2010
DOI: 10.1007/s10470-010-9534-0
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A UHF current-mode continuous-time band-pass delta sigma modulator using fully balanced active inductor

Abstract: This paper introduces a 2 GHz continuous-time (CT) fourth order current-mode (CM) band-pass 0.18 lm CMOS delta sigma modulator (DSM) utilizing a fully balanced active inductor. The proposed active inductor takes advantage of positive feedback topology and features accurate loss compensation as well as independent tunability of quality factor and resonant frequency. Based on this active inductor, a CM Ultra High Frequency (UHF) resonator is also proposed, exhibiting a very small on-chip area. Moreover, a high s… Show more

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