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US 2016/0079225 A1Published application
Electrostatic protection circuit and integrated circuit
AssigneeSocionext Inc.
InventorMasahito ARAKAWA
Life of this patent
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Abstract
An electrostatic protection circuit includes a first transistor connected to an external terminal, a second transistor that is connected in series to the first transistor and that is in a normally OFF state. The electrostatic protection circuit includes a third transistor that is connected between a power source line and a gate of the first transistor, and a fourth transistor that is connected between the power source line and the gate of the first transistor in the opposite direction to the third transistor.
Claims20
An electrostatic protection circuit, comprising:
- a first transistor connected to an external terminal;
- a second transistor that is connected in series to the first transistor and that is normally in an OFF state;
- a third transistor that is connected between a power source line and a gate of the first transistor;
- and
- a fourth transistor that is connected between the power source line and the gate of the first transistor in a direction opposite to a direction of the third transistor.
2 more elements
An integrated circuit, comprising:
- an electrostatic protection circuit;
- and
- a protected circuit that is protected, by the electrostatic protection circuit, from static electricity applied to an external terminal, wherein the electrostatic protection circuit includes:
- a first transistor connected to the external terminal;
- a second transistor that is connected in series to the first transistor and that is normally in an OFF state;
- a third transistor that is connected between a power source line and a gate of the first transistor;
- and
- a fourth transistor that is connected between the power source line and the gate of the first transistor in a direction opposite to a direction of the third transistor.
5 more elements
Dependencies are inferred from the claim text.