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:
May. 16, 2006
Filed:
Jan. 07, 2005
Hiroki Yamashita, Hachioji, JP;
Masayoshi Yagyu, Hanno, JP;
Fumio Yuuki, Kamifukuoka, JP;
Tatsuya Kawashimo, Kokubunji, JP;
Hiroki Yamashita, Hachioji, JP;
Masayoshi Yagyu, Hanno, JP;
Fumio Yuuki, Kamifukuoka, JP;
Tatsuya Kawashimo, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides a semiconductor integrated circuit capable of reducing a circuit area and a magnetic storage device using the same. The circuit in the present invention is provided with a single-stage output transistor for supplying write current to a magnetic head, a current source for outputting reference current of the write current, a diode-connected NMOS transistor for converting the current to gate voltage and having a certain device size ratio to the output transistor, a regulator circuit for transmitting gate voltage of the NMOS transistor and reducing output impedance, and a CMOS circuit for setting power supply voltage to an output of the regulator circuit and controlling the gate voltage of the output transistor. Then, this circuit is applied as a write circuit in a magnetic storage device.