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1. 发明申请

US20180123527A1 METHOD AND APPARATUS FOR DISTORTION REDUCTION IN A CLASS D AMPLIFIER 审中-公开
公开(公告)号：US20180123527A1
公开(公告)日：2018-05-03
申请号：US15339387
申请日：2016-10-31
申请人： RGB Systems, Inc.
发明人： Eric Mendenhall
IPC分类号： H03F1/32 , H03F1/02 , H03F3/217 , H03F1/26 , H03F3/183
CPC分类号： H03F1/32 , H03F1/0205 , H03F1/26 , H03F3/183 , H03F3/217 , H03F2200/225 , H03F2200/459 , H03F2201/3215
摘要： A Class D amplifier is described herein that includes an outer loop, an inner loop, and a notch filter. The notch filter can be located between an output of the outer loop and an input of the inner loop. Alternatively or in addition, the notch filter can be located within the outer loop of the Class D amplifier. Ripple content can initially be present at an input to the inner loop of the Class D amplifier, causing nonlinearity in the inner loop and distortion in the audio output signal. The notch filter can filter the ripple content at the input to the inner loop, thereby reducing the nonlinearity present in the inner loop and the distortion in the audio output signal.

2. 发明授权

US09929702B2 Linearization circuit for a multiple-stage RF power amplifier 有权
公开(公告)号：US09929702B2
公开(公告)日：2018-03-27
申请号：US15265173
申请日：2016-09-14
申请人： Qorvo US, Inc.
发明人： Wenlong Ma , Barry Jia-Fu Lin
IPC分类号： H03F1/32 , H03F3/21 , H03F3/191
CPC分类号： H03F1/3241 , H03F1/3282 , H03F3/191 , H03F3/21 , H03F2200/225 , H03F2200/411 , H03F2200/451 , H03F2200/541 , H03F2200/552 , H03F2200/555 , H03F2201/3209
摘要： A multi-stage Radio Frequency (RF) power amplifier is presented herein. According to one embodiment, the amplifier comprises: a first amplification stage configured to amplify an input signal to provide a first output signal having a phase distortion; a second amplification stage having an input and configured to amplify the first output signal that is received at the input to provide a second output signal, wherein the second output signal has a carrier frequency (FC) modulated by a signal content (S) having a signal content bandwidth (FS); and a resonant circuit comprising an inductor and a capacitor and having a resonant frequency (FR), the resonant circuit coupled to the input of the second amplification stage and compensating for the phase distortion caused by the first amplification stage at frequencies within the signal content bandwidth FS, wherein the resonant frequency FR is less than the signal content bandwidth FS.

3. 发明申请

US20180083579A1 LNA with Programmable Linearity 有权
公开(公告)号：US20180083579A1
公开(公告)日：2018-03-22
申请号：US15272103
申请日：2016-09-21
申请人： Peregrine Semiconductor Corporation
发明人： Hossein Noori , Chih-Chieh Cheng
IPC分类号： H03F1/32 , H03F1/56 , H03F3/195 , H03G3/00 , H03G3/10
CPC分类号： H03F1/3205 , H03F1/56 , H03F3/195 , H03F3/72 , H03F2200/18 , H03F2200/21 , H03F2200/211 , H03F2200/213 , H03F2200/222 , H03F2200/225 , H03F2200/24 , H03F2200/243 , H03F2200/249 , H03F2200/27 , H03F2200/294 , H03F2200/297 , H03F2200/301 , H03F2200/306 , H03F2200/312 , H03F2200/387 , H03F2200/391 , H03F2200/399 , H03F2200/417 , H03F2200/451 , H03F2200/48 , H03F2200/489 , H03F2200/492 , H03F2200/495 , H03F2200/546 , H03F2200/72 , H03F2200/75 , H03G1/0029 , H03G1/0088 , H03G1/0094 , H03G3/001 , H03G3/008 , H03G3/10 , H03G2201/106 , H03G2201/307 , H03G2201/504
摘要： A receiver front end capable of receiving and processing intraband non-contiguous carrier aggregate (CA) signals using multiple low noise amplifiers (LNAs) is disclosed herein. A cascode having a “common source” input stage and a “common gate” output stage can be turned on or off using the gate of the output stage. A first switch is provided that allows a connection to be either established or broken between the source terminal of the input stage of each cascode. Further switches used for switching degeneration inductors, gate/sources caps and gate to ground caps for each legs can be used to further improve the matching performance of the invention.

