Parallel-RC Feedback and Transformer Noise-Canceling Low Noise Amplifiers for UWB Application

• Main Authors: He, Kuang-Chi, 何廣琪
• Other Authors: Tarng, Jenn-Hwan
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/85243959778871285401

碩士 === 國立交通大學 === 電信工程系所 === 97 === In this thesis, a parallel-RC feedback and a transformer noise-canceling low noise amplifier for ultra-wide-band applications are presented. These propose circuits are implemented by the TSMC 0.18-μm CMOS process. In our first design, the parallel-RC shunt feedback with a source inductance is proposed to obtain the broadband input matching and to reduce noise level effectively. The parallel-LC network at drain is drawn to further suppress the high-frequency noise and a low noise level is achieved. Measured results show that minimum noise figure is 2.5 dB. The power gain is 10.9-13.9 dB from 3.1 to 10.6 GHz. The input return loss is below －9.4 dB from 3.1 to 15 GHz. It consumes 14.4 mW from 1.4 V supply voltage and occupies an area of only 0.46 mm2. In our second design, a transformer input stage is proposed to achieve broadband noise cancellation and input matching with small chip area and low power consumption. Measured results show that minimum noise figure is 3.8 dB. The power gain is more than 10.2 dB from 0.7 to 11.5 GHz. The input return loss is below －10.1 dB from 3.1 to 13 GHz. It consumes 9.7 mW from 1.2 V supply voltage and occupies an area of only 0.47 mm2.