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1. 发明公开

EP0700191A1 A speech amplifier associated with a LED 失效
标题翻译： Sprachverstärkerund zugeordnete Leuchtdiode
公开(公告)号：EP0700191A1
公开(公告)日：1996-03-06
申请号：EP94410072.6
申请日：1994-08-31
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Dasgupta, Uday, c/o SGS-Thomson Microelec. Pte Ltd , Ong, Chin Pueh, c/o SGS-Thomson Microelec. Pte Ltd
IPC分类号： H04M1/60 , H04M1/76
CPC分类号： H04M1/6025 , H04M1/76
摘要： The invention relates to a transmit amplifier for a telephone set without self supply, comprising a LED (1) having an anode connected to a first positive terminal (A) of the telephone line and means for determining the ratio between the line current (IL) and the line voltage (VL). The LED (1) is supplied with a constant current and this current is derived when the voltage (VL) across the terminals (A, B) of the line becomes lower than a predetermined value (Vs1).
摘要翻译：本发明涉及一种用于没有自供电的电话机的发射放大器，包括具有连接到电话线的第一正极端子（A）的阳极的LED（1）和用于确定线路电流（IL）和线电压（VL）。 LED（1）被供给恒定电流，并且当线路的端子（A，B）两端的电压（VL）变得低于预定值（Vs1）时导出该电流。

2. 发明公开

EP0615182A3 Reference current generating circuit 失效
标题翻译： Referenzstromsgeneratorschaltung。
公开(公告)号：EP0615182A3
公开(公告)日：1994-11-30
申请号：EP94301652.7
申请日：1994-03-09
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Ng, Solomon Keng Long , Loh, Gee Heng
IPC分类号： G05F3/26 , G05F3/22
CPC分类号： G05F3/22 , G05F3/265
摘要： A source/sink current generating circuit is arranged to generate source and sink currents which are matched and insensitive to fan out. This is achieved by using a biasing transistor (Q13) between first and second current mirrors which generate respectively the source and sink currents.

3. 发明公开

EP0615182A2 Reference current generating circuit 失效
标题翻译：参考电流发生电路
公开(公告)号：EP0615182A2
公开(公告)日：1994-09-14
申请号：EP94301652.7
申请日：1994-03-09
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Ng, Solomon Keng Long , Loh, Gee Heng
IPC分类号： G05F3/26 , G05F3/22
CPC分类号： G05F3/22 , G05F3/265
摘要： A source/sink current generating circuit is arranged to generate source and sink currents which are matched and insensitive to fan out. This is achieved by using a biasing transistor (Q13) between first and second current mirrors which generate respectively the source and sink currents.
摘要翻译：源/汇电流产生电路被布置成产生匹配且对扇出不敏感的源电流和汇电流。这是通过在分别产生源电流和吸入电流的第一和第二电流镜之间使用偏置晶体管（Q13）来实现的。

4. 发明公开

EP0596653A1 Low voltage reference current generating circuit 失效
标题翻译： Niederspannungs-Referenzstromgeneratorschaltung。
公开(公告)号：EP0596653A1
公开(公告)日：1994-05-11
申请号：EP93308597.9
申请日：1993-10-28
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Ng, Solomon Kenglong , Loh, Gee Heng
IPC分类号： G05F3/26
CPC分类号： G05F3/265 , Y10S323/901 , Y10S323/907
摘要： An integrated circuit current generator for operation at low power supply voltages is disclosed. The circuit utilises two transistors (Q3,Q4) connected as a current mirror with two further cascode transistors (Q5,Q6). The invention provides an additional transistor (Q9) connected to limit the voltage across one of the current mirror transistors. In this way, fluctuations in the reference currents is reduced even where the supply voltage fluctuates.
摘要翻译：公开了一种用于在低电源电压下操作的集成电路电流发生器。该电路使用两个晶体管（Q3，Q4）连接作为具有两个另外的共源共栅晶体管（Q5，Q6）的电流镜。本发明提供了连接以限制跨过电流镜晶体管之一的电压的附加晶体管（Q9）。以这种方式，即使电源电压波动，参考电流的波动也减小。

5. 发明公开

EP0357365A3 An audio amplifier 失效
标题翻译：音频放大器
公开(公告)号：EP0357365A3
公开(公告)日：1990-11-28
申请号：EP89308703.1
申请日：1989-08-29
申请人： SGS- THOMSON MICROELECTRONICS (PTE) LTD.
发明人： Heng, Loh Gee
IPC分类号： H03F3/183 , H03F1/26 , H03F3/343
CPC分类号： H03F1/26 , H03F3/183
摘要： An audio amplifier comprises a first current mirror (Q12, Q13, R10, R11) having an input coupled to an output of a cascade differential pair (Q10, Q11) and an output coupled to an output of a first constant current source (Q14, Q15, R12), and a second constant current source (Q16, Q18, CC10) supplying the voltage reference (Q15) of the first constant current source. Hitherto a resistor has been used instead of the second constant current source to reduce noise. However, using a resistor results in the amplifier having a relatively low power supply rejection ratio, thereby degrading the performance of the amplifier. Accordingly the present invention uses a second constant current source and reduces noise generated thereby using the first constant current source.

