Mattingly, Stanger, Malur & Brundidge, P.C.
Semiconductor integrated circuit and magnetic storage device using the same
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.
Hitachi, Ltd.
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G11B H03K G11B G11B B82Y H03K B82Y G11B
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Hiroki Fumio Masayoshi Tatsuya
Yamashita Yuuki Yagyu Kawashimo