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。