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Author Mazzanti, A. ♦ Larcher, L. ♦ Svelto, F.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2005
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Frequency conversion ♦ Bandwidth ♦ Q factor ♦ Injection-locked oscillators ♦ Signal generators ♦ Capacitance ♦ Prototypes ♦ Performance evaluation ♦ Inductors ♦ CMOS technology
Abstract A regenerative circuit based on an LC-tank balanced divider is proposed in this paper for quadrature LO signal generation. For given tank quality factor, it provides larger operation bandwidth and improved quadrature accuracy when compared with conventional injection locked frequency dividers. The operation bandwidth can be adjusted dynamically simply regulating the biasing current. Experimental results, carried on 0.18 /spl mu/m CMOS prototypes, show 42% range with a tank quality factor of 13.5 while driving 1.5pF output capacitance. At the band edge, biasing current is 8mA. Quadrature accuracy has been verified through the achievable image rejection of a purposely developed single side band up-converter. Measurements, performed on five samples, show a minimum image rejection of 44dB.
Description Author affiliation: DII, Universita di Modena e Reggio Emilia, Italy (Mazzanti, A.)
ISBN 0780390237
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-09-21
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 174.77 kB
Page Count 4
Starting Page 575
Ending Page 578


Source: IEEE Xplore Digital Library