公开(公告)号：US10608429B2

公开(公告)日：2020-03-31

申请号：US15476169

申请日：2017-03-31

Applicant: REALTEK SEMICONDUCTOR CORPORATION

Inventor： Tay-Her Tsaur ,  Cheng-Cheng Yen ,  Chien-Ming Wu ,  Cheng-Pang Chan

IPC: H02H9/04 ,  H01L27/02

Abstract: This disclosure provides an ESD protection circuit coupled to a first and a second terminals of a differential-pair circuit. The ESD protection circuit includes: an ESD sensing unit coupled to the first and the second terminals and sensing electrical changes at the first and the second terminals to generate a first trigger signal; and a first discharging unit coupled to the ESD sensing unit and turning on a first discharging path according to the first trigger signal.

公开(公告)号：US10931101B2

公开(公告)日：2021-02-23

申请号：US15878817

申请日：2018-01-24

Applicant: REALTEK SEMICONDUCTOR CORPORATION

Inventor： Chien-Ming Wu ,  Jian-Ru Lin ,  Liang-Huan Lei ,  Cheng-Pang Chan

IPC: H02H9/00 ,  H02H9/04 ,  H02H3/20 ,  H02H3/04

Abstract: The present invention discloses an electrostatic discharge (ESD) protection circuit, including: a first terminal configured to receive a first voltage; a second terminal configured to receive a second voltage; a detection voltage generating circuit configured to provide a detection voltage according to the first voltage and the second voltage; a warning circuit configured to generate a control signal according to the detection voltage, in which the control signal indicates a normal condition when the detection voltage satisfies predetermined voltage setting, and the control signal indicates an abnormal condition when the detection voltage does not satisfy the predetermined voltage setting; and a protected circuit configured to carry out a self-protection operation when receiving the control signal indicating the abnormal condition.

公开(公告)号：US10084412B2

公开(公告)日：2018-09-25

申请号：US15711700

申请日：2017-09-21

Applicant: REALTEK SEMICONDUCTOR CORPORATION

Inventor： Liang-Huan Lei ,  Cheng-Pang Chan ,  Chih-Lung Chen ,  Shih-Hsiung Huang

IPC: H03F3/45 ,  H03F1/02 ,  G11C27/02

CPC classification number: H03F1/0205 ,  G11C27/026 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2200/555 ,  H03F2203/45116 ,  H03F2203/45212 ,  H03F2203/45461 ,  H03F2203/45634

Abstract: This disclosure provides a charging-steering amplifier circuit and the control method thereof. The charging-steering amplifier circuit includes a charging-steering differential amplifier and a sample and hold circuit. The charging-steering amplifier circuit operates in a reset phase or in an amplifying phase to amplify a differential input signal. The control method includes steps of: in the reset phase, obtaining a common mode voltage of the differential input signal according to the differential input signal; in the reset phase, providing the common mode voltage to one of the charging-steering differential amplifier and the sample and hold circuit; in the reset phase, sampling the differential input signal by the sample and hold circuit to generate a voltage signal; and in the amplifying phase, inputting the voltage signal to the charging-steering differential amplifier.