標題: 2.4-GHz Tunable Miniature CMOS Active Bandpass Filter With Two Transmission Zeros Using Lumped Stepped-Impedance Ring Resonator
作者: Hsiao, Yu-Chih
Meng, Chinchun
Chien, Hsieh-Hsiu Chang
Huang, Guo-Wei
電機工程學系
Department of Electrical and Computer Engineering
關鍵字: Active bandpass filter;active inductor;ring resonator;transmission zero;CMOS
公開日期: 1-Jan-2018
摘要: This paper demonstrates a small-size 2.4-GHz CMOS active bandpass filter with two transmission zeros using a lumped stepped-impedance ring resonator. To obtain low insertion loss and small size, four high-Q active inductors using 0.18 gm CMOS transistors only are employed in the design. The measured insertion loss is 2.9-dB at 2.4 GHz center frequency with two transmission zeros located at 2.1 GHz and 3.1 GHz, respectively. By tuning the bias currents of active inductors, the center frequency has 1.4 GHz tuning range and the 1-dB bandwidth can be adjusted in the range of 190 MHz to 260 MHz. The demonstrated active filter occupies a small chip area of 0.47 mm x 0.33 mm excluding I/O pads and has 24 dB noise figure. Thus, an active filter with a preceding two-stage common-source LNA for suppression of noise of the active filter is also demonstrated and the resulting LNA + active filter has 6 dB noise figure. The power consumption of the active filter core and the LNA core is 9 mW and 7.2 mW, respectively.
URI: http://hdl.handle.net/11536/150853
ISSN: 0149-645X
期刊: 2018 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM - IMS
起始頁: 405
結束頁: 408
Appears in Collections:Conferences Paper