Patent ID: 11894671
Assignee: NANYA TECHNOLOGY CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electrical over stress (EOS) protection device, configured to protect an internal circuit of a chip, and the internal circuit receiving an input voltage through a pad, the EOS protection device, comprising:
a first protection resistor circuit, coupled to the pad of the chip;
a detection circuit, coupled to the first protection resistor circuit, detecting the input voltage, and providing a turn-on voltage when the input voltage is higher than a preset voltage;
a voltage divider circuit, coupled to the detection circuit and a ground terminal, and the first protection resistor circuit, the detection circuit, and the voltage divider circuit forming a first discharge path when the input voltage is higher than the preset voltage; and
a discharge protection circuit, coupled to the pad, the detection circuit, and the ground terminal, and providing at least one second discharge path according to the turn-on voltage.