ESD protection circuit
AssigneeNXP B.V.
InventorsBernardus Henricus Krabbenborg, Marco Berkhout, Johannes Van Zwol
Life of this patent
Estimating the term…
Abstract
An ESD protection circuit comprises a first supply line (VDD), a second supply line (Vss), an ESD protection device, preferably being configured as a transistor (MP), which is connected between the first and second supply line (VDD, VSS) and at least one pin (VA) connected to the first and second supply lines (VDD, VSS) via diodes D1, D2. The ESD protection device is controllable by a trigger voltage that is set by a trigger voltage setting circuit (RP, RD, Z1, Z2, Z3). The ESD protection circuit comprises a trigger circuit (1) being connected to the at least one pin (VA) and providing pin specific trigger voltages, wherein the trigger circuit (1) is further connected to the trigger voltage setting circuit.
Claims9
A circuit comprising:
- a first supply line, a second supply line, and an electro static discharge (ESD) protection device connected between the first and second supply lines;
- and
- at least one pin connected to the first and second supply lines via diodes;
- wherein the ESD protection device comprises a trigger circuit connected to the at least one pin, wherein the trigger circuit provides a first pin specific trigger voltage and a second pin specific trigger voltage;
- wherein the first pin specific trigger voltage occurs between the at least one pin and the first supply line, and the second pin specific trigger voltage occurs between the at least one pin and the second supply line;
- wherein the first pin specific trigger voltage and the second pin specific trigger voltage are set by a trigger-voltage setting-circuit, wherein the trigger circuit is further connected to the trigger-voltage setting-circuit.
Dependencies are inferred from the claim text.