公开(公告)号：US5323120A

公开(公告)日：1994-06-21

申请号：US472

申请日：1993-01-05

Applicant: Marc H. Ryat

Inventor： Marc H. Ryat

IPC: H03F3/45

CPC classification number: H03F3/45112 ,  H03F3/4521 ,  H03F3/4556 ,  H03F3/45708

Abstract: A differential input stage for an operational transconductance amplifier is provided with complementary input transistor pairs. For each pair, a diode dummy load is provided. When the common mode input signal is near the positive or negative supply voltage, one of the pairs turns off. The diode loads act to increase the current through the other pair when this occurs. This results in the provision of a constant transconductance over the entire common mode input range.

Abstract translation: 用于运算跨导放大器的差分输入级具有互补输入晶体管对。 对于每一对，提供二极管虚拟负载。 当共模输入信号接近正或负电源电压时，其中一对关断。 当这种情况发生时，二极管负载起到增加另一对电流的作用。 这导致在整个共模输入范围内提供恒定跨导。

公开(公告)号：US5140280A

公开(公告)日：1992-08-18

申请号：US753129

申请日：1991-08-30

Applicant: Robert L. Vyne ,  Thomas D. Petty ,  Rikki Koda

Inventor： Robert L. Vyne ,  Thomas D. Petty ,  Rikki Koda

IPC: H03F3/30 ,  H03F3/45

CPC classification number: H03F3/3067 ,  H03F3/45121 ,  H03F3/4556 ,  H03F3/45587 ,  H03F2203/45571 ,  H03F2203/45676 ,  H03F2203/45732

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US4580106A

公开(公告)日：1986-04-01

申请号：US588373

申请日：1984-03-12

Applicant: Eric A. Vittoz

Inventor： Eric A. Vittoz

IPC: H03F3/193 ,  H01L21/8222 ,  H01L21/8249 ,  H01L27/06 ,  H03F3/45

CPC classification number: H03F3/4556 ,  H03F2203/45408 ,  H03F2203/45424

Abstract: There is disclosed a differential amplifier which comprises bipolar transistors which may be produced using MOS technology and wherein the amplifier is particularly useful when the transistors have a poorly defined current gain. The amplifier includes a first pair of transistors having emitters connected in common and having bases forming the inputs to the differential amplifier. A second pair of transistors identical to the first pair are coupled such that the emitters and bases of said second pair are connected respectively to the emitters and bases of the first pair. The collectors of the second pair of transistors are connected to a current generator and to the input of a transconductance amplifier such that the transconductance amplifier causes the sum of the emitter currents of the first and second pairs of transistors to be controlled by the current supplied by the current generator.

Abstract translation: 公开了一种差分放大器，其包括可以使用MOS技术产生的双极晶体管，并且其中当晶体管具有不良限定的电流增益时，该放大器特别有用。 放大器包括第一对晶体管，其具有共同连接的发射极，并且具有形成到差分放大器的输入的基极。 与第一对相同的第二对晶体管被耦合，使得所述第二对的发射极和基极分别连接到第一对的发射极和基极。 第二对晶体管的集电极连接到电流发生器和跨导放大器的输入端，使得跨导放大器使得第一和第二对晶体管的发射极电流的和通过由 电流发电机。

公开(公告)号：US3497824A

公开(公告)日：1970-02-24

申请号：US3497824D

申请日：1967-08-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： GOORDMAN ROBERT V

IPC: H03F3/45 ,  H03F3/68

CPC classification number: H03F3/4556 ,  H03F3/45085 ,  H03F3/45139 ,  H03F2203/45401 ,  H03F2203/45594 ,  H03F2203/45702

公开(公告)号：US06963244B1

公开(公告)日：2005-11-08

申请号：US10736110

申请日：2003-12-12

Applicant: Nathan R. Carter

Inventor： Nathan R. Carter

IPC: H03F1/32 ,  H03F3/45

CPC classification number: H03F3/45116 ,  H03F1/3211 ,  H03F3/45089 ,  H03F3/45484 ,  H03F3/4556 ,  H03F2203/45366 ,  H03F2203/45471

Abstract: A common mode linearized input stage comprises NPN and PNP differential pairs biased with respective tail currents at respective common emitter nodes, with each pair connected to receive a differential input signal. A tail current modulation circuit generates complementary output currents as a function of the voltage difference between the common emitter nodes, and first and second tail current sources generate the tail currents as a function of the complementary output currents. The tail current modulation circuit and the first and second tail current sources are arranged such that the magnitudes of the tail currents increase with an increasing differential input signal.

Abstract translation: 共模线性化输入级包括NPN和PNP差分对，它们在相应的共发射极节点处以相应的尾电流偏置，每对连接以接收差分输入信号。 尾电流调制电路产生作为公共发射极节点之间的电压差的函数的互补输出电流，并且第一和第二尾电流源产生作为互补输出电流的函数的尾电流。 尾电流调制电路和第一和第二尾电流源被布置成使得尾电流的大小随着差分输入信号的增加而增加。

公开(公告)号：US20020067210A1

公开(公告)日：2002-06-06

申请号：US09950438

申请日：2001-09-10

Inventor： Gunter Donig

IPC: H03F001/52

CPC classification number: H03F1/52 ,  H03F3/45085 ,  H03F3/4556 ,  H03F2203/45418 ,  H03F2203/45431 ,  H03F2203/45458 ,  H03F2203/45464 ,  H03F2203/45471 ,  H03F2203/45508

Abstract: An amplifier circuit having an amplifier stage is specified, in which, in order to avoid breakdown effects in the transistors thereof, an in-phase regulator is provided which, on the load side, is connected on the one hand to the amplifier stage and on the other hand to a reference-ground potential terminal, and which limits the voltage dropped across the amplifier stage. The in-phase regulator on the reference-ground potential side also enables the use of standard components at high supply voltages. The amplifier circuit can be used for example as a radio frequency output stage.

