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A low noise amplifier for UWB and broadband applications is presented. The active dual loop negative feedback architecture dissevers the severe tradeoff existing between the input impedance, gain and noise figure, and produces a flat S11 across the entire band. The LNA is composed of a voltage amplifying negative feedback amplifier with a transconductance amplifier forming a shunt-shunt feedback around...
Custom designed for the IEEE802.15.4a standard, a 2-stage pseudo-differential low-noise amplifier (LNA) with a notch ges 20 dB in the IEEE802.11a WLAN band is presented for impulse-radio ultra-wideband (ir-UWB). This band-reject LNA is power-to-current (PI) configured employing reactive dual-loop negative feedback, which reduces the noise figure and allows for orthogonal impedance and noise matching...
A dual-loop resistive-feedback power-to-current amplifier circuit to be implemented in SiGe or GaAs IC technology is presented. Simulation results indicate that any technology process with NFmin < 0.3 dB and fT > 20 GHz is able to achieve an overall noise figure less than 0.5 dB, an input return loss less than -15 dB and flat gain over a frequency range from 0.6 GHz to 1.6 GHz
A 17GHz RF receiver front-end consisting of a low-noise amplifier, dual balanced mixers, an LC voltage-controlled oscillator, and a frequency tripler implemented using a ring oscillator is presented in this paper. The measured LC-VCO phase noise is -112dBc/Hz at 1MHz offset from a 5.7GHz carrier. For a 1.3-3V range in VCO tuning voltage, the locking range of the tripler is 5.5GHz (16.1GHz-21.6GHz)...
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