公开(公告)号：US20040119528A1

公开(公告)日：2004-06-24

申请号：US10620834

申请日：2003-07-15

Applicant: STMicroelectronics Limited

Inventor： Tahir Rashid

IPC: G05F003/02

CPC classification number: G05F3/225 ,  G05F3/30

Abstract: The described embodiments of the invention relate to a voltage reference generator which can be produced using new process technologies and which is still compatible with older designs/products. This is achieved by the introduction of circuitry to generate an offset voltage independently of the main reference voltage generation circuitry.

Abstract translation: 所描述的本发明的实施例涉及一种可以使用新的工艺技术制造的并且与旧的设计/产品兼容的电压参考发生器。 这通过引入电路来实现，以产生独立于主参考电压产生电路的偏移电压。

公开(公告)号：US20030016836A1

公开(公告)日：2003-01-23

申请号：US10147436

申请日：2002-05-15

Applicant: STMicroelectronics Limited

Inventor： Tahir Rashid

IPC: H04B015/00

CPC classification number: H03G3/345 ,  H03G3/34

Abstract: A mute switch including a field effect transistor receiving a mute control signal at its gate for selectively supplying an audio signal from an input node to an output node. A bipolar transistor is connected between the input node and the FET for reducing the voltage level of the audio signal prior to its application to the input node, and a further bipolar transistor is connected between the FET and the output node for raising the voltage level of the audio signal prior to its application to the output node. This serves to maintain the DC bias level of the audio output signal independently of the status of the mute control signal.

Abstract translation: 一种静音开关，包括场效应晶体管，在其栅极处接收静音控制信号，用于选择性地将音频信号从输入节点提供给输出节点。 双极晶体管连接在输入节点和FET之间，用于在施加到输入节点之前降低音频信号的电压电平，并且在FET和输出节点之间连接另外的双极晶体管，以提高电压电平 该音频信号在其应用于输出节点之前。 这用于独立于静音控制信号的状态来维持音频输出信号的DC偏置电平。