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1. 发明授权

US5381112A Fully differential line driver circuit having common-mode feedback 失效
标题翻译：具有共模反馈的全差分线路驱动电路
公开(公告)号：US5381112A
公开(公告)日：1995-01-10
申请号：US124684
申请日：1993-09-22
申请人： Mathew A. Rybicki , Todd L. Brooks
发明人： Mathew A. Rybicki , Todd L. Brooks
IPC分类号： H03F3/45
CPC分类号： H03F3/45121 , H03F3/45112 , H03F3/45654 , H03F3/45717 , H03F2203/45408 , H03F2203/45418 , H03F2203/45424
摘要： A fully differential line driver circuit (25) includes an input differential amplifier (26) and double-ended differential amplifiers (27, 28). A first output driver stage (29) includes a pair of series connected transistors (30, 31), and a second output driver stage includes a pair of series connected transistors (33, 34). The differential amplifiers (27, 28) provide bias and signals voltages to the gates of the series connected transistors (30, 31, 33, 34). The output stages (29, 32) provide differential output signals for driving a low impedance load. The clamping circuits (35-38) control overlap currents in the output stages (29, 32). Common-mode feedback is used to ensure a common-mode voltage of the differential output signals remains at a predetermined voltage to ensure maximum signal swing and thus, maximum efficiency.
摘要翻译：全差分线路驱动电路（25）包括输入差分放大器（26）和双端差分放大器（27,28）。第一输出驱动级（29）包括一对串联的晶体管（30,31），第二输出驱动级包括一对串联连接的晶体管（33,34）。差分放大器（27,28）向串联连接的晶体管（30,31,33,34）的栅极提供偏置和信号电压。输出级（29,32）提供用于驱动低阻抗负载的差分输出信号。钳位电路（35-38）控制输出级（29,32）中的重叠电流。共模反馈用于确保差分输出信号的共模电压保持在预定电压，以确保最大信号摆幅，从而达到最大的效率。

2. 发明授权

US4649352A Differential amplifier circuit 失效
标题翻译：差分放大电路
公开(公告)号：US4649352A
公开(公告)日：1987-03-10
申请号：US876641
申请日：1986-06-16
申请人： Robert A. Blauschild
发明人： Robert A. Blauschild
IPC分类号： H03F3/20 , H03F3/30 , H03F3/45
CPC分类号： H03F3/4521 , H03F3/3066 , H03F3/45121 , H03F2203/45028 , H03F2203/45031 , H03F2203/45224 , H03F2203/45232 , H03F2203/45244 , H03F2203/45294 , H03F2203/45366 , H03F2203/45398 , H03F2203/45471 , H03F2203/45612
摘要： An input portion (4, 6) of a differential amplifier circuit amplifies a differential input signal to produce an amplified signal between a pair of terminals. A summing section contains two complementary pairs of like-polarity amplifiers (13, 14 and 19, 20). Each has a first flow electrode, a second flow electrode, and a control electrode. A substantially constant bias voltage is supplied to the control electrodes of the first pair (13, 14) whose second electrodes are respectively coupled to the second electrodes of the second pair (19, 20). Their first electrodes are respectively coupled to the terminals and to corresponding impedance elements (11, 12). The control electrodes of the second pair are coupled together to receive a voltage dependent on the voltage at the second electrode of one (13) of the first pair so as to produce a representative output signal at the second electrode of the other (14) of the first pair.

