Nanotube-based switching elements with multiple controls and circuits
made from such. A switching element includes an input node, an output node, and
a nanotube channel element having at least one electrically conductive nanotube.
A control structure is disposed in relation to the nanotube channel element to
controllably form and unform an electrically conductive channel between said input
node and said output node. The output node is constructed and arranged so that
channel formation is substantially unaffected by the electrical state of the output
node. The control structure includes a control electrode and a release electrode,
disposed on opposite sides of the nanotube channel element. The control and release
may be used to form a differential input, or if the device is constructed appropriately
to operate the circuit in a non-volatile manner. The switching elements may be
arranged into logic circuits and latches having differential inputs and/or non-volatile
behavior depending on the construction.