Integrated Low Phase Noise Colpitts Quadrature Voltage Controlled Oscillator and Mixer With Charge-Injection for Wimax Communications and Wireless Networking Application

被引:0
作者
Lai, Wen-Cheng [1 ]
Huang, Jhin-Fang [1 ]
Lin, Wei-Jian [1 ]
Kao, Fan-Tsai [1 ]
机构
[1] Natl Taiwan Univ Sci & Technol, Dept Elect Engn, Taipei, Taiwan
来源
2014 9TH INTERNATIONAL CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA (CHINACOM) | 2014年
关键词
QVCO; VCO; voltage-controlled oscillator; WiMAX; Colpitts; Mixer with charge-injection;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A fully integrated, 5.6 GHz low-phase noise Colpitts quadrature voltage-controlled oscillator (QVCO) and broadband CMOS double-balance mixer are presented. This QVCO is a complementary cross-coupled voltage-controlled Colpitts oscillator with a 3-bit switched capacitor array parallel to the inductor to form LC resonant tank. Without buffer circuits, measured results achieve a tunable frequency range from 4.81 GHz to 5.75 GHz, corresponding to 17.8 %, a phase noise of -121 dBc/Hz at 1 MHz offset frequency from 5.64 GHz, while the QVCO draws 3.8 mA current and 6.84 mW consumption respectively. Including pads, the VCO chip area is 1.046 mm(2) (1.35 mmx0.775 mm). The output power is -10.04 dBm with 50-W termination at the frequency of 5.64 GHz and the calculated FOM (figure of merit) is -187.7 dBc/Hz. Measurement of the CMOS mixer with charge-injection (1.120 by 1.030 mm(2)) is performed in the 5.6 GHz, input return loss is higher than 8.5 dB. Two chips are implemented in TSMC 0.18 um CMOS technology with 1.8 V supply voltage for Wimax communications and wireless networking application.
引用
收藏
页码:106 / 109
页数:4
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