4. 发明授权

US09887675B2 Power amplifier 有权
公开(公告)号：US09887675B2
公开(公告)日：2018-02-06
申请号：US15283616
申请日：2016-10-03
申请人： Mitsubishi Electric Corporation
发明人： Takao Haruna
IPC分类号： H03F3/191 , H03F1/56 , H03F3/193 , H03F3/21
CPC分类号： H03F1/565 , H03F3/193 , H03F3/195 , H03F3/21 , H03F3/245 , H03F2200/225 , H03F2200/451
摘要： A power amplifier includes: a transistor having a gate electrode, a source electrode and a drain electrode; a passive component part connected to the gate electrode through a gate wiring; and a harmonic circuit connected between the source electrode and the gate wiring and disposed in a region between the gate electrode and the passive component part and between the source electrode and the gate wiring.

5. 发明授权

US09831837B2 Dynamic power divider circuits and methods 有权
公开(公告)号：US09831837B2
公开(公告)日：2017-11-28
申请号：US14533988
申请日：2014-11-05
申请人： QUALCOMM Incorporated
发明人： Joonhoi Hur , Paul Joseph Draxler
IPC分类号： H03F3/60 , H03F1/56 , H03F3/24 , H01Q1/50 , H03F3/68 , H03F1/02 , H03H7/48 , H01P5/16 , H03H11/36
CPC分类号： H03F1/56 , H01P5/16 , H01Q1/50 , H03F1/0288 , H03F3/24 , H03F3/68 , H03F2200/225 , H03F2200/255 , H03H7/48 , H03H11/36
摘要： The present disclosure includes dynamic power divider circuits and methods. In one embodiment, a dynamic power divider includes first and second quarter wave lines that receive an input signal and produce first and second signal on second terminals of the lines. Dynamic power division of the input signal uses a variable impedance circuit between the second terminal of the first quarter wave line and the second terminal of the second quarter wave line. The variable impedance may reduce impedance between two output paths as the input signal power increases or increase impedance between the output paths as the input signal power decreases.

6. 发明申请

US20170214369A1 POWER AMPLIFIER SYSTEM AND ASSOCIATED BIAS CIRCUIT 审中-公开
公开(公告)号：US20170214369A1
公开(公告)日：2017-07-27
申请号：US15361468
申请日：2016-11-27
申请人： MEDIATEK INC.
发明人： Chien-Wei Tseng , Ming-Da Tsai
IPC分类号： H03F1/26 , H03F3/21 , H03F3/193 , H03F3/45
CPC分类号： H03F1/26 , H03F1/0261 , H03F1/301 , H03F3/193 , H03F3/195 , H03F3/21 , H03F3/245 , H03F3/45071 , H03F3/45085 , H03F3/45179 , H03F3/45183 , H03F2200/219 , H03F2200/225 , H03F2203/45144 , H03F2203/45154 , H03F2203/45172 , H03F2203/45542 , H03F2203/45621 , H03F2203/50
摘要： A power amplifier system includes a differential power amplifier and a bias circuit. The differential power amplifier is arranged for receiving a differential input pair to generate an output signal. The bias circuit is arranged for generating a bias voltage to bias the differential power amplifier, and the bias circuit comprises a source follower for receiving a reference voltage to generate the bias voltage.

