知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

38 条记录 (耗时 0.013 秒)

    MILLER COMPENSATION CIRCUIT, AND CORRESPONDING REGULATOR, SYSTEM, AND METHOD
    1.
    发明申请
    MILLER COMPENSATION CIRCUIT, AND CORRESPONDING REGULATOR, SYSTEM, AND METHOD 审中-公开

    公开(公告)号：US20180059698A1

    公开(公告)日：2018-03-01

    申请号：US15454840

    申请日：2017-03-09

    申请人： STMICROELECTRONICS S.R.L.

    发明人： Nicola Rogledi

    IPC分类号： G05F1/575 ,  H03F3/45

    CPC分类号： G05F1/575 ,  H03F1/14 ,  H03F3/183 ,  H03F3/45475 ,  H03F2200/153 ,  H03F2203/45692

    摘要： A circuit with Miller compensation effect includes a first stage and a second stage, with a first terminal for receiving a bias current and a second terminal that can be coupled to ground, wherein the first stage includes a differential stage coupled via a coupling line to the second stage. The second stage includes a transistor with a Miller compensation network, which is set between the first terminal of the second stage and the control terminal of the aforesaid transistor. A compensation-control transistor, which is coupled to the second terminal of said differential stage, can be activated for coupling the aforesaid second terminal to ground, the compensation-control transistor having its control terminal coupled to the aforesaid coupling line between the first and second stages.

    VARIABLE-GAIN AMPLIFIER HAVING ERROR AMPLIFIER WITH CONSTANT LOOP GAIN
    3.
    发明申请
    VARIABLE-GAIN AMPLIFIER HAVING ERROR AMPLIFIER WITH CONSTANT LOOP GAIN 有权
    具有恒定环路增益的变差放大器的变差增益放大器

    公开(公告)号：US20050248404A1

    公开(公告)日：2005-11-10

    申请号：US11117071

    申请日：2005-04-27

    申请人： Barrie Gilbert

    发明人： Barrie Gilbert

    IPC分类号： H03F3/45 ,  H03G1/00

    CPC分类号： H03G1/0023 ,  H03F3/45 ,  H03F3/45085 ,  H03F2203/45466 ,  H03F2203/45566 ,  H03F2203/45682 ,  H03F2203/45692

    摘要： A translinear amplifier is disclosed. A loop amplifier drives the bases of the input and output transistor pairs from the differential collector voltage of the input pair. The loop amplifier contains a third differential pair (a gain pair). The tail current of the gain pair is inversely related to the tail current of the input pair, such that loop amplifier gain remains stable when the transconductance of the input pair changes (due, e.g., to input gain changes). In one embodiment, a linear-in-dB interface is provided that adjusts input pair tail current exponentially (and gain pair tail current exponentially and inversely) to linear voltage changes at a gain input.

    摘要翻译： 公开了一种跨线性放大器。 环路放大器从输入对的差分集电极电压驱动输入和输出晶体管对的基极。 环路放大器包含第三差分对（增益对）。 增益对的尾部电流与输入对的尾部电流成反比，使得当输入对的跨导改变（由于例如输入增益变化）时，环路放大器增益保持稳定。 在一个实施例中，提供了在增益输入处将输入对尾部电流指数地（和增益对尾部电流指数地和相反地）调整为线性电压变化的线性dB接口。

    Operational amplifiers having low-power unconditionally-stable common-mode feedback
    5.
    发明授权
    Operational amplifiers having low-power unconditionally-stable common-mode feedback 有权
    具有低功率无条件稳定共模反馈的运算放大器

    公开(公告)号：US07924095B2

    公开(公告)日：2011-04-12

    申请号：US12458630

    申请日：2009-07-17

    申请人： Ahmad Yazdi ,  Ahmad Mirzaei ,  Hooman Darabi

    发明人： Ahmad Yazdi ,  Ahmad Mirzaei ,  Hooman Darabi

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45183 ,  H03F3/4565 ,  H03F2203/45008 ,  H03F2203/45082 ,  H03F2203/45406 ,  H03F2203/45692

    摘要： An operational amplifier is provided. The operational amplifier includes a first transistor configured to receive a first input voltage, a second transistor configured to receive a second input voltage, and a current steering module coupled to first and second transistors and configured to receive a reference voltage. The first and second transistors form a differential pair. The first transistor, second transistor, and current steering module are configured such that a current is steered from the current steering module or to the current steering module based on common-mode voltages of the first and second input voltages and the reference voltage to set a common-mode output voltage of the operational amplifier.

    摘要翻译： 提供运算放大器。 运算放大器包括被配置为接收第一输入电压的第一晶体管，被配置为接收第二输入电压的第二晶体管，以及耦合到第一和第二晶体管并被配置为接收参考电压的电流导向模块。 第一和第二晶体管形成差分对。 第一晶体管，第二晶体管和电流转向模块被配置成使得电流基于第一和第二输入电压和参考电压的共模电压被转向从当前转向模块或当前转向模块，以将 运算放大器的共模输出电压。

    Analog circuit, electronic instrument, and operational amplifier
    6.
    发明申请
    Analog circuit, electronic instrument, and operational amplifier 有权
    模拟电路，电子仪器和运算放大器

    公开(公告)号：US20080111627A1

    公开(公告)日：2008-05-15

    申请号：US11979820

    申请日：2007-11-08

    申请人： Akihiro Fukuzawa

    发明人： Akihiro Fukuzawa

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45183 ,  G01C19/5607 ,  G01C19/5649 ,  H03F1/0205 ,  H03F1/26 ,  H03F3/45475 ,  H03F2200/171 ,  H03F2200/261 ,  H03F2200/372 ,  H03F2203/45138 ,  H03F2203/45692 ,  H03H11/04 ,  H03H19/004

    摘要： An analog circuit includes a first circuit including a first-type operational amplifier of which a frequency of an amplification target signal is a first frequency, and a second circuit including a second-type operational amplifier of which a frequency of an amplification target signal is a second frequency lower than the first frequency. When a channel width and a channel length of a differential-stage transistor of a differential section of the first-type operational amplifier are respectively referred to as W1a and L1a, a bias current flowing through the differential section is referred to as Ia, a channel width and a channel length of a differential-stage transistor of a differential section of the second-type operational amplifier are respectively referred to as W1b and L1b, and a bias current flowing through the differential section is referred to as Ib, W1b×L1b>W1a×L1a and Ia>Ib are satisfied.

