(54) SEMICONDUCTOR DEVICE
(75) Inventor: Yasuo Yamaguchi, Tokyo (JP)
(73) Assignee: Mitsubishi Denki Kabushiki Kaisha, Tokyo (JP)
( * ) Notice: This patent issued on a continued prosecution application filed under 37 CFR 1.53(d), and is subject to the twenty year patent term provisions ol 35 U.S.C. 154(a)(2).
Subject to any disclaimer, the term ol this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/038,144
(22) Filed: Mar. 11, 1998
(30) Foreign Application Priority Data
Sep. 12, 1997 (JP) 9-248372
(51) Int. CI. H02H 9 00
(52) U.S. CI 361/56; 361/91.1; 361/111;
361/115
(58) Field of Search 361/56, 58, 91.1,
361/111, 117, 118, 127, 115
(56) References Cited
U.S. PATENT DOCUMENTS
4,989,057 1/1991 Lu 357/23.7
