The HP work is not the only approach for assembling molecular circuits.
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One is to pack molecular circuits less densely.
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Without that, the already faint signals in a molecular circuit could easily drop below a useful level.
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For a molecular circuit to really work, researchers need to have a way of managing the way the signals travel.
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Molecular circuits packed a million times more densely will get extremely hot-a processor could get as hot as a stove.
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In the longer term, scientists are still thinking how to use their molecular circuits for performing the logic operations of computer chips.
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As molecular circuits are the information processing devices of cells and organisms, they have been the subject of research of biologists for many decades.
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He says that by packing molecular circuits very tightly and designing them for specialized tasks, you could run each device very slowly and still get huge computing power.
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At Hewlett-Packard, scientists say they think that they may be able to pair simple logic circuits made out of their molecular switches with silicon transistors that boost the signal before sending it to another molecular circuit.
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