Ultra Low Voltage QVCO Circuit Design for Wi-Fi and LTE Frequency Bands

• Main Authors: Li, Wei-Jhih, 李偉銍
• Other Authors: Hsu, Meng-Ting
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/a7p2f4

博士 === 國立雲林科技大學 === 電子工程系 === 105 === There is great interest in the development of low power, low cost CMOS technique for wireless transceiver front-end. The major purpose of this thesis is to challenge fully integrated voltage controlled oscillators with excellent performance. The chip fabrication of VCO circuit is made by TSMC 0.18um CMOS process. Finally, the efficiency of the circuit was demonstrated by measurement. The first chip is the research for application in Ultra low voltage VCO Circuit Design of Quasi Current-Reused Topology Using Transformer Feedback and Double Body Biasing Technique for Wi-Fi Frequency Band. The measured results exhibited the output spectrum of 2.48GHz, and frequency offset of 1MHz phase noise is -117dBc/Hz and the power dissipation of the core circuit is 0.156 mW under 0.32V supply voltage. The tuning range of the circuit is (2.38GHz~2.69GHz), and can reach FOM value of -193dB. The second chip is the research for application in Ultra low voltage QVCO Circuit Design of Quasi Current-Reused Topology Using Transformer Feedback and Double Body Biasing Technique for LTE Frequency Band . The measured results exhibited the output spectrum of 2.52 GHz, and frequency offset of 1MHz phase noise is -113dBc/Hz and the power dissipation of the core circuit is 0.26 mW under 0.29V supply voltage. The tuning range of the circuit is 10% (2.5GHz~2.76GHz)，and can reach FOM value of -187 dB. Keywords：Voltage Controlled Oscillator、Quadrature Voltage Controlled Oscillator、WiFi band、LTE band、Low phase noise、Ultra Low Voltage.