3. 发明授权

US5523718A Balanced double-folded cascode operational amplifier 失效
标题翻译：平衡双折叠共源共栅放大器
公开(公告)号：US5523718A
公开(公告)日：1996-06-04
申请号：US439970
申请日：1995-05-12
申请人： James R. Butler
发明人： James R. Butler
IPC分类号： H03F3/30 , H03F3/45
CPC分类号： H03F3/4521 , H03F3/3067 , H03F3/45071 , H03F3/45121 , H03F2200/258 , H03F2203/45028 , H03F2203/45232 , H03F2203/45244 , H03F2203/45281 , H03F2203/45366 , H03F2203/45508 , H03F2203/45552 , H03F2203/45568
摘要： A double-folded cascode operational amplifier capable of operating with rail-to-rail common mode inputs includes two differential input transistor pairs of opposite conductivity, with an associated current source and input resistor pair for each pair of input transistors. Its gain stage includes two interconnected pairs of folded cascode gain transistors that are connected to the two pairs of input resistors so that a change in the differential input signal produces a corresponding change in the gain stage output via the resistors. An output stage includes transistor-resistor circuitry to bias a pair of output transistors in opposite directions and produce a net amplifier output at their junction. The gain transistor voltages are balanced by a voltage shifting circuit to inhibit input voltage offsets.
摘要翻译：能够用轨至轨共模输入操作的双折叠共源共栅运算放大器包括具有相反电导率的两个差分输入晶体管对，每对输入晶体管具有相关联的电流源和输入电阻器对。其增益级包括两对互连的折叠共源共栅增益晶体管，其连接到两对输入电阻器，使得差分输入信号的变化通过电阻器产生增益级输出的相应变化。输出级包括晶体管电阻器电路，用于在相反方向偏置一对输出晶体管，并在其结点产生净放大器输出。增益晶体管电压由电压移位电路平衡，以抑制输入电压偏移。

4. 发明授权

US5420540A Double-folded cascode operational amplifier 失效
标题翻译：双折叠共源共栅运算放大器
公开(公告)号：US5420540A
公开(公告)日：1995-05-30
申请号：US285066
申请日：1994-08-03
申请人： James R. Butler
发明人： James R. Butler
IPC分类号： H03F3/30 , H03F3/45
CPC分类号： H03F3/4521 , H03F3/3067 , H03F3/45071 , H03F3/45121 , H03F2200/258 , H03F2203/45028 , H03F2203/45232 , H03F2203/45244 , H03F2203/45281 , H03F2203/45366 , H03F2203/45508 , H03F2203/45552 , H03F2203/45568
摘要： A double-folded cascode operational amplifier capable of operating with rail-to-rail common mode inputs includes two differential input transistor pairs of opposite conductivity, with an associated current source and input resistor pair for each pair of input transistors. Its gain stage includes two interconnected pairs of folded cascode gain transistors that are connected to the two pairs of input resistors so that a change in the differential input signal produces a corresponding change in the gain stage output via the resistors. An output stage includes transistor-resistor circuitry to bias a pair of output transistors in opposite directions and produce a net amplifier output at their junction.
摘要翻译：能够用轨至轨共模输入操作的双折叠共源共栅运算放大器包括具有相反电导率的两个差分输入晶体管对，每对输入晶体管具有相关联的电流源和输入电阻器对。其增益级包括两对互连的折叠共源共栅增益晶体管，其连接到两对输入电阻器，使得差分输入信号的变化通过电阻器产生增益级输出的相应变化。输出级包括晶体管电阻器电路，用于在相反方向偏置一对输出晶体管，并在其结点产生净放大器输出。

5. 发明授权

US4463319A Operational amplifier circuit 失效
标题翻译：运算放大器电路
公开(公告)号：US4463319A
公开(公告)日：1984-07-31
申请号：US404580
申请日：1982-08-02
申请人： Mark B. Kearney
发明人： Mark B. Kearney
IPC分类号： H03F3/30 , H03F3/45
CPC分类号： H03F3/4521 , H03F3/3067 , H03F3/45121 , H03F3/4556 , H03F2203/45028 , H03F2203/45232 , H03F2203/45366
摘要： An operational amplifier includes a PNP differential amplifier operable for low common mode input voltages and an NPN differential amplifier operable for high common mode input voltages so that the operational amplifier is operable over a range of common mode input voltages that includes substantially the positive and negative supply voltages.
摘要翻译：运算放大器包括可用于低共模输入电压的PNP差分放大器和可操作用于高共模输入电压的NPN差分放大器，使得运算放大器可在大体上包括正和负电源的共模输入电压范围内工作电压。

