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A 90nm, Low Power VCO with Reduced KVCO and Sub−band Spacing Variation

Collins, Diarmuid and Keady, Aidan and Szczepkowski, Grzegorz and Farrell, Ronan (2011) A 90nm, Low Power VCO with Reduced KVCO and Sub−band Spacing Variation. In: 9th IEEE International NEWCAS Conference, 26th-29th June, 2011, Bordeaux, France.

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Abstract

In this paper we present the design of a low power VCO with reduced variations in VCO gain (KVCO) and subband spacing resolution (fres). The proposed VCO is designed using a 90nm CMOS process to cover a tuning range of 23%. Variations in KVCO and fres are reduced by factors of 6 and 17 respectively over a conventional sub-banded VCO, designed using the same process, to meet the same tuning range. This makes the proposed VCO more suited to stable PLL operation with its reduced KVCO requirements resulting in an improvement in phase noise performance over the conventional VCO by 2 dB. Due to the reduced loading on the VCO tank achieved by the presented design, power consumption is kept extremely low at 850 μW from a 1 V supply

Item Type: Conference or Workshop Item (Paper)
Keywords: 90nm; Low Power VCO; Reduced KVCO; Sub−band Spacing Variation;
Subjects: Science & Engineering > Electronic Engineering
Item ID: 3676
Depositing User: Dr. Ronan Farrell
Date Deposited: 23 May 2012 14:41
Refereed: Yes
URI:

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