N. Testi, R. Berenguer, Xuejun Zhang, Sara Munoz, Yang Xu
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This paper presents a 2.4GHz two-stage Q-enhanced 4th-order active band-pass filter with 72dB variable gain and 12MHz 3-dB bandwidth. The center frequency of the filter can be tuned from 2.35GHz to 2.48GHz with a frequency step of 0.4MHz. An RF linearization technique is proposed to enhance the dynamic range (DR) to 100dB, and a robust Q of 400 is achieved for each of the two filter stages allowing RF channel selection. An EM isolation structure is implemented to reduce the mutual coupling between the two inductors to -76dB. This RF BPF is fabricated in 55nm CMOS technology and consumes only 7.8mW.
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