公开(公告)号：US20190131935A1

公开(公告)日：2019-05-02

申请号：US16149145

申请日：2018-10-02

Applicant: MEDIATEK INC.

Inventor： Ying-Wei Chou ,  Sung-Han Wen ,  Chen-Chien Lin ,  Jou Lee

IPC: H03F1/34 ,  H03H7/06 ,  H03F3/181 ,  H04R3/04

Abstract: The present invention provides a circuit having a filter with an amplifier circuit for filtering and amplifying an input signal to generate an output signal, wherein a corner frequency of the filter is adjustable to control a settling time of the output signal.

公开(公告)号：US11025204B2

公开(公告)日：2021-06-01

申请号：US16149145

申请日：2018-10-02

Applicant: MEDIATEK INC.

Inventor： Ying-Wei Chou ,  Sung-Han Wen ,  Chen-Chien Lin ,  Jou Lee

IPC: H04B15/00 ,  H03F1/34 ,  H03H7/06 ,  H03F3/181 ,  H04R3/04 ,  H03G5/12 ,  H03F3/187 ,  H03F3/45

Abstract: The present invention provides a circuit having a filter with an amplifier circuit for filtering and amplifying an input signal to generate an output signal, wherein a corner frequency of the filter is adjustable to control a settling time of the output signal.

公开(公告)号：US20170288617A1

公开(公告)日：2017-10-05

申请号：US15434061

申请日：2017-02-16

Applicant: MEDIATEK INC.

Inventor： Chen-Chien Lin ,  Sung-Han Wen ,  Yu-Cheng Chang

IPC: H03F3/00

CPC classification number: H03F3/005 ,  H03F3/45475 ,  H03F2200/504 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45594 ,  H03G1/0094 ,  H03G3/001

Abstract: A programmable amplifier circuit includes an amplifier, an input capacitor coupled to an input of the amplifier, a feedback capacitor coupled to the input of the amplifier and an output of the amplifier, and a switched-capacitor resistor circuit. The switched-capacitor resistor circuit is coupled between the input of the amplifier and the output of the amplifier, and configured for simulating a feedback resistor element to provide a resistance for a feedback path of the amplifier by using at least one capacitor placed between the input of the amplifier and the output of the amplifier to avoid leakage current(s) flowing back to an input of the amplifier.

公开(公告)号：US10199995B2

公开(公告)日：2019-02-05

申请号：US15434061

申请日：2017-02-16

Applicant: MEDIATEK INC.

Inventor： Chen-Chien Lin ,  Sung-Han Wen ,  Yu-Cheng Chang

IPC: H03F3/00 ,  H03F3/45 ,  H03G1/00 ,  H03G3/00

Abstract: A programmable amplifier circuit includes an amplifier, an input capacitor coupled to an input of the amplifier, a feedback capacitor coupled to the input of the amplifier and an output of the amplifier, and a switched-capacitor resistor circuit. The switched-capacitor resistor circuit is coupled between the input of the amplifier and the output of the amplifier, and configured for simulating a feedback resistor element to provide a resistance for a feedback path of the amplifier by using at least one capacitor placed between the input of the amplifier and the output of the amplifier to avoid leakage current(s) flowing back to an input of the amplifier.