Collins, Diarmuid and Keady, Aidan and Farrell, Ronan (2010) Fast frequency calibration of VCO's in phase-locked loops. In: IET Irish Signals and Systems Conference (ISSC 2010). IET, pp. 147-151. ISBN 9781849192521

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Abstract

This paper presents a novel technique to achieve fast calibration of the voltage-controlled oscillator (VCO) into the optimum subband of operation. The proposed technique is pre-dominantly digital thus exhibiting low power/area requirements, in addition to greatly reduced calibration times, suitable for application in lower technology nodes. To verify the proposed technique the VCO and corresponding calibration circuitry is modelled as part of a charge-pump phase locked loop (CP-PLL) in UMC's 90nm process. VCO operation is split into 16 different subbands (i.e. 4-bit calibration) with each subband exhibiting a gain (KVCO) of ≈ 50MHz/V to achieve an overall tuning range of ≈ 10%. Through application of the proposed technique, calibration into the optimum subband of VCO operation is shown to occur in minimal time.

Item Type:	Book Section
Keywords:	Voltage-controlled oscillator (VCO); calibration; subband; phase-locked loop (PLL);
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Institute of Microelectronics and Wireless Systems
Item ID:	9642
Identification Number:	https://doi.org/10.1049/cp.2010.0503
Depositing User:	Ronan Farrell
Date Deposited:	04 Jul 2018 15:48
Publisher:	IET
Refereed:	Yes
URI:	https://ieeexplore.ieee.org
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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