公开(公告)号：US20180117630A1

公开(公告)日：2018-05-03

申请号：US15586777

申请日：2017-05-04

申请人： STMicroelectronics S.r.l.

发明人： Giuseppe Calcagno ,  Domenico Cristaudo ,  Stefano Corradi

IPC分类号： B06B1/02 ,  H03G3/20 ,  H03F3/45 ,  H03F1/02 ,  B06B1/06

CPC分类号： B06B1/0215 ,  B06B1/0603 ,  B06B1/0644 ,  H03F1/02 ,  H03F1/0233 ,  H03F1/0255 ,  H03F3/45 ,  H03F3/45475 ,  H03F2203/45248 ,  H03G1/00 ,  H03G3/001 ,  H03G3/007 ,  H03G3/20 ,  H03G2201/40

摘要： A differential amplifier generates an output voltage waveform exhibiting a slew rate over a rise time. The amplifier is powered from a dc voltage input and includes a set of differential pairs having a bias current flowing therethrough and a Miller compensation capacitance. A comparator functions to compare a voltage at the dc voltage input against a reference voltage in order to detect when the voltage drops below the reference voltage. A gain stage controls the gain of the differential amplifier and a bias current control circuit controls the bias current of the differential amplifier. In response to the detection by the comparator of the voltage dropping below the reference voltage, the gain stage and the bias current control circuit decrease the gain of the amplifier and jointly decrease the bias current in order to maintain a value of the rise time.

公开(公告)号：US09859857B2

公开(公告)日：2018-01-02

申请号：US15488365

申请日：2017-04-14

申请人： FCI Inc.

发明人： SeongHun Jeong

IPC分类号： H04B1/06 ,  H03F3/45 ,  H03G3/30 ,  H03F3/189

CPC分类号： H03G3/3052 ,  H03F3/19 ,  H03F3/45475 ,  H03F3/45973 ,  H03F2200/294 ,  H03F2203/45521 ,  H03G3/001 ,  H03G3/3068 ,  H03G2201/202 ,  H03G2201/40

摘要： Disclosed herein is a DC offset cancellation circuit. The DC offset cancellation circuit includes a DC feedback unit configured to vary a DC feedback (DCFB) bandwidth to add at least one mid-bandwidth to the DCFB bandwidth and to provide a delay time in each case in order to reduce the DC droop error that occurs in switching from the high bandwidth (BW) to the mid-BW or from the mid-BW mode to the low BW mode, such that stable settling is ensured.

公开(公告)号：US06982594B2

公开(公告)日：2006-01-03

申请号：US10712136

申请日：2003-11-13

申请人： James R. Snider ,  Jason D. Millard

发明人： James R. Snider ,  Jason D. Millard

IPC分类号： H03G3/20

CPC分类号： H03G3/3047 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40

摘要： A power control loop for a power amplifier is disclosed. Embodiments of the power control loop include deriving a secondary control signal. The secondary control signal may be used to control a gain applied to the power signal in the power control loop and to control a supply current or voltage delivered to a power amplifier.

摘要翻译： 公开了一种用于功率放大器的功率控制回路。 功率控制回路的实施例包括导出辅助控制信号。 辅助控制信号可以用于控制施加到功率控制回路中的功率信号的增益，并且控制传递到功率放大器的电源电流或电压。

公开(公告)号：US20050206456A1

公开(公告)日：2005-09-22

申请号：US11130120

申请日：2005-05-17

申请人： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

发明人： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

IPC分类号： H01L27/04 ,  H01L21/822 ,  H01L27/06 ,  H03F1/30 ,  H03F3/193 ,  H03F3/20 ,  H03F3/213 ,  H03F3/24 ,  H03F3/68 ,  H03G3/30 ,  H04B1/03 ,  H04B1/04

CPC分类号： H01L27/0629 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/49111 ,  H01L2224/49175 ,  H01L2924/13091 ,  H03F1/301 ,  H03F3/193 ,  H03F2200/294 ,  H03F2200/372 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40 ,  H01L2924/00014 ,  H01L2924/00

摘要： The number of components of a high frequency power amplifier is reduced. A bias resistance ratio is adjusted in accordance with a change in the threshold voltage Vth of a transistor. A high frequency power amplifier has a plurality of amplifying systems. Each of these systems has an input terminal to which a signal to be amplified is supplied, an output terminal, a bias terminal, a plurality of amplifying stages which are sequentially cascaded between the input and output terminals, and a bias circuit connected to the bias terminal and each of the amplifying stages to apply a bias potential to the amplifying stage. The amplifying stage includes a control terminal for receiving an input signal and the bias potential supplied to the stage and a first terminal for transmitting an output signal of the stage.

