In standard NMOS, the pull-up is the same kind of transistor as is used for logic switches.
2.
Early MOS logic had one transistor type, which is enhancement mode so that it can act as a logic switch.
3.
Today, spiropyrans are most used as molecular logic devices, photochromic and electrooptical devices, molecular and supramolecular logic switches, photoswitches and multifunctional artificial receptors.
4.
"' Naphthalocyanine "'is a derivative of phthalocyanine used as a component in the development of IBM's single-molecule logic switch.
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