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公开(公告)号：US09041466B2
公开(公告)日：2015-05-26
申请号：US13828647
申请日：2013-03-14
CPC分类号： H03F3/45076 , H03F1/0261 , H03F3/4508 , H03F2203/45244 , H03F2203/45294 , H03F2203/45394 , H03F2203/45481 , H03F2203/45542 , H03F2203/45621 , H03F2203/45731
摘要： Differential power amplifier circuitry includes a differential transistor pair, an input transformer, and biasing circuitry. The base contact of each transistor in the differential transistor pair may be coupled to the input transformer through a coupling capacitor. The coupling capacitors may be designed to resonate with the input transformer about a desired frequency range, thereby passing desirable signals to the differential transistor pair while blocking undesirable signals. The biasing circuitry may include a pair of emitter follower transistors, each coupled at the emitter to the base contact of each one of the transistors in the differential transistor pair and adapted to bias the differential transistor pair to maximize efficiency and stability.
摘要翻译： 差分功率放大器电路包括差分晶体管对，输入变压器和偏置电路。 差分晶体管对中的每个晶体管的基极接触可通过耦合电容耦合到输入变压器。 耦合电容器可以被设计为在输入变压器周围以期望的频率范围谐振，从而将期望的信号传递到差分晶体管对，同时阻止不期望的信号。 偏置电路可以包括一对射极跟随器晶体管，每个射极跟随器晶体管在发射极处耦合到差分晶体管对中的每个晶体管的基极接触，并且适于偏置差分晶体管对以最大化效率和稳定性。
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公开(公告)号：US4532479A
公开(公告)日：1985-07-30
申请号：US525181
申请日：1983-08-23
申请人： Robert A. Blauschild
发明人： Robert A. Blauschild
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： A differential amplifier circuit contains a pair of complementary input portions (3, 5 and 4, 6). The input portions amplify a common differential input signal to produce corresponding amplified differential signals which are supplied to a summing section that operates as a modulated current mirror to produce an output signal representative of the input signal. The summing section contains a pair of like-polarity first and second amplifiers (13 and 14) and a pair of like-polarity third and fourth amplifiers (19 and 20) complementary to the other amplifiers. A pair of impedance elements (11 and 12) are coupled between a first voltage supply (ground reference) and the third and fourth amplifiers. A pair of current sources, typically impedance elements (8 and 9), are coupled between a second voltage supply (+B) and the first and second amplifiers. An important feature of this circuit is that the output signal changes with the differential portion of the input signal as its common-mode portion varies over the entire voltage range between the levels of the supplies.
摘要翻译： 差分放大器电路包含一对互补输入部分（3,5和4,6）。 输入部分放大公共差分输入信号以产生相应的放大后的差分信号，该差分信号被提供给作为调制电流镜进行工作的求和部分，以产生表示输入信号的输出信号。 求和部分包含一对相同极性的第一和第二放大器（13和14）以及与其它放大器互补的一对相似极性的第三和第四放大器（19和20）。 一对阻抗元件（11和12）耦合在第一电压源（接地参考）和第三和第四放大器之间。 一对电流源（通常为阻抗元件8和9）耦合在第二电压源（+ B）和第一和第二放大器之间。 该电路的一个重要特征是输出信号随着输入信号的差分部分而变化，因为其共模部分在电源电平之间的整个电压范围内变化。
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公开(公告)号：US08878612B2
公开(公告)日：2014-11-04
申请号：US13944608
申请日：2013-07-17
CPC分类号： H03F3/16 , G05F3/262 , H03F3/193 , H03F3/245 , H03F3/45179 , H03F2200/555 , H03F2203/45294 , H03F2203/45301 , H03F2203/45304 , H03F2203/45311 , H03F2203/45352 , H03F2203/45544 , H03F2203/45554
摘要： A current mirror includes a bias branch, which includes first and second transistors in series between a voltage source and ground, a voltage divider coupled between the voltage source and ground, an op-amp configured to receive a divided voltage of the voltage divider and a voltage of a node between the first and second transistors, and drive a gate of the second transistor to pull the node to the divided voltage. The current mirror further includes a power amplifier core coupled to the bias branch. The power amplifier core includes first and second drive transistors configured in series between the voltage source and ground. Gates of the first transistor and the first drive transistor are coupled, and gates of the second transistor and the second drive transistor are coupled.
摘要翻译： 电流镜包括偏置分支，偏置分支包括串联在电压源和地之间的第一和第二晶体管，耦合在电压源和地之间的分压器，被配置为接收分压器的分压的运算放大器和 在第一和第二晶体管之间的节点的电压，并且驱动第二晶体管的栅极以将节点拉到分压。 电流镜还包括耦合到偏压分支的功率放大器芯。 功率放大器芯包括串联在电压源和地之间的第一和第二驱动晶体管。 第一晶体管和第一驱动晶体管的栅极耦合，并且第二晶体管和第二驱动晶体管的栅极耦合。
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公开(公告)号：US08130037B2
公开(公告)日：2012-03-06
申请号：US12730046
申请日：2010-03-23
申请人： Derek F. Bowers
发明人： Derek F. Bowers
IPC分类号： H03F3/45
CPC分类号： H03F1/302 , H03F3/45085 , H03F3/45089 , H03F2200/261 , H03F2200/555 , H03F2203/45294 , H03F2203/45622
摘要： An input bias current cancellation circuit includes reference transistors placed in series and a current summation network. The current summation network can be configured to sum the base currents of the reference transistors to produce a summed current. A current mirror can be provided to attenuate the summed current to produce input bias cancellation currents. The input bias cancellation currents can be provided to the base inputs of an input bipolar differential pair, thereby reducing input current noise.
