A 6-9 GHz 5-band CMOS synthesizer for MB-OFDM UWB

• 作 者: 陈普锋 李志强 王小松 张海英 叶甜春
• 机 构: Institute of Microelectronics,Chinese Academy of Sciences,
• 出 处: 半导体学报
• 发表日期: 2010年07期
• 关键词: synthesizer wideband mixer quadrature consuming switching bands tuning rejection

An ultra-wideband frequency synthesizer is designed to generate carrier frequencies for 5 bands distributed from 6 to 9 GHz with less than 3 ns switching time.It incorporates two phase-locked loops and one single-sideband (SSB) mixer.A 2-to-1 multiplexer with high linearity is proposed.A modified wideband SSB mixer,quadrature VCO, and layout techniques are also employed.The synthesizer is fabricated in a 0.18μm CMOS process and operates at 1.5-1.8 V while consuming 40 mA current.The measured phase noise is -128 dBc/Hz at 10 MHz offset,and the sideband rejection is -22 dBc at 7.656 GHz.

An ultra-wideband frequency synthesizer is designed to generate carrier frequencies for 5 bands distributed from 6 to 9 GHz with less than 3 ns switching time. It incorporates two phase-locked loops and one single-sideband (SSB) mixer. A 2-to -1 multiplexer with high linearity is proposed. A modified wideband SSB mixer, quadrature VCO, and layout techniques are also employed. The synthesizer is fabricated in a 0.18 μm CMOS process and operates at 1.5-1.8 V while consuming 40 mA current. The phase noise is -128 dBc / Hz at 10 MHz offset, and the sideband rejection is -22 dBc at 7.656 GHz.