Miles & Stockbridge P.C.
Semiconductor integrated circuit device
A semiconductor integrated circuit device that has a high-voltage analog switch circuit and is operable at a low power-supply voltage, and which has a first high-voltage MOSFET HN1, a second high-voltage MOSFET, and a first floating gate voltage control circuit. The first floating gate voltage control circuit operates at a voltage of 5 V or lower, and when turning on the first high-voltage MOSFET and the second high-voltage MOSFET, the first floating gate voltage control circuit sets a voltage in the source terminal of the first high-voltage MOSFET as a reference voltage, adds a floating voltage corresponding to the power-supply voltage to the reference voltage, and supplies the added voltage to the gate terminals of the first high-voltage MOSFET and the second high-voltage MOSFET.
Hitachi, Ltd.
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Hiroyasu Tatsuya Shunsuke Yoshihiro Na
Yoshizawa Odawara Kubota Hayashi Li