摘要翻译： 输入偏置电流消除电路包括串联放置的参考晶体管和电流求和网络。 可以将当前求和网络配置为对参考晶体管的基极电流求和以产生求和电流。 可以提供电流镜来衰减总和电流以产生输入偏置消除电流。 可以将输入偏置消除电流提供给输入双极差分对的基极输入，从而降低输入电流噪声。
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公开(公告)号：US07521997B2
公开(公告)日：2009-04-21
申请号：US11938363
申请日：2007-11-12
申请人： Sung Ho Beck , Myung Woon Hwang
发明人： Sung Ho Beck , Myung Woon Hwang
IPC分类号： H03F3/45
CPC分类号： H03F3/4508 , H03F2200/91 , H03F2203/45271 , H03F2203/45294 , H03F2203/45306 , H03F2203/45631 , H03F2203/45702 , H03G1/0023
摘要： Provided is a low-power variable gain amplifier having a direct-current (DC) bias stabilizer. The low-power variable gain amplifier includes: a load block through which first and second load currents flow from a first source voltage; a first differential input signal source including a terminal connected to a second source voltage and the other terminal connected to a variable gain amplifying block and sinking currents corresponding to a value of a first differential input current signal; a second differential input signal source including a terminal connected to the second source voltage and the other terminal connected to the variable gain amplifying block and sinking currents corresponding to a value of a second differential input current signal; a variable gain amplifying block sinking first and second differential output current signals that are branch currents of the first and load currents, respectively, and first and second destructive-compensation current signals, in response to first and second gain control signals and the first and second differential input current signals; and the DC bias stabilizer processing the first and second destructive-compensation current signals and first and second bias currents that are branch currents of the first and second load currents, respectively, to enable the first and second load currents to include fixed DC current components, wherein the currents sunk to the first and second differential input signal sources include DC current components and AC current components, the DC current components of the first and second differential input signal sources have the same value, and the AC current components thereof have a phase difference of 180°.
摘要翻译： 提供了具有直流（DC）偏置稳定器的低功率可变增益放大器。 低功率可变增益放大器包括：第一和第二负载电流从第一源电压流过的负载块; 第一差分输入信号源，包括连接到第二源电压的端子和连接到可变增益放大块的另一端子和与第一差分输入电流信号的值相对应的吸收电流; 第二差分输入信号源，包括连接到第二源电压的端子，连接到可变增益放大块的另一端和与第二差分输入电流信号的值相对应的吸收电流; 可变增益放大块，分别作为第一和负载电流的分支电流以及第一和第二破坏补偿电流信号分别吸收作为第一和第二增益控制信号的第一和第二差分输出电流信号，以及第一和第二增益控制信号 差分输入电流信号; 并且所述DC偏置稳定器分别处理所述第一和第二破坏补偿电流信号以及作为所述第一和第二负载电流的分支电流的第一和第二偏置电流，以使得所述第一和第二负载电流能够包括固定的DC电流分量， 其中，所述第一和第二差分输入信号源的电流包括直流电流分量和交流电流分量，所述第一和第二差分输入信号源的直流电流分量具有相同的值，并且其交流电流分量具有相位差 180°。
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6.发明授权Trans-capacitance amplifier with picoAmperes input biasing and large output swing 有权具有picoAmperes输入偏置和大输出摆幅的跨电容放大器公开(公告)号：US08928409B1
公开(公告)日：2015-01-06
申请号：US13940261
申请日：2013-07-12
申请人： Ion E. Opris
发明人： Ion E. Opris
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/45475 , H03F3/45946 , H03F2200/153 , H03F2203/45114 , H03F2203/45294 , H03F2203/45408 , H03F2203/45512 , H03F2203/45521 , H03F2203/45674
摘要： According to some embodiments, a trans-capacitance amplifier is exhibiting an input current of the biasing in the range of picoAmperes while allowing large output swings. The trans-capacitance amplifier comprises an operational amplifier, a feedback capacitor, circuitry to DC bias and to AC ground the non-inverting input of the operational amplifier, and circuitry to DC bias the inverting input of the operational amplifier. According to some embodiments, the circuitry to bias the inverting input comprises a cascade of degenerated differential pairs. The first transistor of the first pair and the second transistor of the last pair have an active load. The cascade of differential pairs and the active load create a trans-conductance amplifier with a very low equivalent trans-conductance. According to some embodiments, the same invention applies to a differential trans-capacitance amplifier.
