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71. 发明授权

US07872531B1 Amplifier bias techniques 有权
标题翻译：放大器偏置技术
公开(公告)号：US07872531B1
公开(公告)日：2011-01-18
申请号：US12580979
申请日：2009-10-16
申请人： Vijayakumar Dhanasekaran
发明人： Vijayakumar Dhanasekaran
IPC分类号： H03F3/26
CPC分类号： H03F1/308 , H03F3/3027 , H03F2200/447
摘要： Techniques for generating a bias voltage for a class AB amplifier having first and second active transistors. In an exemplary embodiment, a diode-coupled first transistor supports a first current, and the gate voltage of the first transistor is coupled to the gate voltage of the first active transistor. The first current is split into a second current and a first auxiliary current supported by a second transistor, which is biased at a desired common-mode output voltage of the class AB amplifier. The first auxiliary current is further combined with a third current to be supported by a third transistor, with the third transistor configured to replicate the characteristic of the second active transistor. Further techniques are provided for setting the drain voltage of the third transistor to be close to the common-mode output voltage. The techniques described herein may be used to provide a bias voltage for the NMOS and/or PMOS active transistors in a class AB amplifier.
摘要翻译：用于产生具有第一和第二有源晶体管的AB类放大器的偏置电压的技术。在示例性实施例中，二极管耦合的第一晶体管支持第一电流，并且第一晶体管的栅极电压耦合到第一有源晶体管的栅极电压。第一电流被分为第二电流和由第二晶体管支持的第一辅助电流，第二电流被偏置在AB类放大器的期望的共模输出电压上。第一辅助电流进一步与由第三晶体管支持的第三电流组合，其中第三晶体管被配置为复制第二有源晶体管的特性。提供了进一步的技术来将第三晶体管的漏极电压设置为接近共模输出电压。本文描述的技术可以用于为AB类放大器中的NMOS和/或PMOS有源晶体管提供偏置电压。

72. 发明授权

US07804357B2 Distributed amplifier 有权
标题翻译：分布式放大器
公开(公告)号：US07804357B2
公开(公告)日：2010-09-28
申请号：US11238064
申请日：2005-09-29
申请人： Hisao Shigematsu
发明人： Hisao Shigematsu
IPC分类号： H03F3/26
CPC分类号： H03F3/604 , H03F3/3001 , H03F3/3022 , H03F3/3037 , H03F3/3042 , H03F3/3086 , H03F3/607 , H03F2203/30051 , H03F2203/30057
摘要： In order to allow to make compact a distributed amplifier by dispensing with any choke coil and reduce its cost, the distributed amplifier is configured such that it comprises an input side transmission line, an output side transmission line, and plural amplifier circuits connected to the input side transmission line and the output side transmission line, wherein push-pull amplifier circuits are employed as the amplifier circuits.
摘要翻译：为了通过分配任何扼流线圈来制造紧凑的分布式放大器并降低其成本，分布式放大器被配置为使得它包括输入侧传输线，输出侧传输线和连接到输入端的多个放大器电路侧传输线和输出侧传输线，其中使用推挽放大器电路作为放大器电路。

73. 发明授权

US07786804B2 Driving amplifier circuit with digital control and DC offset equalization 有权
标题翻译：具有数字控制和直流偏移均衡的驱动放大器电路
公开(公告)号：US07786804B2
公开(公告)日：2010-08-31
申请号：US12606194
申请日：2009-10-27
申请人： Uday Dasgupta
发明人： Uday Dasgupta
IPC分类号： H03F3/26
CPC分类号： H03F3/45475 , H03F3/45901 , H03F2203/45212 , H03F2203/45216 , H03F2203/45222 , H03F2203/45512 , H03F2203/45644 , H03F2203/45646 , H03F2203/45724
摘要： A driving amplifier circuit includes: a first driver for sourcing a load current to a load; a second driver for sinking the load current from the load; a first operational amplifier (op-amp) for driving the first driver; a second operational amplifier for driving the second driver; a first bias circuit for biasing the first driver; a second bias circuit for biasing the second driver; an enabling circuit for enabling either the first bias circuit or the second bias circuit according to a control signal; a digital control circuit for monitoring currents of the first driver and the second driver to generate the control signal; and an offset equalization circuit, coupled between an internal node of the first operational amplifier and an internal node of the second operational amplifier, for adjusting DC offset of at least one of the first operational amplifier and the second operational amplifier.
摘要翻译：驱动放大器电路包括：用于向负载提供负载电流的第一驱动器; 用于从负载中吸收负载电流的第二个驱动器; 用于驱动第一驱动器的第一运算放大器（运算放大器）; 用于驱动第二驱动器的第二运算放大器; 用于偏置第一驱动器的第一偏置电路; 用于偏置所述第二驱动器的第二偏置电路; 使能电路，用于根据控制信号启动第一偏置电路或第二偏置电路; 数字控制电路，用于监视第一驱动器和第二驱动器的电流以产生控制信号; 以及偏移均衡电路，耦合在所述第一运算放大器的内部节点和所述第二运算放大器的内部节点之间，用于调整所述第一运算放大器和所述第二运算放大器中的至少一个的DC偏移。