6. 发明公开

EP0794477A1 A voltage generation circuit 失效
标题翻译： Schaltung zur Spannungserzeugung
公开(公告)号：EP0794477A1
公开(公告)日：1997-09-10
申请号：EP97106656.8
申请日：1994-07-04
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Dutt, Saibul , Mohan, Muni
IPC分类号： G05F1/46 , G05F3/16 , H03K5/08 , H02M1/08
CPC分类号： G05F3/247 , G05F3/24 , H02M1/10
摘要： A circuit is provided for generating reference voltages which are at constant values (V p ) with respect to a varying DC voltage (V DC ). A fixed reference voltage (V BG ) is generated which is fixed with respect to the ground voltage (V SS ). Fractions (Vi) of this fixed reference voltage are added and subtracted to the varying DC voltage ( VDC ) by means of differential amplifiers (A3;A4), in order to produce the desired reference voltages respective to the varying DC voltage (V DC ).
摘要翻译：提供电路，用于产生相对于变化的直流电压（VDC）处于恒定值（Vp）的参考电压。产生相对于接地电压（VSS）固定的固定参考电压（VBG）。通过差分放大器（A3; A4）将该固定参考电压的分数（Vi）相加并减去变化的直流电压（VDC），以产生相应于变化的直流电压（VDC）的所需参考电压。

7. 发明公开

EP0693749A1 A bidirectional load current sense circuit for a H-bridge 失效
标题翻译： BirolktionaleStromabfühlschaltungfüreine H-Brücke
公开(公告)号：EP0693749A1
公开(公告)日：1996-01-24
申请号：EP94410051.0
申请日：1994-07-19
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Elango, PakriSwami
IPC分类号： G11B5/55
CPC分类号： G11B5/5526
摘要： The present invention relates to a current sense device for a load arranged in a diagonal of a H-bridge comprising MOS transistors (M1, M2, M3, M4) and operating in class AB, characterized in that it comprises first means, independent from the H-bridge, for measuring the current (I) flowing in the load (1). A current-voltage converter (3) for converting the current measured by said first means into a voltage (Vout) proportional to said current, this voltage being applied to a sense amplifier that determines the transconductance gain of a control amplifier of the transistors of the H-bridge.
摘要翻译：本发明涉及一种用于负载布置在包括MOS晶体管（M1，M2，M3，M4）并且在AB类中操作的H桥的对角线中的负载的电流感测装置，其特征在于，它包括第一装置，独立于 H桥，用于测量在负载（1）中流动的电流（I）。一种用于将由所述第一装置测量的电流转换成与所述电流成比例的电压（Vout）的电流 - 电压转换器（3），所述电压被施加到读出放大器，所述读出放大器确定所述晶体管的控制放大器的跨导增益 H桥。

8. 发明公开

EP0666636A3 Missing cycle recovery scheme 失效
标题翻译：缺少循环恢复方案
公开(公告)号：EP0666636A3
公开(公告)日：1995-09-13
申请号：EP95300265.6
申请日：1995-01-17
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Mohan, Muni, SGS-Thomson Microelectron. Pte Ltd.
IPC分类号： H02M1/10
CPC分类号： H02M1/10
摘要： The current invention provides circuitry for use in an integrated circuit controlled voltage doubler/bridge circuit such that during any period wherein a lack of AC supply voltage is detected by the circuitry and following a period of AC input voltage within a lower defined range of values, repeated triac firing pulses are provided such that the AC supply will be rectified and doubled as soon as such a supply returns, whether the supply returns with the same or opposite polarity to that which it had, just before being interrupted.
摘要翻译：本发明提供用于集成电路控制的倍压器/桥接电路中的电路，使得在电路检测到缺少AC电源电压并且在一个较低限定值范围内的AC输入电压周期之后的任何周期期间，提供重复的三端双向可控硅触发脉冲，使得交流电源将在此电源恢复时立即被整流并加倍，无论电源是否在其中断之前以相同或相反的极性返回。

9. 发明公开

EP0666636A2 Missing cycle recovery scheme 失效
标题翻译： Fehlendzyklus-Widerherstellungsschema。
公开(公告)号：EP0666636A2
公开(公告)日：1995-08-09
申请号：EP95300265.6
申请日：1995-01-17
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Mohan, Muni, SGS-Thomson Microelectron. Pte Ltd.
IPC分类号： H02M1/10
CPC分类号： H02M1/10
摘要： The current invention provides circuitry for use in an integrated circuit controlled voltage doubler/bridge circuit such that during any period wherein a lack of AC supply voltage is detected by the circuitry and following a period of AC input voltage within a lower defined range of values, repeated triac firing pulses are provided such that the AC supply will be rectified and doubled as soon as such a supply returns, whether the supply returns with the same or opposite polarity to that which it had, just before being interrupted.
摘要翻译：本发明提供了一种用于集成电路控制的倍压器/桥式电路的电路，使得在电路中检测到缺少AC电源电压并且在一定数值范围内的AC输入电压之后，提供重复的三端双向可控硅开关脉冲，使得在电源返回之后，AC电源将被纠正和加倍，无论在中断之前，电源是否以与其具有的相同或相反的极性返回。

10. 发明公开

EP0633652A3 A DC voltage supply circuit 失效
标题翻译： DC电源电路。
公开(公告)号：EP0633652A3
公开(公告)日：1995-04-19
申请号：EP94304903.1
申请日：1994-07-04
申请人： SGS-THOMSON MICROELECTRONICS PTE LTD.
发明人： Dutt, Saibul , Mohan, Muni
IPC分类号： H02M7/10 , H02M1/10 , G05F3/24
CPC分类号： G05F3/247 , G05F3/24 , H02M1/10
摘要： A circuit is provided for rectifying an AC input voltage to provide a substantially constant DC output voltage. A composite input voltage is derived from the AC input voltage, which is composed of a scaled input AC voltage shifted by a selected DC bias voltage such that the entire range of such input signal voltages is contained within the supply voltages of detection circuitry which controls the rectifier circuitry. The detection is thus carried out during both the upper and lower excursions of the input AC voltage.

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