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:
Aug. 28, 1990
Filed:
Oct. 07, 1988
Setsufumi Kamuro, Matsudo, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A programmable logic device includes logic cells with input signal circuits for each of the logic cells. In the input circuits first MOS transistors are connected in series or parallel and one end of each of the input signal circuits is connected to one of the inputs of the logic cells. There are also signal lines, each of which interconnects the gates of the first transistors. Output signal circuits have second MOS transistors, each of which is connected to the signal lines, the gates of the second transistors being connected to the outputs of the logic cells. The channels of the first and second transistors can be ion-implanted so that the threshold level of the MOS transistors can be changed.