7. 发明授权

US09571044B1 RF power transistors with impedance matching circuits, and methods of manufacture thereof 有权
标题翻译：具有阻抗匹配电路的RF功率晶体管及其制造方法
公开(公告)号：US09571044B1
公开(公告)日：2017-02-14
申请号：US14919513
申请日：2015-10-21
申请人： FREESCALE SEMICONDUCTOR, INC.
发明人： Ning Zhu , Damon G. Holmes , Jeffrey K. Jones
IPC分类号： H03F3/04 , H03F1/42 , H03F3/193 , H03F1/56
CPC分类号： H03F1/565 , H01L23/66 , H01L2223/6655 , H01L2224/48091 , H01L2224/4813 , H01L2224/48137 , H01L2224/49175 , H03F3/195 , H03F2200/108 , H03F2200/181 , H03F2200/216 , H03F2200/222 , H03F2200/225 , H03F2200/297 , H03F2200/301 , H03F2200/309 , H03F2200/387 , H03F2200/391 , H03F2200/402 , H03F2200/451 , H03F2200/552 , H03F2200/75 , H01L2924/00014
摘要： Embodiments of an RF amplifier include a transistor with a control terminal and first and second current carrying terminals, and a shunt circuit coupled between the first current carrying terminal and a ground reference node. The shunt circuit includes a first shunt inductance, a second shunt inductance, and a shunt capacitor coupled in series. The second shunt inductance and the shunt capacitor form a series resonant circuit in proximity to a center operating frequency of the amplifier, and an RF cold point node is present between the first and second shunt inductances. The RF amplifier also includes a video bandwidth circuit coupled between the RF cold point node and the ground reference node.
摘要翻译： RF放大器的实施例包括具有控制端子和第一和第二载流端子的晶体管，以及耦合在第一载流端子和接地参考节点之间的分流电路。分路电路包括第一并联电感，第二并联电感和串联耦合的并联电容器。第二并联电感和并联电容器在放大器的中心工作频率附近形成串联谐振电路，并且RF冷点节点存在于第一和第二分流电感之间。 RF放大器还包括耦合在RF冷点节点和接地参考节点之间的视频带宽电路。

8. 发明授权

US09473101B2 Amplifier with integral notch filter 有权
标题翻译：带积分陷波滤波器的放大器
公开(公告)号：US09473101B2
公开(公告)日：2016-10-18
申请号：US14617579
申请日：2015-02-09
申请人： QUALCOMM Incorporated
发明人： Alan Ngar Loong Chan , Saihua Lin
IPC分类号： H03F3/191 , H03G3/30 , H04B1/10 , H03F1/56 , H03F3/193
CPC分类号： H03G3/3042 , H03F1/3205 , H03F1/565 , H03F3/191 , H03F3/193 , H03F2200/165 , H03F2200/213 , H03F2200/216 , H03F2200/225 , H03F2200/267 , H03F2200/294 , H03F2200/451 , H03F2200/492 , H04B1/1036
摘要： An amplifier is disclosed that may include a filter, such as a notch-filter, to filter an output signal provided by the amplifier. The included filter may suppress and/or reduce a gain of the amplifier for a particular range of frequencies. In one embodiment, a frequency response of the filter may be determined by one or more reactive components included within the amplifier. In at least one embodiment, the amplifier may include two or more mutual inductors to reduce the gain of the amplifier when operated at or near a predetermined frequency. In another embodiment, the amplifier may include one or more variable capacitors that may enable the frequency response of the filter to be changed and/or modified.
摘要翻译：公开了一种放大器，其可以包括滤波器，例如陷波滤波器，以对放大器提供的输出信号进行滤波。所包括的滤波器可以在特定频率范围内抑制和/或降低放大器的增益。在一个实施例中，滤波器的频率响应可以由包括在放大器内的一个或多个无功分量来确定。在至少一个实施例中，放大器可以包括两个或更多个互感器，以在预定频率处或接近预定频率下操作时减小放大器的增益。在另一个实施例中，放大器可以包括一个或多个可变电容器，其可使得能够改变和/或修改滤波器的频率响应。