74. 发明申请

US20100164628A1 DISTRIBUTED ACTIVE TRANSFORMER AMPLIFIER WITH DIFFERENTIAL POWER COMBINER 有权
标题翻译：分布式有源变压器放大器与差分功率组合器
公开(公告)号：US20100164628A1
公开(公告)日：2010-07-01
申请号：US12648163
申请日：2009-12-28
申请人： Andrea Pallotta
发明人： Andrea Pallotta
IPC分类号： H03F3/24 , H03F3/26 , H03F3/60 , H01F27/28
CPC分类号： H03F3/604 , H03F1/0205 , H03F3/265 , H03F3/45179 , H03F2200/534 , H03F2200/537 , H03F2200/541
摘要： A power amplifier formed by a plurality of pairs of transistors, each pair including a first transistor and a second transistor having each a respective input terminal and a respective output terminal. The output terminals of the first and second transistors of each pair are connected to an output distributed active transformer connected to a differential output of the power amplifier. The input terminals of the first and second transistors of each pair are connected to an input distributed active transformer connected to an input of the power amplifier.
摘要翻译：由多对晶体管构成的功率放大器，每对晶体管包括第一晶体管和第二晶体管，每个晶体管具有各自的输入端和相应的输出端。每对的第一和第二晶体管的输出端连接到连接到功率放大器的差分输出的输出分布式有源变压器。每对的第一和第二晶体管的输入端连接到连接到功率放大器输入的输入分布式有源变压器。

75. 发明申请

US20090295482A1 DRIVING AMPLIFIER CIRCUIT WITH DIGITAL CONTROL 有权
标题翻译：驱动放大器电路与数字控制
公开(公告)号：US20090295482A1
公开(公告)日：2009-12-03
申请号：US12131138
申请日：2008-06-02
申请人： Uday Dasgupta , Alexander Tanzil
发明人： Uday Dasgupta , Alexander Tanzil
IPC分类号： H03F3/26
CPC分类号： H03F3/303 , H03F3/45475 , H03F3/72 , H03F2203/45648 , H03F2203/45674 , H03F2203/45711 , H03F2203/45724 , H03F2203/7206
摘要： A driving amplifier circuit includes: a first driver for souring a load current to a load; a second driver for sinking the load current from the load; a first operational amplifier (op-amp) coupled to a differential input signal for driving the first driver; a second operational amplifier coupled to the differential input signal for driving the second driver; a first bias circuit for biasing the first driver; a second bias circuit for biasing the second driver; an enabling circuit, coupled to the first bias circuit and the second bias circuit, for enabling either the first bias circuit or the second bias circuit according to a control signal; and a digital control circuit, coupled to the enabling circuit, for monitoring currents of the first driver and the second driver to generate the control signal.
摘要翻译：驱动放大器电路包括：第一驱动器，用于向负载提供负载电流; 用于从负载中吸收负载电流的第二个驱动器; 耦合到用于驱动第一驱动器的差分输入信号的第一运算放大器（运算放大器）; 耦合到用于驱动第二驱动器的差分输入信号的第二运算放大器; 用于偏置第一驱动器的第一偏置电路; 用于偏置所述第二驱动器的第二偏置电路; 耦合到第一偏置电路和第二偏置电路的使能电路，用于根据控制信号实现第一偏置电路或第二偏置电路; 以及耦合到使能电路的数字控制电路，用于监视第一驱动器和第二驱动器的电流以产生控制信号。