    摘要翻译： 模拟电路包括第一电路，其包括放大目标信号的频率为第一频率的第一类型运算放大器，以及包括放大目标信号的频率为第一频率的第二类型运算放大器的第二电路 第二频率低于第一频率。 当第一型运算放大器的差动部分的差分级晶体管的沟道宽度和沟道长度分别被称为W 1 a和L 1 a时，流过差分部分的偏置电流被称为 如图1a所示，第二类运算放大器的差分部分的差分级晶体管的沟道宽度和沟道长度分别被称为W 1 b和L 1 b，并且参考流过差分部分的偏置电流 至Ib，W 1 bxL 1 b> W 1 axL 1a和Ia> Ib。

    Subtractor circuit and power detector arrangement having that subtractor circuit
    8.
    发明申请
    Subtractor circuit and power detector arrangement having that subtractor circuit 失效
    具有减法器电路的减法器电路和功率检测器装置

    公开(公告)号：US20060017499A1

    公开(公告)日：2006-01-26

    申请号：US11172095

    申请日：2005-06-30

    申请人： Gunter Donig

    发明人： Gunter Donig

    IPC分类号： H03F3/45

    CPC分类号： H03F1/22 ,  H03F3/45085 ,  H03F2203/45352 ,  H03F2203/45471 ,  H03F2203/45476 ,  H03F2203/45632 ,  H03F2203/45692

    摘要： A subtractor circuit which provides, at an output, a signal that is proportional to the difference, which is applied to the input, between two signal levels is specified. Formed at the output of an operational amplifier of the subtractor circuit are two synchronous signal sources, one of which is used for feedback from one of the two identical outputs to an input of the operational amplifier. In accordance with the proposed principle, a feedback resistor which is normally present in analog subtractor circuits is avoided. The altered voltage swing at the output of the operational amplifier makes it possible to operate the latter without a negative supply voltage. The subtractor circuit described is particularly suited to power detection using an input-side power detector.

    摘要翻译： 指定在输出端提供与施加到两个信号电平之间的差异成比例的信号的减法器电路。 在减法器电路的运算放大器的输出端形成两个同步信号源，其中一个用于从两个相同输出中的一个到运算放大器的输入的反馈。 根据所提出的原理，避免了通常存在于模拟减法器电路中的反馈电阻器。 在运算放大器的输出端改变的电压摆幅可以在没有负电源电压的情况下运行。 所描述的减法器电路特别适用于使用输入侧功率检测器的功率检测。

    CMOS Operational amplifier with reduced power dissipation
    9.
    发明授权
    CMOS Operational amplifier with reduced power dissipation 失效
    CMOS运算放大器，功耗降低

    公开(公告)号：US4284957A

    公开(公告)日：1981-08-18

    申请号：US80153

    申请日：1979-09-28

    申请人： Yusuf A. Haque

    发明人： Yusuf A. Haque

    IPC分类号： H03F3/16 ,  H03F3/18 ,  H03F3/26 ,  H03F3/30 ,  H03F3/45

    CPC分类号： H03F3/45179 ,  H03F3/3001 ,  H03F3/3008 ,  H03F3/3025 ,  H03F3/45183 ,  H03F2203/30018 ,  H03F2203/30033 ,  H03F2203/30036 ,  H03F2203/45188 ,  H03F2203/45224 ,  H03F2203/45508 ,  H03F2203/45674 ,  H03F2203/45692

    摘要： An operational amplifier of MOSFET elements is disclosed which provides for a variable drive for an output stage that results in lower power dissipation and increased gain factor over comparable circuits using constant bias drive for the output stage. A bias section comprised of complementary MOS elements is connected to a single MOSFET that furnishes constant current to the signal input section of a differential amplifier section. The output of this differential amplifier is furnished by one path directly to one complementary MOSFET element of a high impedance output stage and by another path to a level shift section which provides an output to a second complementary MOSFET element of the output stage. Thus, the circuit functions under class A-B operation at low power dissipation and provides high open loop gain. Additional embodiments of the invention utilize three MOSFET elements in the level shift section or an additional output stage having an NPN transistor in combination with an N-channel MOSFET.

    摘要翻译： 公开了MOSFET元件的运算放大器，其为输出级提供可变驱动，其导致较低的功率耗散，并且在使用用于输出级的恒定偏置驱动的可比较电路上增加增益系数。 由互补MOS元​​件构成的偏置部分连接到向差分放大器部分的信号输入部分提供恒定电流的单个MOSFET。 该差分放大器的输出由一个路径直接提供给高阻抗输出级的一个互补MOSFET元件，并通过另一路径提供给电平移位部分，该电平移位部分向输出级的第二互补MOSFET元件提供输出。 因此，电路在低功耗下工作在A-B类以下，提供高开环增益。 本发明的另外的实施例利用电平移位部分中的三个MOSFET元件或者具有与N沟道MOSFET组合的NPN晶体管的附加输出级。