Semiconductor device having an ESD protection circuit
AssigneeRenesas Electronics Corporation
InventorMasakazu Ikegami
Life of this patent
Estimating the term…
Abstract
A semiconductor integrated circuit, includes an operational amplifier including a first input terminal, a second input terminal, and an output terminal, a first transistor which has a source-drain route connected between an external terminal and a first voltage, and a gate terminal connected to the output terminal of the operational amplifier; and a second transistor which has a source-drain route connected between the first input terminal of the operational amplifier and the first voltage, and a gate terminal connected to the output terminal of the operational amplifier.
Claims20
A semiconductor integrated circuit, comprising:
- a first transistor which has a source-drain route connected between an external terminal and a first voltage, and a gate terminal connected to the first voltage;
- a second transistor which has a source-drain route connected between the external terminal and a second voltage, and a gate terminal connected to the second voltage;
- a third transistor which has a source-drain route connected between the external terminal and the first voltage, and a gate terminal;
- a fourth transistor which has a source-drain route connected between a first terminal and the first voltage, and a gate terminal connected to the first voltage;
- a fifth transistor which has a source-drain route connected between the first terminal and the second voltage, and a gate terminal connected to the second voltage;
- a sixth transistor which has a source-drain route connected between the first terminal and the first voltage, and a gate terminal;
- and
- an operational amplifier which includes a first input terminal connected to the first terminal, and a second input terminal connected to a second terminal, the operational amplifier generating a third voltage between the first voltage and the second voltage, and an output terminal,
- wherein the gate terminal of the third transistor and the gate terminal of the sixth transistor are connected to the output terminal of the operational amplifier.
A semiconductor integrated circuit, comprising:
- an operational amplifier including a first input terminal, a second input terminal, and an output terminal;
- a first transistor which has a source-drain route connected between an external terminal and a first voltage, and a gate terminal connected to the output terminal of the operational amplifier;
- and
- a second transistor which has a source-drain route connected between the first input terminal of the operational amplifier and the first voltage, and a gate terminal connected to the output terminal of the operational amplifier.
A semiconductor integrated circuit, comprising:
- an operational amplifier including a positive input terminal, a negative input terminal, and an output terminal;
- a first transistor which has a source-drain route connected between a first voltage and the positive input terminal of the operational amplifier, and a gate terminal connected to the first voltage;
- a second transistor which has a source-drain route connected between the positive input terminal of the operational amplifier and a second voltage, and a gate terminal connected to the second voltage;
- a third transistor which has a source-drain route connected between the positive input terminal of the operational amplifier and the second voltage, and a gate terminal connected to the second voltage;
- and
- a fourth transistor which has a source-drain route connected between an external terminal and the second voltage, and a gate terminal connected to the output terminal of the operational amplifier.
Dependencies are inferred from the claim text.