76. 发明申请

US20090091388A1 Apparatus for slew rate enhancement of an operational amplifier 有权
公开(公告)号：US20090091388A1
公开(公告)日：2009-04-09
申请号：US11907065
申请日：2007-10-09
申请人： Chung-Wei Yu
发明人： Chung-Wei Yu
IPC分类号： H03F3/45 , H03F3/26
CPC分类号： H03F3/3023 , H03F3/45192 , H03F3/45475 , H03F2200/78 , H03F2203/45248 , H03F2203/45352 , H03F2203/45366 , H03F2203/45646
摘要： The present invention discloses an apparatus for slew rate enhancement of an operational amplifier, wherein an auxiliary control device and an auxiliary output device are added to the output stage of an operational amplifier. The auxiliary control device mirrors the current of the output stage and then compares the mirrored current with a reference current to generate an auxiliary push/pull control signal, which is used to control the auxiliary output device. When the output signal is different from the input signal, the auxiliary control device turns on the auxiliary output device to provide an auxiliary output current for the output terminal. When the output signal is equal to the input signal, the auxiliary output device is turned off.

77. 发明授权

US07508260B2 Bypassable low noise amplifier topology with multi-tap transformer 有权
标题翻译：具有多抽头变压器的旁路低噪声放大器拓扑结构
公开(公告)号：US07508260B2
公开(公告)日：2009-03-24
申请号：US11941473
申请日：2007-11-16
申请人： Amitava Das
发明人： Amitava Das
IPC分类号： H03F1/14 , H03F3/26
CPC分类号： H03F1/14 , H03F1/26 , H03F1/30 , H03F1/56 , H03F1/565 , H03F3/45179 , H03F3/72 , H03F2200/222 , H03F2200/294 , H03F2200/372 , H03F2200/537 , H03F2203/45731 , H03G1/0088
摘要： An amplifier is disclosed that contains a transistor (BJT), a switch (MOSFET), and a transformer. The collector of the BJT is connected to an end of the transformer while the base of the BJT is connected to a point between the ends of the transformer through the MOSFET. When the amplifier is in an active mode in which the amplifier has gain, signals supplied to the amplifier are provided to the transformer through the BJT. When the amplifier is in a bypass mode in which the amplifier does not have gain, signals supplied to the amplifier are provided to the transformer through the MOSFET and the BJT is turned off. The amplifier is designed such that the amplifier characteristics are optimized and then the MOSFET is connected to the transformer such that the input impedance of the amplifier is independent of the mode.
摘要翻译：公开了一种包含晶体管（BJT），开关（MOSFET）和变压器的放大器。 BJT的集电极连接到变压器的一端，而BJT的基极通过MOSFET连接到变压器两端之间的点。当放大器处于放大器有增益的有效模式时，通过BJT将提供给放大器的信号提供给变压器。当放大器处于放大器不具有增益的旁路模式时，通过MOSFET将提供给放大器的信号提供给变压器，并关闭BJT。放大器的设计使得放大器特性得以优化，然后MOSFET连接到变压器，使得放大器的输入阻抗与模式无关。

78. 发明申请

US20090051431A1 HIGH-SWING OPERATIONAL AMPLIFIER OUTPUT STAGE USING ADAPTIVE BIASING 有权
标题翻译：使用自适应偏置的高电平运算放大器输出级
公开(公告)号：US20090051431A1
公开(公告)日：2009-02-26
申请号：US11844314
申请日：2007-08-23
申请人： Hayg-Taniel Dabag , Dongwon Seo , Manu Mishra
发明人： Hayg-Taniel Dabag , Dongwon Seo , Manu Mishra
IPC分类号： H03F3/26
CPC分类号： H03F3/45192 , H03F1/52 , H03F1/523 , H03F3/303 , H03F2203/30015 , H03F2203/30084 , H03F2203/30117 , H03F2203/45244 , H03F2203/45626 , H03F2203/45732
摘要： An output stage includes two transistors (switching transistor and biasing transistor) coupled in series in a pullup current path between a VDDA node and an output node, and also includes two transistors (switching transistor and biasing transistor) coupled in series in a pulldown current path between the output node and a ground node. Providing the biasing transistors reduces the maximum voltage dropped across the transistors, thereby allowing the transistors to have lower breakdown voltages than VDDA. An adaptive biasing circuit adjusts the gate voltage on a biasing transistor based on the output node voltage. If the output voltage is in a midrange, then the gate voltage is set farther away from a rail voltage in order to reduce voltage stress. If the output voltage is in a range closer to the rail voltage, then the gate voltage is set closer to the rail voltage, thereby facilitating rail-to-rail output voltage swings.
摘要翻译：输出级包括在VDDA节点和输出节点之间的上拉电流路径中串联耦合的两个晶体管（开关晶体管和偏置晶体管），并且还包括串联耦合在下拉电流路径中的两个晶体管（开关晶体管和偏置晶体管）在输出节点和接地节点之间。提供偏置晶体管降低了跨越晶体管的最大电压，从而允许晶体管具有比VDDA更低的击穿电压。自适应偏置电路基于输出节点电压来调节偏置晶体管上的栅极电压。如果输出电压处于中频范围，则栅极电压被设置得更远离轨道电压，以便减小电压应力。如果输出电压在更接近导轨电压的范围内，则栅极电压被设置为更接近导轨电压，从而便于轨至轨输出电压摆动。

