University of Macau

Fujian Lin

Rui Paulo Da Silva Martins

Pui-In Mak

A single-ended-input current-reuse wideband receiver comprising (1) a stacked Radio Frequency to Baseband (RF-to-BB) front-end with an 8-path active mixer realizing RF amplification, harmonic-recombination (HR) down-conversion, and BB filtering in the current domain for better linearity and power efficiency; (2) a feedforward 8-path passive mixer enabling LO-defined input impedance matching without external components, while offering frequency-translated bandpass filtering and noise cancelling; (3) a single-MOS pole-zero lowpass filter (LPF) permitting both RF and BB filtering at low voltage headroom consumption, while easing the tradeoff between the in-/out-of-band linearity; and (4) a BB-only two-stage HR amplifier boosting the 3and 5harmonic rejection ratios (HRR) with low hardware intricacy.

RF-to-BB-current-reuse wideband receiver with parallel N-path active/passive mixers

A single-MOS pole-zero lowpass filter for use in a single-ended-input current-reuse wideband receiver having a stacked RF-to-BB front end adapted to receive and process an RF signal to generate an N-phase BB signal, the lowpass filter being adapted to filter the N-phase BB signal, the lowpass filter having a lowpass input impedance for high stopband rejection at low voltage headroom consumption. The lowpass filter is arranged with one active MOS Mand one self-biased MOS M; Mcreates complex poles and two stopband zeros to boost the stopband rejection; Mprovides BB current-to-voltage conversion and common-mode feedback to alleviate tradeoff between voltage headband and BB gain; and Mis diode-connected to enable the generated BB signal to be copied to a next HR stage.

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Macau, China

Fujian Lin