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:
Dec. 18, 2007
Filed:
Apr. 25, 2006
Ryusuke Sahara, Ome, JP;
Mitsugu Kusunoki, Kunitachi, JP;
Kazutaka Mori, Kokubunji, JP;
Hiroshige Kogayu, Kokubunji, JP;
Ryusuke Sahara, Ome, JP;
Mitsugu Kusunoki, Kunitachi, JP;
Kazutaka Mori, Kokubunji, JP;
Hiroshige Kogayu, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A DAC having a memory mat including a plurality of first memory cells, and a plurality of output lines connected to the plurality of first memory cells. Each of the plurality of memory cells has a first memory portion including bipolar transistors and storing information in non-volatility based on whether a junction of the bipolar transistors is destroyed or not, and a second memory portion connected to the first memory portion and for outputting information to corresponding one of the plurality of output lines. The DAC has a first mode in which information is transferred from the first memory portions to the second memory portions when the information is written into the second memory portions, and a second mode in which the second memory portions are specified externally and information is written into the second memory portions.