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1. 发明授权

US5745008A High voltage operational amplifier 失效
标题翻译：高压运算放大器
公开(公告)号：US5745008A
公开(公告)日：1998-04-28
申请号：US662541
申请日：1996-06-13
申请人： Thien Huynh Luong , Heinz Lehning
发明人： Thien Huynh Luong , Heinz Lehning
IPC分类号： G06G7/12 , H03F3/20 , H03F3/30 , H03F3/343 , H03F3/42 , H03F3/45 , H03F1/14
CPC分类号： H03F3/3001 , H03F3/423
摘要： A high voltage operational amplifier receives a low voltage differential input signal at a low voltage transconductance stage (3) which provides a differential current output. An intermediate stage (5) has a differential current input coupled to the differential current output of the transconductance stage (3) via a voltage buffer stage (4) and produces a voltage output at a high voltage level but with low voltage swings providing a voltage representing the differential input signal. An interface stage (9) is coupled to receive the voltage output of the intermediate stage (5) and provides voltage and current outputs representing the voltage output of the intermediate stage (5). Output sourcing and sinking stages (6 and 7) receive the voltage and current outputs of the interface stage (9), respectively, and produce high currents representative of the differential input signal. The combination of the high current outputs of the output sourcing and sinking stages (6 and 7) produces a high voltage output signal at the output terminal (8).
摘要翻译：高压运算放大器在低电压跨导级（3）处接收低电压差分输入信号，提供差分电流输出。中间级（5）具有通过电压缓冲级（4）耦合到跨导级（3）的差分电流输出的差分电流输入，并产生高电压电平的电压输出，但是提供低电压摆幅，提供电压代表差分输入信号。接口级（9）被耦合以接收中间级（5）的电压输出，并且提供表示中间级（5）的电压输出的电压和电流输出。输出采样和吸收级（6和7）分别接收接口级（9）的电压和电流输出，并产生代表差分输入信号的高电流。输出源极和漏极级（6和7）的高电流输出的组合在输出端（8）处产生高电压输出信号。

2. 发明授权

US5708393A High voltage operational amplifier output stage 失效
标题翻译：高压运算放大器输出级
公开(公告)号：US5708393A
公开(公告)日：1998-01-13
申请号：US662158
申请日：1996-06-12
申请人： Thien Huynh Luong , Hienz Lehning
发明人： Thien Huynh Luong , Hienz Lehning
IPC分类号： H03F3/30 , H03F3/42
CPC分类号： H03F3/3001 , H03F3/42 , H03F3/423
摘要： A current sourcing output stage for a high voltage operational amplifier receives a low voltage input signal (V.sub.IN) and provides a high current output signal corresponding to the low voltage input signal at an output terminal (8). A first PNP transistor (Q1) is coupled between a voltage supply (V.sub.CC) and a plurality of cascaded PNP transistors (Q2, Q3, Q8-Q11) coupled to the output terminal (8). The base of the first PNP transistor (Q1) is coupled to receive the input signal (V.sub.IN) and the bases of the cascaded PNP transistors are coupled to receive different bias voltages A control circuit (Q5-Q7, R1-R5) is coupled to the voltage supply (V.sub.CC) and has an input coupled to the output terminal (8) for deriving a plurality of bias voltages and to the cascaded PNP transistors (Q2, Q3, Q8-Q11) to supply the bias voltages to the respective bases of the cascaded PNP transistors, so that the cascaded PNP transistors (Q2, Q3, Q8-Q11) are biased by bias voltages dependent on the voltage swing of the output signal.
摘要翻译：用于高电压运算放大器的电流源输出级接收低电压输入信号（VIN），并在输出端（8）处提供对应于低电压输入信号的高电流输出信号。第一PNP晶体管（Q1）耦合在电压源（VCC）和耦合到输出端子（8）的多个级联PNP晶体管（Q2，Q3，Q8-Q11）之间。第一PNP晶体管（Q1）的基极被耦合以接收输入信号（VIN），并且级联PNP晶体管的基极被耦合以接收不同的偏置电压。控制电路（Q5-Q7，R1-R5）耦合到电压源（VCC），并且具有耦合到输出端子（8）的输出端以用于导出多个偏置电压和级联PNP晶体管（Q2，Q3，Q8-Q11）以将偏置电压提供给级联PNP晶体管，使得级联PNP晶体管（Q2，Q3，Q8-Q11）由取决于输出信号的电压摆幅的偏置电压偏置。

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