公开(公告)号：US20230396246A1

公开(公告)日：2023-12-07

申请号：US18299852

申请日：2023-04-13

Applicant: MEDIATEK INC.

Inventor： Yueh-Min CHEN ,  Ting-Yang WANG ,  Yu-Hsin LIN ,  Wen-Chieh WANG

IPC: H03K17/16 ,  H03K17/687 ,  H03K17/06

CPC classification number: H03K17/162 ,  H03K17/6872 ,  H03K17/063

Abstract: A fast-transient buffer is shown. The fast-transient buffer has a flipped voltage follower coupled between the input terminal and the output terminal of the fast-transient buffer, and a first MOS transistor coupled to the flipped voltage follower as well as the output terminal of the fast-transient buffer. The first MOS transistor regulates the output voltage of the output terminal of the fast-transient buffer, in the opposite direction in comparison with an output voltage regulation direction due to the flipped voltage follower.

公开(公告)号：US20220255516A1

公开(公告)日：2022-08-11

申请号：US17542675

申请日：2021-12-06

Applicant: MEDIATEK INC.

Inventor： Yu-Hsin LIN ,  Fong-Wen LEE ,  Wen-Chieh WANG

IPC: H03F3/45

Abstract: An amplification circuit with a common-mode voltage compensation circuit is shown. The common-mode voltage compensation circuit has a first compensation resistor coupled between an input terminal of a loop filter of the amplification circuit and a control node, and a second compensation resistor coupled between another input terminal of the loop filter and the control node. The control node is coupled to a power ground voltage when the two output signals of the amplification circuit are high, and it is coupled to a power supply voltage when the two output signals of the amplification circuit are low.

公开(公告)号：US20210359653A1

公开(公告)日：2021-11-18

申请号：US17227583

申请日：2021-04-12

Applicant: MEDIATEK INC.

Inventor： Fong-Wen LEE ,  Wen-Chieh WANG ,  Yu-Hsin LIN

IPC: H03F3/217 ,  H03K19/21

Abstract: A class-D amplifier with good signal-to-noise ratio (SNR) performance is shown. The class-D amplifier includes a loop filter, a pulse-width modulation signal generator, a gate driver, a power driver, and a feedback circuit, which are configured to establish a closed amplification loop. The feedback circuit is configured to establish a feedback path. The class-D amplifier further includes a feedback breaker. The feedback breaker breaks the feedback path in response to conditions in which there no-signal information in the class-D amplifier.