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Q-enhanced LC bandpass filters for integrated wireless applications

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3 Author(s)
Kuhn, W.B. ; Dept. of Electr. & Comput. Eng., Kansas State Univ., Manhattan, KS, USA ; Yanduru, N.K. ; Wyszynski, A.S.

Q-enhanced LC filter technology offers an alternative to the use of direct conversion techniques for implementing fully integrated receivers. Design and performance issues for QE LC filters are discussed and a fully integrated 850 MHz, two-pole, bandpass filter with an 18 MHz 3 dB bandwidth is reported. The prototype design is implemented in a standard 0.8 μm CMOS process and achieves a rejection of over 50 dB at 100 MHz offset, an in-band dynamic range of 75 (90) dB when used in a system with a 1 MHz (30 kHz) final IF bandwidth, and a third-order intercept point that exceeds +25 dBm at an 80 MHz offset from the passband center,

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:46 ,  Issue: 12 )