公开(公告)号：US20190098404A1

公开(公告)日：2019-03-28

申请号：US15983460

申请日：2018-05-18

Applicant: Samsung Electronics Co., Ltd.

Inventor： Myung-Jin LEE ,  Young-Hun Kim

IPC: H04R3/00 ,  H02H7/20 ,  H02H1/00 ,  H01R13/703

Abstract: An electronic circuit includes an output generator and an over-voltage detector. The output generator is configured to output an output signal to an output terminal. In response to an amplitude of a voltage of the output terminal being greater than an allowable amplitude, the over-voltage detector is configured to output an over-voltage detection signal of a first logic value, such that elements included in the output generator are turned off. In response to the over-voltage detector outputting the over-voltage detection signal of the first logic value again before a reference time elapses after the first logic value of the over-voltage detection signal changes to a second logic value of the over-voltage detection signal, the turned-off elements remain turned off. In response to the over-voltage detector outputting the over-voltage detection signal of the second logic value during the reference time, the turned-off elements are turned on.

公开(公告)号：US20150237438A1

公开(公告)日：2015-08-20

申请号：US14542936

申请日：2014-11-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Myung-Jin LEE ,  Pan-Jong KIM

IPC: H04R1/10

CPC classification number: H04R1/1091 ,  H03G3/348 ,  H04R3/00

Abstract: A headphone driver includes a pre-main amplifier and a main amplifier. The pre-main amplifier receives an input signal from first and second node and outputs the input signal to a third node. The main amplifier is between the third node and a fourth node. A first switch is between the fourth node and a fifth node. A second switch is between the fourth node and a sixth node. A third switch is between the fourth node and a seventh node. A fourth switch is between the fifth and seventh nodes. A fifth switch is between the first and fifth nodes. A capacitor is between the third and fifth nodes. A first feedback resistor is between the first and seventh nodes. A second feedback resistor is between the second and sixth nodes, and the sixth and seventh nodes are connected to a speaker.

Abstract translation: 耳机驱动器包括一个前置放大器和一个主放大器。 前置主放大器接收来自第一和第二节点的输入信号，并将输入信号输出到第三节点。 主放大器位于第三节点和第四节点之间。 第一个交换机位于第四个节点和第五个节点之间。 第二个交换机位于第四个节点和第六个节点之间。 第三个交换机位于第四个节点和第七个节点之间。 第四个开关在第五和第七个节点之间。 第五个开关在第一和第五个节点之间。 电容器位于第三和第五节点之间。 第一个反馈电阻在第一个和第七个节点之间。 第二反馈电阻在第二和第六节点之间，第六和第七节点连接到扬声器。

公开(公告)号：US20240297659A1

公开(公告)日：2024-09-05

申请号：US18663352

申请日：2024-05-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Moo Yeol CHOI ,  Young Hyun YOON ,  Hyun Sun SHIM ,  Myung-Jin LEE

IPC: H03M1/08

CPC classification number: H03M1/08

Abstract: A noise filtering circuit, a digital to analog converter and an electronic device are provided. The noise filtering circuit comprises a first amplifier configured to receive a bias voltage at a first input terminal, receive a bias output voltage at a second input terminal though a feedback path, and compensate for a difference between the bias voltage and the bias output voltage; a first transistor connected to an output of the first amplifier and having a gate to which an off-voltage is applied; a first capacitor connected to the first transistor; a second capacitor connected to the output of the first amplifier; a second transistor connected to the second capacitor and having a gate to which an off-voltage is applied, and a second amplifier having an input terminal connected to the first capacitor and a second input terminal connected to the second transistor.

公开(公告)号：US20230188147A1

公开(公告)日：2023-06-15

申请号：US17815678

申请日：2022-07-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Moo Yeol CHOI ,  Young Hyun YOON ,  Hyun Sun SHIM ,  Myung-Jin LEE

IPC: H03M1/08

CPC classification number: H03M1/08

Abstract: A noise filtering circuit, a digital to analog converter and an electronic device are provided. The noise filtering circuit comprises a first amplifier configured to receive a bias voltage at a first input terminal, receive a bias output voltage at a second input terminal though a feedback path, and compensate for a difference between the bias voltage and the bias output voltage; a first transistor connected to an output of the first amplifier and having a gate to which an off-voltage is applied; a first capacitor connected to the first transistor; a second capacitor connected to the output of the first amplifier; a second transistor connected to the second capacitor and having a gate to which an off-voltage is applied, and a second amplifier having an input terminal connected to the first capacitor and a second input terminal connected to the second transistor.