A wideband frequency synthesizer for a receiver application at multiple frequencies

An integer-N frequency synthesizer for a receiver application at multiple frequencies was implemented in 0.18μm 1P6M CMOS technology. The synthesizer generates 2.57 GHz, 2.52 GHz, 2.4 GHz and 2.25 GHz local signals for the receiver. A wide-range voltage-controlled oscillator （VCO） based on a reconfi...

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Bibliographic Details
Published inJournal of semiconductors Vol. 31; no. 3; pp. 80 - 84
Main Author 王小松 黄水龙 陈普锋 雷牡敏 李志强 张海英
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.03.2010
Subjects
多频率
宽带
应用
开关电容阵列
接收机
测量范围
电压控制振荡器
频率合成器
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ISSN1674-4926
DOI10.1088/1674-4926/31/3/035003

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Summary:An integer-N frequency synthesizer for a receiver application at multiple frequencies was implemented in 0.18μm 1P6M CMOS technology. The synthesizer generates 2.57 GHz, 2.52 GHz, 2.4 GHz and 2.25 GHz local signals for the receiver. A wide-range voltage-controlled oscillator （VCO） based on a reconfigurable LC tank with a binaryweighted switched capacitor array and a switched inductor array is employed to cover the desired frequencies with a sufficient margin. The measured tuning range of the VCO is from 1.76 to 2.59 GHz. From the carriers of 2.57 GHz, 2.52 GHz, 2.4 GHz and 2.25 GHz, the measured phase noises are -122.13 dBc/Hz, -122.19 dBc/Hz, -121.8 dBc/Hz and -121.05 dBc/Hz, at 1 MHz offset, respectively. Their in-band phase noises are -80.09 dBc/Hz, -80.29 dBc/Hz, -83.05 dBc/Hz and -86.38 dBc/Hz, respectively. The frequency synthesizer including buffers consumes a total power of 70 mW from a 2 V power supply. The chip size is 1.5 × 1 mm2.
Bibliography:MOS
TN74
phase locked loop
wideband
multiple frequencies
11-5781/TN
frequency synthesizer
P228
MOS; phase locked loop; frequency synthesizer; multiple frequencies; wideband; phase noise
phase noise
ISSN:1674-4926
DOI:10.1088/1674-4926/31/3/035003