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1. (WO2018053991) ELECTROSTATIC-DISCHARGE PROTECTION CIRCUIT APPLIED TO INTEGRATED CIRCUIT

Pub. No.:    WO/2018/053991    International Application No.:    PCT/CN2017/074450
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Thu Feb 23 00:59:59 CET 2017
IPC: H01L 27/02
Applicants: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
深圳市汇顶科技股份有限公司
Inventors: LEE, Tsung-Lung
李宗隆
Title: ELECTROSTATIC-DISCHARGE PROTECTION CIRCUIT APPLIED TO INTEGRATED CIRCUIT
Abstract:
An electrostatic-discharge protection circuit (10), comprising: a first N-type transistor (Q1), a second N-type transistor (Q2), and a high-potential tracking circuit (TH); the high-potential tracking circuit (TH) comprises: a first input end (In_1), a second input end (In_2), and an output end (Out); the first input (In_1) is coupled to a metal pad (PAD), for receiving a metal-pad voltage (VPAD), the second input (In_2) receives a power-supply voltage (VDDIO), and the output (Out) is coupled to the second N-type transistor (Q2), for outputting a high-potential tracking voltage (VE2), wherein the high-potential tracking voltage (VE2) is greater than or equal to the metal-pad voltage (VPAD).