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A 0-dB IL 2140±30 MHz bandpass filter utilizing Q-enhanced spiral inductors in standard CMOS

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2 Author(s)
Soorapanth, T. ; Center for Integrated Syst., Stanford Univ., CA, USA ; Wong, S.S.

A 3-pole Chebyshev bandpass filter, that employs on-chip passive elements with Q-enhancement technique, achieves an insertion loss of 0 dB and a passband of 60 MHz around a center frequency of 2140 MHz. The Q-enhancement technique is based on coupled-inductor negative resistance generator. In contrast to conventional negative resistance generator, this technique compensates resonator loss without introducing distortion in the filter response in the passband. Fabricated in a 0.25-μm CMOS, the filter consumes 7 mA from a 2.5-V supply. The filter occupies an area of 1.3 mm×2.7 mm

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:37 ,  Issue: 5 )