公开(公告)号：EP4557914A1

公开(公告)日：2025-05-21

申请号：EP24213156.3

申请日：2024-11-15

Applicant: RichWave Technology Corp.

Inventor： Pai, Ching-Yao ,  Chen, Yu-Hung

IPC: H10D89/60 ,  H02H9/04

Abstract: An electrostatic discharge protection circuit (200) includes a main transistor (B21), a resistor element (R21) and a control circuit (210). A first voltage terminal (PAD21) is coupled to a second terminal of the main transistor (B21) and a first terminal of the resistor element (R21). A second voltage terminal (PAD22) is coupled to a first terminal of the main transistor (B21). The control circuit (210) is coupled between a second terminal of the resistor element (R21) and a control terminal of the main transistor (B21). When an electrostatic discharge event occurs, the product of the capacitance value of a parasitic capacitance (Cgs) of the control circuit (210) and the resistance value of the resistor element (R21) is greater than the duration of the electrostatic discharge event, and the control circuit (210) turns on the main transistor (B21) so that an electrostatic discharge current flows through the main transistor (B21).

公开(公告)号：EP3817048A1

公开(公告)日：2021-05-05

申请号：EP20204913.6

申请日：2020-10-30

Applicant: RichWave Technology Corp.

Inventor： Chao, Chuan-Chen ,  Pai, Ching-Yao

IPC: H01L27/02 ,  H02H9/04

Abstract: An integrated circuit (10) includes a signal pad (100), receiving an input signal during a normal mode, and receive an ESD signal during an ESD mode; an internal circuit (102), processing the input signal during the normal mode; a variable impedance circuit (104), comprising a first end coupled to the signal pad (100), a second end coupled to the internal circuit (102), and providing a low or high impedance path between the signal pad (100) and the internal circuit (102) during the normal or ESD mode; and a switch circuit (106), comprising a first end coupled to a control end of the variable impedance circuit (104), and a control end receiving a node voltage (Vn), wherein the switch circuit (106) switches the control end of the variable impedance circuit (104) to have a first specific voltage or be electrically floating during the normal or ESD mode.