公开(公告)号：EP1388776B1

公开(公告)日：2007-06-13

申请号：EP02255483.6

申请日：2002-08-06

Applicant: STMicroelectronics Limited

Inventor： Rashid, Tahir ,  Darzy, Saul

IPC: G05F3/26

CPC classification number: G05F3/265

公开(公告)号：EP1388775A1

公开(公告)日：2004-02-11

申请号：EP02255482.8

申请日：2002-08-06

Applicant: STMicroelectronics Limited

Inventor： Rashid, Tahir

IPC: G05F3/22

CPC classification number: G05F3/225 ,  G05F3/30

Abstract: The invention relates 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: 本发明涉及一种电压参考发生器，其可以使用新的工艺技术制造，并且仍然与旧的设计/产品兼容。 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：EP1522913A1

公开(公告)日：2005-04-13

申请号：EP03256354.6

申请日：2003-10-09

Applicant: STMicroelectronics Limited

Inventor： Rashid, Tahir

IPC: G05F3/22

CPC classification number: G05F3/225

Abstract: A circuit for maintaining a generated reference voltage at a substantially constant level for a range of temperatures. The circuitry comprising: a first circuit arranged to generate a first voltage having a first temperature characteristic, and a second circuit arranged to generate a second voltage having a second temperature characteristic. The second voltage compensates for the first voltage to maintain the reference voltage at a substantially constant level over a first temperature range. The circuit also having a third circuit arranged to act in a second temperature range to compensate for the first voltage to maintain the reference voltage at a substantially constant level in the second temperature range.

Abstract translation: 一种用于在一定温度范围内将所产生的参考电压保持在基本恒定水平的电路。 该电路包括：第一电路，被布置成产生具有第一温度特性的第一电压;以及第二电路，被布置成产生具有第二温度特性的第二电压。 第二电压补偿第一电压以将参考电压在第一温度范围内保持在基本恒定的电平。 电路还具有布置成在第二温度范围内作用的第三电路，以补偿第一电压，以将参考电压维持在第二温度范围内基本上恒定的电平。

公开(公告)号：EP1388776A1

公开(公告)日：2004-02-11

申请号：EP02255483.6

申请日：2002-08-06

Applicant: STMicroelectronics Limited

Inventor： Rashid, Tahir ,  Darzy, Saul

IPC: G05F3/26

CPC classification number: G05F3/265

Abstract: This invention relates to a current source circuit which is adapted to generate a current proportional to absolute temperature (PTAT) and which is able to operate at low supply voltages. The current source circuit includes two current mirrors (Q 1 ,Q 2 ;Q 3 ,Q 4 ), a start-up circuit (QS1,QS2,QS,Rs) and an output transisitor (Q o ). The current of the start-up circuit flows through a resistor (R c ), which is part of one of the current mirrors, so as to provide a feedback for compensating for the variations in the supply voltage. An improved power supply rejection ratio (PSRR) is obtained.

Abstract translation: 本发明涉及一种电流源电路，其适于产生与绝对温度（PTAT）成比例的电流，并能够在低电源电压下工作。 电流源电路包括两个电流镜（Q1，Q2; Q3，Q4），启动电路（QS1，QS2，QS，Rs）和输出截止器（Qo）。 启动电路的电流通过作为电流镜之一的电阻器（Rc）流动，以便提供用于补偿电源电压变化的反馈。 获得了改进的电源抑制比（PSRR）。

公开(公告)号：EP1258986B1

公开(公告)日：2006-01-11

申请号：EP01304303.9

申请日：2001-05-15

Applicant: STMicroelectronics Limited

Inventor： Rashid, Tahir

IPC: H03G3/34

CPC classification number: H03G3/345 ,  H03G3/34

公开(公告)号：EP1258986A1

公开(公告)日：2002-11-20

申请号：EP01304303.9

申请日：2001-05-15

Applicant: STMicroelectronics Limited

Inventor： Rashid, Tahir

IPC: H03G3/34

CPC classification number: H03G3/345 ,  H03G3/34

Abstract: A mute switch comprises 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: 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，用于选择性地将输入节点的音频信号提供给输出节点。 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保持音频输出信号的DC偏置电平。