Collins, Diarmuid and Keady, Aidan and Szczepkowski, Grzegorz and Farrell, Ronan
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.
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
Conference or Workshop Item
||90nm; Low Power VCO; Reduced KVCO;
Sub−band Spacing Variation;
||Science & Engineering > Electronic Engineering
Dr. Ronan Farrell
||23 May 2012 14:41
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