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Microstructures of various sizes and shapes are fabricated on the surface of the catalyst layer (CL) of the cathode of a PEMFC, adjacent to the micro porous layer (MPL). Three major experimental results are: (1) performance is improved by up to 60% and the percentage of the increase is the same as that of the increase in interface area of CL and MPL; (2) the cell suffers no significant performance...
A 0.18 mum CMOS low noise amplifier using RC-feedback topology is proposed with optimized matching, gain, noise, linearity and area for UWB applications. The IC prototype achieved 9.5 dB of average power gain, low 3.4 dB noise figure (NF), -9.2 dB input match, -13.5 dB return loss, -6 dBm of IIP3 and only 0.54 mm2 size with 15 mW power consumption. Good agreement between the simulated and measured...
By applying ~0.27% tensile strain to the flexible die of a 0.16 mum thin-body (100 mum) Si MOSFET mounted on plastic, the DC characteristics have been improved. The small DC performance degradation of the Si MOSFET transferred to plastic shows the potential of integrating electronics onto plastic. The device performance was improved by flexing the substrate to create stress, which produced a 10.7%...
A dual-band, low-phase-noise, low-power and small-sized voltage- controlled oscillator (VCO) with an adjustable inductor and switched resonator is described. The dual-band VCO operates near 2.4 and 5 GHz with a phase noise of - 120 and - 121 dBc/Hz at a 1 MHz offset and a tuning range of 250 MHz and 1.2 GHz, respectively. The power consumption is 1.5/1.8 mW for 2.4/5 GHz operations. The total size...
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