Research on 3-5-GHz Transformer Based CMOS RFICs For UWB Receiver Applications

• Main Authors: Ji-Ting Lai, 賴季霆
• Other Authors: Huey-Ru Chuang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/71572368357785617430

碩士 === 國立成功大學 === 電腦與通信工程研究所 === 95 === This thesis presents the research on applications of CMOS RFICs for UWB receiver。In the first part is the introduction of transformers, next part is two transformer based RFICs. They are a transformer based low voltage high isolation 3-5-GHz Gilber-type mixer and a transformer based low voltage 3-5-GHz front end for UWB receiver, respectively. All of the RFICs is in a TSMC 0.18 μm 1P6M CMOS process. Expect the TRSW in the appendix is on-wafer measurement , the others are measured on FR4-PCB test board. The transformer based low voltage high isolation 3-5-GHz Gilber-type mixer used a transformer to isolated the transconductance stage and switch stage in order to achieve low voltage operation and high isolation. The chip has been measured at supply voltage of 1 V. Conversion gain is 0.8–4.4 dB, isolation of LO-RF is 36.5–46.4 dB, isolation of LO-IF is 18–23.5 dB, isolation of RF-IF is 22-26.2 dB, input P1dB is -7.8–-0.8 dBm, input IP3 is -10.8–-9.75 dBm. The transformer based low voltage 3-5-GHz front end for UWB receive is include the transformer-based mixer introduced previously, a transformer-based low noise amplifier and a transformer-type balun that transforms the single end output signal of low noise amplifier into differential end signal. This chip is work at MB–OFDM band group A, the measurement result show the conversion gain is 4.1-9.3 dB at 3.168-3.696 GHz, 6.6-11.8 dB at 3.696-4.224 GHz, 7.8-10.9 dB at 4.224-4.752 GHz; the noise is 9.2-16.3 dB at 3.168-3.696 GHz, 11.2-18.4 dB at 3.696-4.224 GHz, 9.4-17.3 dB at 4.224-4.752 GHz, input P1dB is -18–-13 dBm, input IP3 is -10.5–-5.8 dBm.