National Semiconductor's LM4562 dual 34V high-fidelity audio operational amplifier is said to practically eliminate distortion, with total harmonic distortion plus noise of 0.00003 percent. That performance reportedly exceeds the performance of hand-built audiophile discrete methodologies, thus setting a new standard for sound quality in high-end professional and high-quality consumer audio markets. It has wide 55-MHz gain bandwidth, 10-MHz power bandwidth.
Producing high-quality end-production metal parts with additive manufacturing for applications like aerospace and medical requires very tightly controlled processes and materials. New standards and guidelines for machines and processes, materials, and printed parts are underway from bodies such as ASTM International.
Engineers at the University of San Diego’s Jacobs School of Engineering have designed biobatteries on commercial tattoo paper, with an anode and cathode screen-printed on and modified to harvest energy from lactate in a person’s sweat.
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