9. 发明申请

US20160112146A1 CIRCUIT PROVIDING HARMONIC RESPONSE REJECTION FOR A FREQUENCY MIXER 有权
标题翻译：为频率混合器提供谐波响应电路的电路
公开(公告)号：US20160112146A1
公开(公告)日：2016-04-21
申请号：US14516546
申请日：2014-10-16
申请人： QUALCOMM Incorporated
发明人： Wing Fat Andy LAU , Jorge Andres GARCIA , David Zixiang YANG , Ahmed Abdel Monem YOUSSEF
IPC分类号： H04B15/06
CPC分类号： H04B15/06 , H03D7/1458 , H03D7/1483 , H03F2200/165 , H03F2200/222 , H03F2200/225 , H03F2200/451 , H03F2200/534 , H03F2200/541 , H04B2215/064
摘要： An apparatus for reducing a harmonic response in an electronic circuit is provided. The apparatus includes an RF input configured to provide a first signal operating at a radio frequency. The apparatus includes a local oscillator configured to produce a second signal operating at a local oscillator (LO) frequency. The apparatus includes a switching mixer configured to mix the first and second signals. The apparatus includes a notch filter comprising an inductor and a capacitor connected in parallel. The notch filter is directly coupled to an input of the switching mixer in series. The notch filter is tuned such that its resonant frequency is a harmonic of the LO frequency signal. In an aspect, the apparatus also includes a transformer configured to provide the first signal. In an aspect the apparatus also includes a second notch filter comprising a second inductor and a second capacitor connected in parallel.
摘要翻译：提供一种用于减少电子电路中的谐波响应的装置。该装置包括被配置为提供以射频工作的第一信号的RF输入。该装置包括配置成产生以本地振荡器（LO）频率工作的第二信号的本地振荡器。该装置包括配置成混合第一和第二信号的切换混合器。该装置包括陷波滤波器，该陷波滤波器包括并联连接的电感器和电容器。陷波滤波器与串联的开关混频器的输入端直接耦合。调谐陷波滤波器使其谐振频率为LO频率信号的谐波。在一方面，该装置还包括被配置为提供第一信号的变压器。在一方面，该装置还包括第二陷波滤波器，其包括并联连接的第二电感器和第二电容器。

10. 发明授权

US09203348B2 Adjustable power splitters and corresponding methods and apparatus 有权
标题翻译：可调功率分配器及相应的方法和装置
公开(公告)号：US09203348B2
公开(公告)日：2015-12-01
申请号：US14086520
申请日：2013-11-21
申请人： FREESCALE SEMICONDUCTOR, INC.
发明人： Abdulrhman M. S. Ahmed , Joseph Staudinger , Paul R. Hart
IPC分类号： G06G7/12 , H03F1/02 , H03F3/68 , H03F3/189 , H03F3/20 , H03F3/21 , H03F3/60
CPC分类号： H03F1/0288 , H03F1/3241 , H03F3/189 , H03F3/195 , H03F3/20 , H03F3/211 , H03F3/245 , H03F3/602 , H03F3/68 , H03F2200/225
摘要： An adjustable power splitter includes: a power divider with an input and a plurality, N, of divider outputs; a plurality, N, of adjustable phase shifters and a plurality, N, of adjustable attenuators series coupled to the divider outputs and providing a plurality, N, of power outputs; an interface; and a controller. The controller is configured to receive, via the interface, data indicating phase shifts to be applied by the adjustable phase shifters and attenuation levels to be applied by the adjustable attenuators, and to control, based on the data, the phase shifts and attenuation levels applied by the adjustable phase shifters and the adjustable attenuators.
摘要翻译：可调功率分配器包括：具有输入和多个N个分频器输出的功率分配器; 多个N个可调移相器和多个N个可调衰减器，串联耦合到除法器输出并提供多个N个功率输出; 界面; 和控制器。控制器被配置为经由接口接收指示由可调移相器施加的相移的数据和由可调衰减器施加的衰减电平，并且基于该数据控制施加的相移和衰减电平通过可调移相器和可调衰减器。

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