6. 发明授权

US06965266B1 High voltage differential amplifier using low voltage devices 失效
标题翻译：高压差分放大器采用低压器件
公开(公告)号：US06965266B1
公开(公告)日：2005-11-15
申请号：US10775469
申请日：2004-02-10
申请人： Sumer Can
发明人： Sumer Can
IPC分类号： H03F3/45
CPC分类号： H03F3/45121
摘要： A high voltage differential amplifier including an input differential pair of low voltage transistors, a sense differential pair of low voltage transistors, first and second high voltage transistors, a low voltage bias transistor, a cascaded pair of low voltage transistors, and an output pair of high voltage transistors. The sense differential pair has a pair of control terminals that detect a common mode voltage of the differential input signal, and establishes a sense node which follows the common mode voltage. The first high voltage device is coupled to the sense node to establish bias node voltage levels which track the common mode voltage, including an output bias node biasing the output pair and a cascade bias node biasing the cascaded pair. In this manner, the terminals of the low voltage devices slide up or down with the common mode voltage and are protected from high voltage levels.
摘要翻译：一种高电压差分放大器，包括低压晶体管的输入差分对，低压晶体管的感测差分对，第一和第二高压晶体管，低压偏置晶体管，级联的一对低压晶体管，以及输出对高压晶体管。感测差分对具有检测差分输入信号的共模电压的一对控制端子，并建立跟随共模电压的感测节点。第一高压器件耦合到感测节点以建立跟踪共模电压的偏置节点电压电平，包括偏置输出对的输出偏置节点和偏置级联对的级联偏置节点。以这种方式，低压装置的端子以共模电压上下滑动并被保护而不受高电压电平的影响。

7. 发明授权

US5610557A Method and circuit for trimming an operational amplifier having dual input stages 失效
标题翻译：用于修整具有双输入级的运算放大器的方法和电路
公开(公告)号：US5610557A
公开(公告)日：1997-03-11
申请号：US480696
申请日：1995-06-07
申请人： William B. Jett, Jr.
发明人： William B. Jett, Jr.
IPC分类号： H03F3/30 , H03F3/45
CPC分类号： H03F3/4556 , H03F3/3067 , H03F3/45121 , H03F2203/45552 , H03F2203/45571 , H03F2203/45594 , H03F2203/45686
摘要： Circuitry is provided for a precision integrated circuit operational amplifier having a complementary pair of differential amplifiers in the input stage. Each differential amplifier is operable over a portion of the common-mode input range to provide a common-mode input range that includes both positive and negative power supply voltages. Methods are provided for trimming the operational amplifier to reduce the input offset voltage of each input stage differential amplifier which reduces the input offset voltage for the operational amplifier as a whole.
摘要翻译：电路设计用于具有输入级中的互补对差分放大器的精密集成电路运算放大器。每个差分放大器可在共模输入范围的一部分上工作，以提供包括正电源电压和负电源电压的共模输入范围。提供了用于修整运算放大器以减少每个输入级差分放大器的输入失调电压的方法，其降低了作为整体的运算放大器的输入失调电压。

8. 发明授权

US5294893A Differential output amplifier input stage with rail-to-rail common mode input range 失效
标题翻译：差分输出放大器输入级，具有轨到轨共模输入范围
公开(公告)号：US5294893A
公开(公告)日：1994-03-15
申请号：US968886
申请日：1992-10-30
申请人： Marc H. Ryat
发明人： Marc H. Ryat
IPC分类号： H03F3/45
CPC分类号： H03F3/4521 , H03F3/45121 , H03F3/45529 , H03F2203/45028 , H03F2203/45126 , H03F2203/45212 , H03F2203/45232 , H03F2203/45366 , H03F2203/45402 , H03F2203/45711
摘要： An amplifier having a rail-to-rail common mode input range that can be used in low voltage power supply applications includes differential input and output stages, the output stage having first and second current paths. First and second output duplicating circuits are respectively connected in parallel with the first and second current paths in the differential output stage to duplicate the differential output. A circuit for detecting a common-mode voltage difference is provided between nodes of the first and second output duplicating circuits for developing a current related to the common-mode voltage difference. A current mirror circuit is connected to receive the current related to the common-mode voltage difference for controlling the current in the first and second current paths in the differential output stage. The circuit for detecting a common-mode voltage difference between nodes of the first and second output duplicating circuits can be established by a transistor that senses only common-mode current. The transistor has a control element connected to the nodes in the output duplicating circuits and a current path to a supply voltage.
摘要翻译：具有可用于低电压电源应用的轨到轨共模输入范围的放大器包括差分输入和输出级，输出级具有第一和第二电流路径。第一和第二输出复制电路分别与差分输出级中的第一和第二电流路径并联连接以复制差分输出。在第一和第二输出复制电路的节点之间提供用于检测共模电压差的电路，用于产生与共模电压差有关的电流。连接电流镜电路以接收与共模电压差相关的电流，以控制差分输出级中的第一和第二电流路径中的电流。用于检测第一和第二输出复制电路的节点之间的共模电压差的电路可以由仅感测共模电流的晶体管建立。晶体管具有连接到输出复制电路中的节点的控制元件和到电源电压的电流路径。