79. 发明授权

US07484139B2 Amplifier fault detection circuit 有权
标题翻译：放大器故障检测电路
公开(公告)号：US07484139B2
公开(公告)日：2009-01-27
申请号：US11316319
申请日：2005-12-22
申请人： Robert Watts
发明人： Robert Watts
IPC分类号： G01R31/28 , G06F7/02 , H03F3/26 , H03F1/38 , H03F1/36 , H04B1/10
CPC分类号： H03F3/217 , H03F1/52 , H03F2200/331 , H03F2200/351 , H03F2200/426
摘要： An amplifier (1) adapted to receive an input signal and to generate an output signal at an amplifier output (7) according to the input signal, the amplifier (1) comprising: a feedback circuit arranged to provide a feedback signal indicative of the output signal; an error signal generating circuit (12, 44) arranged to receive the feedback signal and generate a digital error signal according to the feedback signal; and an output signal generating circuit arranged to generate the output signal and to receive the digital error signal and to adjust the output signal according to the digital error signal; the amplifier (1) further comprising: a fault detection circuit (50) arranged to receive the digital error signal and to determine the presence or absence of a fault condition at the amplifier output (7) according to the digital error signal and to provide a signal (54) indicative of the presence or absence of the fault condition.
摘要翻译：一种适于接收输入信号并根据输入信号在放大器输出（7）产生输出信号的放大器（1），放大器（1）包括：反馈电路，被配置为提供指示输出的反馈信号信号; 布置成接收反馈信号并根据反馈信号产生数字误差信号的误差信号发生电路（12,44）; 以及输出信号生成电路，被配置为产生所述输出信号并接收所述数字误差信号并根据所述数字误差信号调整所述输出信号; 所述放大器（1）还包括：故障检测电路（50），被布置成接收所述数字误差信号并且根据所述数字误差信号确定所述放大器输出（7）处的故障状况的存在或不存在，并且提供指示故障状况的存在或不存在的信号（54）。

80. 发明申请

US20090002071A1 Distributed Circular Geometry Power Amplifier Architecture 有权
标题翻译：分布式圆形几何功率放大器架构
公开(公告)号：US20090002071A1
公开(公告)日：2009-01-01
申请号：US12209944
申请日：2008-09-12
申请人： Ichiro Aoki , Seyed-Ali Hajimiri , David B. Rutledge , Scott David Kee
发明人： Ichiro Aoki , Seyed-Ali Hajimiri , David B. Rutledge , Scott David Kee
IPC分类号： H03F3/26
CPC分类号： H03F1/223 , H03F3/265 , H03F3/423 , H03F3/604 , H03F2200/534 , H03F2200/537 , H03F2200/541
摘要： The present invention discloses a distributed power amplifier topology and device that efficiently and economically enhances the power output of an RF signal to be amplified. The power amplifier comprises a plurality of push-pull amplifiers interconnected in a novel circular geometry that preferably function as a first winding of an active transformer having signal inputs of adjacent amplification devices driven with an input signal of equal magnitude and opposite phase. The topology also discloses the use of a secondary winding that matches the geometry of primary winding and variations thereof that serve to efficiently combine the power of the individual power amplifiers. The novel architecture enables the design of low-cost, fully-integrated, high-power amplifiers in the RF, microwave, and millimeter-wave frequencies.
摘要翻译：本发明公开了一种分布式功率放大器拓扑和器件，其有效且经济地增强待放大的RF信号的功率输出。功率放大器包括以新颖的圆形几何互连的多个推挽放大器，其优选地用作有源变压器的第一绕组，该有源变压器的信号输入由相等幅度和相反相位的输入信号驱动的相邻放大器件的信号输入。该拓扑还公开了使用与初级绕组的几何形状及其变化相匹配的次级绕组，其用于有效地组合各个功率放大器的功率。新颖的架构使得能够在RF，微波和毫米波频率中设计低成本，完全集成的大功率放大器。

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