The following NRI patent assets have been sold over multiple transactions<\/u><\/a> to third party purchasers. <\/center><\/p>\n Many nanoscale electrical sensors, actuators, and transducers operate in an electrically linear fashion, while almost all multi-transistor nanoscale circuits developed and explored in the literature are digital. Further, most multi-transistor nanoscale circuits employ a single nanotube for each transistor, an unscalable situation that is difficult to fabricate. NRI\u2019s work shows how to make differential amplifiers, and from these operation amplifier circuits, all on a single carbon\/graphene nanotube or nanoribbon, by using a novel \u201cchain-leapfrog\u201d circuit design technique. It is shown that standard differential amplifier and operation amplifier circuit configurations are naturally implementable with this technique. Part of the \u201cchain-leapfrog\u201d technique involves fully-nanoscale single (FET) nano-transistor constant-current sources at power-supply nodes, which allows for \u201csewing\u201d alternating positive and negative power supply rails across a single carbon\/graphene nanotube or nanoribbon and consecutively interconnected transistors (\u201cchaining) with other interconnection paths among metalized pads (\u201cleap-frogging\u201d). Accordingly, a single carbon\/graphene nanotube or nanoribbon can be draped over a metalized pad contact array to make operational amplifiers, comparators, and even A\/D and D\/A converters. The same technique can be used with printed semiconductor electronics on a far larger physical scale. CAD-based design tools and circuit library systems can be developed that automate and institutionalize contact-array configurations and the \u201cchain-leapfrog\u201d circuit topology technique. Optoelectronic properties of carbon\/graphene nanotubes and nanoribbons were also included in this work.<\/p>\n NRI\u2019s original work with different amplifiers was done in 2007 and included explicit designs for fully-nanoscale single (FET) nano-transistor constant-current sources. Several years later Army ARL Technical Report ARL-TR-5151 \u201cDifferential Amplifier Circuits Based on Carbon Nanotube Field Effect Transistors (CNTFETs)\u201d by M. Chin and S. Kilpatrick was published (April 2010) (available at www.arl.army.mil\/arlreports\/2010\/ARL-TR-5151.pdf <\/a><\/i>). This Army ARL work did not employ an active constant-current source, using a resistor instead which limits performance (as stated in the report and a known property of any two-transistor differential amplifier).<\/p>\n NRI’s early patent work in the area of nanoelectronic differential amplifiers and related circuits implemented on a segment of a graphene nanoribbon was cited in the survey book “Fullerenes\u2014Advances in Research and Application: 2013 Edition” (ISBN 1490100199, 9781490100197) pp.707-708.<\/p>\n NRI\u2019s current R&D in Molecular Electronics<\/a> is directed to other entirely new original approaches to molecular electronics and molecular devices. One of NRI\u2019s new molecular electronics approaches appears to allow direct molecular signal interfacing with chemical magnetic, spintronic, photonic, and other quantum processes and phenomena.\n<\/p>\n <\/center>
\nMolecular Electronics: Nanoelectronic, Carbon Nanotube, Graphene Nanoribbons, and Printed Electronic Analog Circuits<\/h3>\n
Sold Patent Assets Pertaining to Molecular Transistor Circuits for Nanotube Sensors and Transducers<\/h4>\n
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