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US 2018/0166876 A1Published application
High holding voltage clamp
AssigneeSofics BVBA
InventorSven Van Wijmeersch
Life of this patent
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Abstract
An electrostatic discharge (ESD) protection device with a high holding voltage is disclosed including at least an ESD clamp coupled to a holding voltage tuning circuit. The ESD clamp may be coupled to the holding voltage tuning circuit through a connection circuit such as a diode. The ESD clamp may be implemented by a first silicon controlled rectifier (SCR) and the holding voltage tuning circuit may be implemented as a second SCR.
Claims19
An electrostatic discharge (ESD) protection device coupled between a first node and a second node, comprising:
- a first silicon controlled rectifier (SCR) including a first PNP transistor and a first NPN transistor, the first SCR further including a first anode, a first cathode electrically coupled to the second node, and a first control tap electrically coupled to a base of the first PNP transistor;
- a holding voltage tuning circuit including a transistor, wherein the holding voltage tuning circuit further includes a second anode, a second cathode, and a first control node, wherein the second anode is directly electrically connected to the first node, and the second cathode is electrically coupled to the first control tap;
- and
- a connection circuit electrically coupled between the first anode and the first control node;
- and
- wherein the ESD protection device is configured to trigger during an ESD event to protect circuitry between the first node and the second node.
3 more elements
Dependencies are inferred from the claim text.