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A low power monolithic reconfigurable direct-conversion receiver RF front-end for 802.11a/b/g applications is presented. It consists of a reconfigurable LNA and a high linearity quadrature down-converter. The LNA could be switched between two operation bands by utilizing a fully-differential switchable inductor. With a positive feedback, the noise figure of the common gate LNA is lowered down. The...
A multi-standard transceiver requires a wide-band radio frequency front-end in order to process RF signals of any frequency included by all the standards concerned. A noise cancellation technology is utilized in the low noise amplifier (LNA) to cancel the noise introduced by the source resistance matching segment. An active balun is embedded in the input stage of the mixer, which connect the single-end...
In this paper, a low-power ultra-wideband (UWB) low-noise amplifier (LNA) is proposed. We use shunt-feedback resistor structure for wideband input matching and series L-shunt C structure for gain flatness. Numerical simulation based on TSMC 0.18 μm 1 poly-6 metal process shows that the UWB LNA achieves 18 dB gain at 3-5 GHz band and 3 dB noise figure, operates from 1.8 V power supply, and dissipates...
A differential low noise amplifier applied in ASK receiver is designed and fabricated in UMC 0.18 ??m CMOS process. The amplifier employs a differential cascode structure with source degeneration stage for single input and differential output, and avoids using balun when connected to mixer. This low noise amplifier has a measured forward gain of 18.2 dB and a noise figure of only 1.65 dB, thus can...
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