Abstract translation: 具有放大器级的放大器电路，其中为了避免其晶体管中的击穿效应，提供了一个同相调节器，其在负载侧一方面连接到放大器级并且接通 另一方面涉及到参考地电位端子，并且限制放大器级上的电压。 基准电位侧的同相调节器也可以在高电源电压下使用标准组件。 放大器电路可以例如用作射频输出级。

公开(公告)号：US06278326B1

公开(公告)日：2001-08-21

申请号：US09692370

申请日：2000-10-19

Applicant: Kenneth W. Murray ,  Joel M. Halbert

Inventor： Kenneth W. Murray ,  Joel M. Halbert

IPC: H03F304

CPC classification number: H03F3/3079 ,  H03F3/3066 ,  H03F3/3076 ,  H03F3/3081 ,  H03F3/343 ,  H03F3/45139 ,  H03F3/45152 ,  H03F3/45475 ,  H03F3/45502 ,  H03F3/4556 ,  H03F3/456 ,  H03F3/45609 ,  H03F3/45937

Abstract: A current mirror circuit in accordance with the present invention overcomes many shortcomings of the prior art. A current mirror circuit for providing a current reference signal suitably includes at least one degeneration resistor to provide more degeneration for lower voltage noise while also including at least one clamping device to preventing saturation of the current mirror. The clamping device suitably comprises at least one diode, such as, for example, a Schottky-type diode. Moreover, the clamping device can be suitably configured to facilitate a higher slew rate of the current mirror circuit.

Abstract translation: 根据本发明的电流镜电路克服了现有技术的许多缺点。 用于提供电流参考信号的电流镜电路适当地包括至少一个退化电阻器，以为较低电压噪声提供更多的退化，同时还包括至少一个钳位装置以防止电流镜的饱和。 钳位装置适当地包括至少一个二极管，例如肖特基型二极管。 此外，夹持装置可以适当地构造成有助于电流镜电路的更高的转换速率。

公开(公告)号：US6275110B2

公开(公告)日：2001-08-14

申请号：US75670401

申请日：2001-01-10

Applicant: NORTEL NETWORKS LTD

Inventor： KUNG WILLIAM

IPC: H03F3/45

CPC classification number: H03F3/4556 ,  H03F2203/45454

Abstract: A conventional differential transistor pair is provided with a dynamic bias circuit. The input voltage signal for the differential pair is also full-wave rectified and the rectified signal is used to bias dynamically the differential pair while the input voltage signal is being applied. One or more bias transistors having a control electrode fed with the rectified signal is connected in series with the differential pair. The result is that as the input signal magnitude increases the amount of bias increases dynamically and increases linearly for larger signals. Desired responses other than linearity can be achieved by making the signal that is fed to the rectifier vary according to any predetermined function.

Abstract translation: 常规的差分晶体管对具有动态偏置电路。 差分对的输入电压信号也是全波整流，整流信号用于在施加输入电压信号时动态地偏置差分对。 具有馈送有整流信号的控制电极的一个或多个偏置晶体管与差分对串联。 结果是，随着输入信号幅度的增加，偏置量的动态增加并且对于较大的信号而言线性增加。 可以通过使得馈送到整流器的信号根据任何预定功能而变化来实现除线性之外的期望响应。

公开(公告)号：US20010001232A1

公开(公告)日：2001-05-17

申请号：US09756704

申请日：2001-01-10

Inventor： William Kung

IPC: H03F003/45

CPC classification number: H03F3/4556 ,  H03F2203/45454

Abstract: A conventional differential transistor pair is provided with a dynamic bias circuit. The input voltage signal for the differential pair is also full-wave rectified and the rectified signal is used to bias dynamically the differential pair while the input voltage signal is being applied. One or more bias transistors having a control electrode fed with the rectified signal is connected in series with the differential pair. The result is that as the input signal magnitude increases the amount of bias increases dynamically and increases linearly for larger signals. Desired responses other than linearity can be achieved by making the signal that is fed to the rectifier vary according to any predetermined function.

公开(公告)号：US5729177A

公开(公告)日：1998-03-17

申请号：US574027

申请日：1995-12-18

Applicant: Frederic Goutti

Inventor： Frederic Goutti

IPC: H03F1/22 ,  H03F3/30 ,  H03F3/34 ,  H03F3/45 ,  H03F3/72

CPC classification number: H03F3/4556 ,  H03F3/3066 ,  H03F3/45121 ,  H03F3/45565 ,  H03F3/72 ,  H03F2203/45028 ,  H03F2203/45302

Abstract: An amplifier includes two complementary differential input stages and a first current source that is switched as a function of the input voltage of the amplifier in order to render active one or the other of the input stages by establishing the quiescent current of the input stage. A folded cascode stage has two cascode transistors whose currents are determined by a bias voltage of these transistors and reduced by the currents circulating in the output branches of a first of the differential input stages. Circuitry switched at the same time as the first current source for maintaining a constant current in the cascode transistors when one of the differential stages changes between an active state and an inactive state.

Abstract translation: 放大器包括两个互补的差分输入级和作为放大器的输入电压的函数被切换的第一电流源，以便通过建立输入级的静态电流来呈现活动的一个或另一个输入级。 折叠的共源共栅级具有两个共源共栅晶体管，其电流由这些晶体管的偏置电压确定，并被在第一差分输入级的输出分支中循环的电流减小。 与第一电流源同时切换电路，当一个差分级在激活状态和非活动状态之间变化时，在共源共栅晶体管中维持恒定电流。