摘要翻译： 高频功率放大器的组件数量减少。 根据晶体管的阈值电压Vth的变化来调整偏置电阻比。 高频功率放大器具有多个放大系统。 这些系统中的每一个都具有供给要被放大的信号的输入端子，输出端子，偏置端子，在输入和输出端子之间顺序级联的多个放大级，以及连接到偏置电路的偏置电路 端子和每个放大级以向放大级施加偏置电位。 放大级包括用于接收输入信号和提供给级的偏置电位的控制端子和用于发送级的输出信号的第一端子。

公开(公告)号：US06900694B2

公开(公告)日：2005-05-31

申请号：US10799673

申请日：2004-03-15

申请人： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

发明人： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

IPC分类号： H01L27/04 ,  H01L21/822 ,  H01L27/06 ,  H03F1/30 ,  H03F3/193 ,  H03F3/20 ,  H03F3/213 ,  H03F3/24 ,  H03F3/68 ,  H03G3/30 ,  H04B1/03 ,  H04B1/04 ,  H03G5/16

CPC分类号： H01L27/0629 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/49111 ,  H01L2224/49175 ,  H03F1/301 ,  H03F3/193 ,  H03F2200/294 ,  H03F2200/372 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40 ,  H01L2924/00014

摘要： The number of components of a high frequency power amplifier is reduced. A bias resistance ratio is adjusted in accordance with a change in the threshold voltage Vth of a transistor. A high frequency power amplifier has a plurality of amplifying systems. Each of these systems has an input terminal to which a signal to be amplified is supplied, an output terminal, a bias terminal, a plurality of amplifying stages which are sequentially cascaded between the input and output terminals, and a bias circuit connected to the bias terminal and each of the amplifying stages to apply a bias potential to the amplifying stage. The amplifying stage includes a control terminal for receiving an input signal and the bias potential supplied to the stage and a first terminal for transmitting an output signal of the stage.

公开(公告)号：US06731167B2

公开(公告)日：2004-05-04

申请号：US09961250

申请日：2001-09-25

申请人： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

发明人： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

IPC分类号： H03G516

CPC分类号： H01L27/0629 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/49111 ,  H01L2224/49175 ,  H03F1/301 ,  H03F3/193 ,  H03F2200/294 ,  H03F2200/372 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40 ,  H01L2924/00014

摘要： The number of components of a high frequency power amplifier is reduced. A bias resistance ratio is adjusted in accordance with a change in the threshold voltage Vth of a transistor. A high frequency power amplifier has a plurality of amplifying systems. Each of these systems has an input terminal to which a signal to be amplified is supplied, an output terminal, a bias terminal, a plurality of amplifying stages which are sequentially cascaded between the input and output terminals, and a bias circuit connected to the bias terminal and each of the amplifying stages to apply a bias potential to the amplifying stage. The amplifying stage includes a control terminal for receiving an input signal and the bias potential supplied to the stage and a first terminal for transmitting an output signal of the stage.

摘要翻译： 高频功率放大器的组件数量减少。 根据晶体管的阈值电压Vth的变化来调整偏置电阻比。 高频功率放大器具有多个放大系统。 这些系统中的每一个都具有供给要被放大的信号的输入端子，输出端子，偏置端子，在输入和输出端子之间顺序级联的多个放大级，以及连接到偏置的偏置电路 端子和每个放大级以向放大级施加偏置电位。 放大级包括用于接收输入信号和提供给级的偏置电位的控制端子和用于发送级的输出信号的第一端子。

公开(公告)号：US09917549B1

公开(公告)日：2018-03-13

申请号：US14456975

申请日：2014-08-11

申请人： Skyworks Solutions, Inc.

发明人： Wade C. Allen

IPC分类号： H03F3/04 ,  H03F1/02 ,  H03F3/19 ,  H03F3/10

CPC分类号： H03F3/19 ,  H03F1/0266 ,  H03F2200/18 ,  H03F2200/27 ,  H03F2200/411 ,  H03F2200/451 ,  H03F2200/516 ,  H03G1/0017 ,  H03G2201/40

摘要： In a preferred embodiment, the gain expansion in low power mode of a single chain PA is minimized by dynamically adjusting the output impedance of the bias circuit of each gain stage for each mode of operation. Instead of switching in a series attenuator or switching in additional feedback in the first gain stage of a single-chain PA to limit the gain at the increased quiescent current level, this embodiment achieves linear performance by adjusting the quiescent current in each stage to the minimum level that meets the target gain and then increasing the output resistance of the bias circuit of each gain stage in low power mode (LPM) to provide the appropriate level of negative feedback at the base of each amplifying HBT to linearize the gain versus power response.

