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This paper describes the practical issues associated with the test and design of an impulse-based ultra wideband (I-UWB) transmitter for biomedical applications. A 4 GHz gated ring oscillator is designed and fabricated in a 65 nm CMOS process as a pulse generator for a pulse-position-modulated I-UWB transmitter. The parasitic effects on-chip and off-chip associated with the test setup are investigated,...
The candidate topologies for low-power, wideband LNAs are analyzed in this paper, and a novel LNA topology for the 3.1–5 GHz UWB frequency band is presented. The LNA uses subthreshold biasing and employs its Miller capacitance as part of a Butterworth-type bandpass filter for input impedance matching. The LNA achieves a power gain of 14.4 dB with S11 less than −10 dB across the 3.1–5 GHz frequency...
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