The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1998
Filed:
Apr. 05, 1996
Toshio Ohshima, Kawasaki, JP;
Richard A Kiehl, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A single-electron tunneling (SET) element used as a logic or memory element includes at least one tunneling junction with a minute metal-insulator-metal sandwich structure, and a biasing power source which is connected in series to the at least one tunneling junction and whose ON/OFF operation is controlled by an external control input. SET oscillations are generated in the at least one tunneling junction and the generated oscillations are phase-locked to subharmonics of a pump signal supplied from an AC power source, to thus exhibit a plurality of stable phase states. Also, a plurality of gates, each including the SET element, are constituted in the form of a logic network to realize a predetermined logic operation in a computer. In the logic network, an input signal with a frequency half that of the pump signal is continually applied to a specified gate among the plurality of gates, while the biasing power sources of all of the gates are kept in ON state. Alternatively, when the biasing power source of the specified gate is switched ON, the biasing power sources of all of a first group of gates providing inputs to the specified gate, and the biasing power sources of all of a second group of gates providing inputs to the first group of gates, are kept in ON state.