公开(公告)号：US20170359042A1

公开(公告)日：2017-12-14

申请号：US15177459

申请日：2016-06-09

申请人： KEYSIGHT TECHNOLOGIES, INC.

发明人： David Dascher

IPC分类号： H03G1/00 ,  H03F3/60 ,  H03F3/45 ,  H03F3/55

CPC分类号： H03G1/0088 ,  H03F3/4508 ,  H03F3/45085 ,  H03F3/45475 ,  H03F3/55 ,  H03F3/605 ,  H03F2200/285 ,  H03F2200/291 ,  H03F2203/45288 ,  H03F2203/45612 ,  H03G1/0023 ,  H03G3/001 ,  H03G2201/40

摘要： Distributed amplifier systems and methods are disclosed. An example distributed amplifier system includes first stage traveling wave amplifier (TWA) circuitry that is controllable to provide one of a first set of discrete gain settings. The first stage TWA circuitry includes a first input transmission line, a first output transmission line, and a first plurality of amplifiers coupled antiparallel between the first input transmission line and the first output transmission line. The first set of discrete gain settings has approximately constant logarithmic spacing.

公开(公告)号：US20170163229A1

公开(公告)日：2017-06-08

申请号：US15365092

申请日：2016-11-30

申请人： MURATA MANUFACTURING CO., LTD.

发明人： Yasushi OYAMA ,  Takayuki TSUTSUI ,  Kazuhito NAKAI

IPC分类号： H03G1/00 ,  H03F3/213 ,  H03F1/56

CPC分类号： H03G1/0094 ,  H03F1/56 ,  H03F3/19 ,  H03F3/213 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/165 ,  H03F2200/222 ,  H03F2200/318 ,  H03F2200/387 ,  H03F2203/7209 ,  H03G2201/106 ,  H03G2201/40

摘要： A power amplification module includes a first input terminal that receives a first transmit signal in a first frequency band, a second input terminal that receives a second transmit signal in a second frequency band having a narrower transmit/receive frequency interval than the first frequency band, a first amplification circuit that receives and amplifies the first transmit signal to produce a first amplified signal and outputs the first amplified signal, a second amplification circuit that receives and amplifies the second transmit signal to produce a second amplified signal and outputs the second amplified signal, a third amplification circuit that receives and amplifies the first or second amplified signal to produce an output signal and outputs the output signal, and an attenuation circuit located between the second input terminal and the second amplification circuit and configured to attenuate a receive frequency band component of the second frequency band.

公开(公告)号：US20150280666A1

公开(公告)日：2015-10-01

申请号：US14626491

申请日：2015-02-19

申请人： FUJITSU SEMICONDUCTOR LIMITED

发明人： Tomoyuki ARAI

IPC分类号： H03G1/00 ,  H03F3/45

CPC分类号： H03G1/0029 ,  H03F3/45197 ,  H03F2203/45494 ,  H03F2203/45496 ,  H03F2203/45504 ,  H03F2203/45702 ,  H03G1/0088 ,  H03G3/001 ,  H03G2201/40

摘要： A differential amplification circuit includes: a first transistor and a second transistor of a differential pair; first and second loads; current sources; and a resistor circuit, wherein the resistor circuit includes: a coarse adjustment part and a fine adjustment part, one of the coarse adjustment part and the fine adjustment part includes a first lateral adjustment part and a second lateral adjustment part which have the same configuration, the first lateral adjustment part and the second lateral adjustment part are connected symmetrically to both sides of a central adjustment part, and the central adjustment part has a circuit configuration symmetrical with respect to two connection nodes with the first lateral adjustment part and the second lateral adjustment part.

摘要翻译： 差分放大电路包括：差分对的第一晶体管和第二晶体管; 第一和第二载荷; 当前来源 以及电阻电路，其特征在于，所述电阻电路包括：粗调部和微调部，所述粗调部和微调部之一包括具有相同结构的第一横向调整部和第二横向调整部， 第一横向调节部分和第二横向调节部分对称地连接到中央调节部分的两侧，并且中央调节部分具有相对于具有第一横向调节部分和第二横向调节部的两个连接节点对称的电路构造 部分。