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New complementary logic circuits using coupled open quantum systems

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1 Author(s)
Katayama, Y. ; IBM Res., Tokyo Res. Lab., Kanagawa, Japan

This paper present new complementary logic circuits that exploit an intrinsic bistability in nanoscale coupled open quantum systems such as wells and wires. When operated with a multiple-phase split-level clocking scheme, the device can latch a binary digit while meeting gain, tolerance, and I/O decoupling requirements at the same time, which was difficult with conventional back-to-back negative differential resistance devices. This same structure in a dual-rail configuration can function as a complete set of classical logic circuits by changing only the connections of the input signals. When these circuits are combined to form a sequential circuit, low power operation is expected, thanks to better voltage scaling, a zero-standby-power equalized state, and efficient charge recycling.

Published in:

Nanotechnology, IEEE Transactions on  (Volume:4 ,  Issue: 5 )

Date of Publication:

Sept. 2005

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