A Study of 2.4GHz Band-Pass Filter Designs Using Radio Frequency CMOS Active Inductors

• Main Authors: Yen-Ching Ho, 何彥慶
• Other Authors: Jenn-Tzer Yang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/37038240181842461132

碩士 === 明新科技大學 === 電子工程研究所 === 95 === In this thesis, a study of a band-pass filter with a RF (Radio Frequency) CMOS active inductor using TSMC 0.18 μm CMOS process is presented. Use the characteristics of the CMOS active inductor to implement a RF band-pass filter. The band-pass filter can obtain the characteristics of lower power dissipation, higher linearity and lower signal loss. In this band-pass filter design, the filter can be applied in the wireless communication for the Industry-Science -Medicine (ISM) bands. In this CMOS active inductor design, a capacitor is used to decrease the loss of the active inductor. Hence, the high Q active inductor can be obtained. The performance of this high Q active inductor has 4.431×106 of maximum Q-value, 4.4nH to 11.56nH inductance, and 2.064×10-5Ω of minimum equivalent loss in the 1GHz to 5GHz frequency range. The band-pass filter using the improved CMOS active inductor exhibits the output gain (S21) of -0.266dB, the input return loss (S11) of -38.534dB, the output return loss (S22) of -37.953dB, , the noise figure (NF) of 10.481dB, the 1-dB compression point (P1dB) of 4dBm, the third-order intercept point (IIP3) of -3.15dBm, and the 1.872mW power dissipation under 1.8V power-supply. The dimension of this circuit occupies 500×500 μm2.