase-locked-loop (ADPLL) with a dual-mode Class-A/Class-C Digital-controlled-oscillator (DCO) is presented in this letter. During the start-up phase, the DCO operates in the Class-A mode with increasing tail current. A low-power amplitude-to-pulse-converter (APC) is proposed to detect the oscillating amplitude of the DCO. After the start-up, the DCO switches to the Class-C mode with reduced tail current, resulting in better phase noise and lower power consumption. The ADPLL with the proposed DCO is implemented in a 65-nm CMOS technology. The Class-C mode DCO exhibits a phase noise of −123.3 dBc/Hz at 1-MHz offset with a 2.7-GHz carrier frequency. Measured results show about a 2.9-dB phase noise improvement at 1-MHz offset among the tuning range of 2.5–2.9 GHz, compared to the Class-A DCO under the same power consumption. The figure-of-merit (FOM) and FOM including the tuning range (FOMT) of the DCO is 188.7 and 192.1, respectively.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017. Vol. 59, no 2, 312-315 p.
Keyword [en]
all-digital-phase-locked-loop, amplitude-to-pulse-converter, dual-mode DCO, phase noise, robust start-up, Electric power utilization, Locks (fasteners), Phase locked loops, All digital phase locked loop, Carrier frequency, Digital-controlled oscillator (DCO), Dual modes, Figure of merit (FOM), Lower-power consumption, Oscillating amplitudes, Pulse converter, C (programming language)
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-201949DOI: 10.1002/mop.30278ISI: 000393819400021ScopusID: 2-s2.0-85006964179OAI: oai:DiVA.org:kth-201949DiVA: diva2:1078800
Note

Funding text: This work has been supported by Science and Technology Commission of Shanghai Municipality (NO. 14510711500, NO. 13441902800), and by NSFC program (NO. 61571137).

QC 20170306

Available from: 2017-03-06 Created: 2017-03-06 Last updated: 2017-03-27Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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