A Single-PLL UWB Frequency Synthesizer Using Multiphase Coupled Ring Oscillator and Current-Reused Multiplier

Author

Chang, Jung-Yu ; Fan, Che-Wei ; Liang, Che-Fu ; Liu, Shen-Iuan

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei

Volume

56

Issue

2

fYear

2009

Firstpage

107

Lastpage

111

Abstract

A single phase-locked loop (PLL) frequency synthesizer for a mode-1 multiband orthogonal frequency-division multiplexing (MB-OFDM) ultrawideband (UWB) system is realized in 0.13-mum CMOS. A current-reused multiply-by-1.5 circuit and a multiphase coupled ring oscillator are adopted to reduce the power consumption. For a 4.488-GHz signal, the measured image sideband is -40 dBc. The measured switching time from 3.342 to 4.488 GHz is 1.5 ns. The area is 0.85times0.9 mm² and the power is 31.2 mW for a 1.2-V supply voltage.

Keywords

OFDM modulation; frequency synthesizers; phase locked loops; phase locked oscillators; ultra wideband communication; current-reused multiplier; multiband orthogonal frequency-division multiplexing; multiphase coupled ring oscillator; power consumption; single phase-locked frequency synthesizer; single-PLL UWB frequency synthesizer; ultrawideband system; Current reused; multiply-by-1.5 circuit; phase-locked loop (PLL); ring oscillator; ultrawideband (UWB);

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2008.2010181

Filename

4785200