9. 发明授权

US5153529A Rail-to-rail input stage of an operational amplifier 失效
标题翻译：运行放大器的轨至轨输入级
公开(公告)号：US5153529A
公开(公告)日：1992-10-06
申请号：US753128
申请日：1991-08-30
申请人： Rikki Koda , Robert L. Vyne , Thomas D. Petty
发明人： Rikki Koda , Robert L. Vyne , Thomas D. Petty
IPC分类号： H03F3/30 , H03F3/45
CPC分类号： H03F3/3067 , H03F3/45121 , H03F3/4556 , H03F3/45587 , H03F2203/45014 , H03F2203/45028 , H03F2203/45058 , H03F2203/45212 , H03F2203/45466 , H03F2203/45478 , H03F2203/45571 , H03F2203/45676 , H03F2203/45732
摘要： An input stage of an operational amplifier uses current sources to allow first and second differential input transistor pairs to operate near the power supply rails. The output stage of the operational amplifier also operates within a saturation potential of the power supply rails. The first differential input transistor pair operates when the input signal is less than a predetermined threshold, while the second differential input transistor pair operates when the input signal is greater than the predetermined threshold. A detection circuit at the input terminals prevents phase inversion of the output signal should the inputs be driven beyond the power supply rails. A current cancellation circuit removes current variation induced by voltage changes at the output of the input stage and provides high gain and low input offset voltage.
摘要翻译：运算放大器的输入级使用电流源来允许第一和第二差分输入晶体管对在电源轨附近操作。运算放大器的输出级也在电源轨的饱和电位内工作。当输入信号小于预定阈值时，第一差分输入晶体管对工作，而当输入信号大于预定阈值时第二差分输入晶体管对工作。如果输入被驱动超过电源轨，则输入端子处的检测电路防止输出信号的相位反转。电流消除电路消除由输入级输出端的电压变化引起的电流变化，并提供高增益和低输入失调电压。

10. 发明授权

US4555673A Differential amplifier with rail-to-rail input capability and controlled transconductance 失效
标题翻译：具有轨到轨输入能力和受控跨导的差分放大器
公开(公告)号：US4555673A
公开(公告)日：1985-11-26
申请号：US602231
申请日：1984-04-19
申请人： Johan H. Huijsing , Rudy J. van de Plassche
发明人： Johan H. Huijsing , Rudy J. van de Plassche
IPC分类号： H03F3/45
CPC分类号： H03F3/45219 , H03F3/45085 , H03F3/45121 , H03F3/45183 , H03F3/4556 , H03F3/45708
摘要： A differential amplifier operable between a pair of supply voltages that define a rail-to-rail supply range contains a pair of differential portions (20 and 22) that together provide representative signal amplification across the supply range, although neither differential portion individually does so. A current control (24) regulates operating currents (I.sub.N and I.sub.p) for the differential portions in such a way that the amplifier transconductance can be controlled in a desired manner as the common-mode part (V.sub.CM) of the amplifier input signal (V.sub.I+ and V.sub.I-) varies across the supply range. The transconductance is typically controlled to be largely constant. A summing circuit (26) selectively combines internal currents (I.sub.A, I.sub.B, I.sub.C, and I.sub.D) from the differential portions to generate at least one output signal (I.sub.O+ and I.sub.O-) representative of the input signal.
摘要翻译：限定轨至轨电源范围的一对电源电压之间可操作的差分放大器包含一对差分部分（20和22），这些差分部分（20和22）在整个电源范围内提供代表性的信号放大，尽管两个差分部分都不相同。电流控制（24）调节差分部分的工作电流（IN和Ip），使得放大器跨导可以以期望的方式被控制，作为放大器输入信号的共模部分（VCM）（VI +和 VI-）在供应范围内不同。跨导通常被控制在很大程度上恒定。求和电路（26）选择性地组合来自差分部分的内部电流（IA，IB，IC和ID）以产生表示输入信号的至少一个输出信号（IO +和IO-）。

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