摘要翻译： 根据一些实施例，跨电容放大器在picoAmperes的范围内呈现偏置的输入电流，同时允许大的输出摆幅。 跨电容放大器包括运算放大器，反馈电容器，DC偏置电路和运算放大器的非反相输入端的AC接地，以及用于对运算放大器的反相输入进行DC偏置的电路。 根据一些实施例，偏置反相输入的电路包括退化差分对的级联。 第一对的第一晶体管和最后一对的第二晶体管具有有功负载。 差分对的级联和有源负载产生具有非常低的等效反电导的跨导放大器。 根据一些实施例，本发明适用于差分跨电容放大器。
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公开(公告)号：US20110234322A1
公开(公告)日：2011-09-29
申请号：US12730046
申请日：2010-03-23
申请人： Derek F. Bowers
发明人： Derek F. Bowers
IPC分类号： H03F3/04
CPC分类号： H03F1/302 , H03F3/45085 , H03F3/45089 , H03F2200/261 , H03F2200/555 , H03F2203/45294 , H03F2203/45622
摘要： An input bias current cancellation circuit includes reference transistors placed in series and a current summation network. The current summation network can be configured to sum the base currents of the reference transistors to produce a summed current. A current mirror can be provided to attenuate the summed current to produce input bias cancellation currents. The input bias cancellation currents can be provided to the base inputs of an input bipolar differential pair, thereby reducing input current noise.
摘要翻译： 输入偏置电流消除电路包括串联放置的参考晶体管和电流求和网络。 可以将当前求和网络配置为对参考晶体管的基极电流求和以产生求和电流。 可以提供电流镜来衰减总和电流以产生输入偏置消除电流。 可以将输入偏置消除电流提供给输入双极差分对的基极输入，从而降低输入电流噪声。
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公开(公告)号：US07843264B2
公开(公告)日：2010-11-30
申请号：US12021477
申请日：2008-01-29
申请人： Anosh B. Davierwalla , Chul Kyu Lee , Vannam Dang
发明人： Anosh B. Davierwalla , Chul Kyu Lee , Vannam Dang
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/45192 , H03F3/45766 , H03F2200/453 , H03F2200/456 , H03F2203/45028 , H03F2203/45048 , H03F2203/45286 , H03F2203/45291 , H03F2203/45294 , H03F2203/45624 , H03F2203/45628 , H03K5/2481
摘要： An amplifier with accurate input offset voltage is described. In one design, the amplifier includes first and second unbalanced differential pairs. The first unbalanced differential pair receives a differential input signal and provides a first differential current signal. The second unbalanced differential pair receives a differential reference signal and provides a second differential current signal, which is subtracted from the first differential current signal to obtain a differential output signal. The second differential current signal tracks an error current in the first differential current signal so that the differential output signal is zero when the differential input signal is equal to a target input offset voltage for the amplifier. For each unbalanced differential pair, one transistor is M times the size of the other transistor, with M being selected to obtain the target input offset voltage.
摘要翻译： 描述了具有精确输入失调电压的放大器。 在一种设计中，放大器包括第一和第二不平衡差分对。 第一不平衡差分对接收差分输入信号并提供第一差分电流信号。 第二不平衡差分对接收差分参考信号，并提供从第一差分电流信号中减去的第二差分电流信号，以获得差分输出信号。 第二差分电流信号跟踪第一差分电流信号中的误差电流，使得当差分输入信号等于放大器的目标输入失调电压时，差分输出信号为零。 对于每个不平衡差分对，一个晶体管是另一个晶体管尺寸的M倍，其中M被选择以获得目标输入偏移电压。
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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
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.
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公开(公告)号：US20130300506A1
公开(公告)日：2013-11-14
申请号：US13944608
申请日：2013-07-17
IPC分类号： H03F3/16
CPC分类号： H03F3/16 , G05F3/262 , H03F3/193 , H03F3/245 , H03F3/45179 , H03F2200/555 , H03F2203/45294 , H03F2203/45301 , H03F2203/45304 , H03F2203/45311 , H03F2203/45352 , H03F2203/45544 , H03F2203/45554
摘要： A current mirror includes a bias branch, which includes first and second transistors in series between a voltage source and ground, a voltage divider coupled between the voltage source and ground, an op-amp configured to receive a divided voltage of the voltage divider and a voltage of a node between the first and second transistors, and drive a gate of the second transistor to pull the node to the divided voltage. The current mirror further includes a power amplifier core coupled to the bias branch. The power amplifier core includes first and second drive transistors configured in series between the voltage source and ground. Gates of the first transistor and the first drive transistor are coupled, and gates of the second transistor and the second drive transistor are coupled.
摘要翻译： 电流镜包括偏置分支，偏置分支包括串联在电压源和地之间的第一和第二晶体管，耦合在电压源和地之间的分压器，被配置为接收分压器的分压的运算放大器和 在第一和第二晶体管之间的节点的电压，并且驱动第二晶体管的栅极以将节点拉到分压。 电流镜还包括耦合到偏压分支的功率放大器芯。 功率放大器芯包括串联在电压源和地之间的第一和第二驱动晶体管。 第一晶体管和第一驱动晶体管的栅极耦合，并且第二晶体管和第二驱动晶体管的栅极耦合。
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