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This paper describes a multiband CMOS chip-set for indirect and direct conversion base station receivers. The chip set consists of a low-noise amplifier (LNA), and a down-converter which includes a passive resistive mixer and a local-oscillator balun. The 0.25– m CMOS receiver chip set, biased at 3 V, meets normal DCS1800, PCS1900, and Universal Mobile(More)
This paper investigates the advantages of using PMOS devices for passive resistive mixer design. The experimental results presented in this paper demonstrate that PMOS mixers offer the advantage of higher signal to noise ratio at very low output frequencies. The significantly lower 1/f noise more than compensates for the higher conversion loss on PMOS mixer(More)
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