Electrostatic discharge circuit
AssigneesSemiconductor Manufacturing International (ShenZhen) Corporation, Semiconductor Manufacturing International (Shanghai) Corporation
InventorJue WANG
Life of this patent
Estimating the term…
Abstract
An electrostatic discharge circuit includes six transistors. A power supply voltage node is coupled with a gate and a drain of a first transistor and connected to a source of a second transistor and a drain of a fifth transistor. A source of the first transistor is coupled to a ground voltage node and connected to a gate of a third transistor and a gate of a fourth transistor. A gate of the second transistor is connected to the drain of the first transistor. A source of the third transistor is connected to the drain of the second transistor and a gate of the fifth transistor. A drain of the fourth transistor is connected to a drain of the third transistor. A source of the fourth transistor and a source of the sixth transistor are connected to the ground voltage node.
Claims20
An electrostatic discharge circuit comprising:
- a first transistor, a gate of the first transistor being coupled to a power supply voltage node, a drain of the first transistor being coupled to the power supply voltage node, and a source of the first transistor being coupled to a ground voltage node;
- a second transistor, a gate of the second transistor being connected to the drain of the first transistor, and a source of the second transistor being connected to the power supply voltage node;
- a third transistor, a gate of the third transistor being connected to the source of the first transistor, and a source of the third transistor being connected to the drain of the second transistor;
- a fourth transistor, a gate of the fourth transistor being connected to the source of the first transistor, a drain of the fourth transistor being connected to a drain of the third transistor, and a source of the fourth transistor being connected to the ground voltage node;
- a fifth transistor, a gate of the fifth transistor being connected to the source of the third transistor and the drain of the second transistor, and a drain of the fifth transistor being connected to the power supply voltage node;
- and
- a sixth transistor, a gate of the sixth transistor being connected to the drain of the third transistor and the drain of the fourth transistor, a drain of the sixth transistor being connected to the source of the fifth transistor, and a source of the sixth transistor being connected to the ground voltage node.
A method for configuring an electrostatic discharge circuit comprising:
- coupling a gate of a first transistor to a power supply voltage node, coupling a drain of the first transistor to the power supply voltage node, and coupling a source of the first transistor to a ground voltage node;
- connecting a gate of a second transistor to the drain of the first transistor, and connecting a source of the second transistor to the power supply voltage node;
- connecting a gate of a third transistor to the source of the first transistor, and connecting a source of the third transistor to the drain of the second transistor;
- connecting a gate of a fourth transistor to the source of the first transistor, connecting a drain of the fourth transistor to a drain of the third transistor, and connecting a source of the fourth transistor to the ground voltage node;
- connecting a gate of a fifth transistor to the source of the third transistor and the drain of the second transistor, and connecting a drain of the fifth transistor to the power supply voltage node;
- and
- connecting a gate of a sixth transistor to the drain of the third transistor and the drain of the fourth transistor, connecting a drain of the sixth transistor to the source of the fifth transistor, and connecting a source of the sixth transistor to the ground voltage node.
Dependencies are inferred from the claim text.