Power supply circuit for preventing internal breakdown
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorChen kong Teh
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Abstract
A power supply circuit of an embodiment includes a first transistor including a source connected to an input terminal, and a gate connected to a first node; a second transistor including a drain connected to a drain of the first transistor, and a source connected to an output terminal; a third transistor including a source connected to the input terminal, a drain connected to the first node, and a gate connected to a second node; and a Zener diode including an anode connected to the input terminal, and a cathode connected to the second node.
Claims10
A power supply circuit comprising:
- a first transistor including a source connected to an input terminal, and a gate connected to a first node;
- a second transistor including a drain connected to a drain of the first transistor, and a source connected to an output terminal;
- a third transistor including a source connected to the input terminal, a drain connected to the first node, and a gate connected to a second node;
- a Zener diode including an anode connected to the input terminal, and a cathode connected to the second node;
- and
- a fourth transistor and a fifth transistor that are connected between the second node and a reference potential, the fourth transistor and the fifth transistor being NMOS transistors including gates and sources connected in common.
Dependencies are inferred from the claim text.