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1. 发明授权

US10498295B2 Feedback in MISO systems 有权
公开(公告)号：US10498295B2
公开(公告)日：2019-12-03
申请号：US16311742
申请日：2017-06-19
申请人： Nokia Solutions and Networks Oy
发明人： Charles Nader , Bjoern Jelonnek
IPC分类号： H04K1/02 , H03F1/32 , H03F3/189 , H03F3/21
CPC分类号： H03F1/3247 , H03F1/3252 , H03F1/3258 , H03F1/3276 , H03F3/189 , H03F3/211
摘要： It is provided a method for providing feedback to pre-distorters in branches of a MISO system such that the pre-distortion cancels distortions caused by the signal path and the combiner combining the signals from the branches into which input signals are input. The method includes generating uncorrelated noises and mixing them with the input signals, evaluating the output of the combiner based on the input signals and the noises in order to determine a respective contribution of each input signal to the output of the combiner, and accordingly determining an appropriate pre-distortion. The signal path may apply a non-linear and/or dynamic function on the signal.

2. 发明授权

US09799645B2 Field effect transistor (FET) structure with integrated gate connected diodes 有权
公开(公告)号：US09799645B2
公开(公告)日：2017-10-24
申请号：US14947197
申请日：2015-11-20
申请人： Raytheon Company
发明人： John P. Bettencourt , Raghuveer Mallavarpu
IPC分类号： H01L29/66 , H01L27/06 , H01L29/872 , H01L21/8232 , H01L29/812 , H01L29/06
CPC分类号： H01L27/0629 , H01L21/8232 , H01L21/823437 , H01L21/823475 , H01L21/8252 , H01L29/0696 , H01L29/0891 , H01L29/1095 , H01L29/2003 , H01L29/47 , H01L29/7787 , H01L29/812 , H01L29/872 , H03F1/3205 , H03F1/3276 , H03F1/56 , H03F3/195 , H03F3/213 , H03F2200/126 , H03F2200/222 , H03F2200/387 , H03F2200/451 , H03F2200/75
摘要： A structure having: a plurality of field effect transistors (FETs) connected between a common input and a common output, each one of the field effect transistors comprises: a source region, a drain region, and a gate electrode for controlling carriers through a channel region of a transistor region of the structure between the source region and the drain region; a plurality of diodes, each one of the diodes being associated with a corresponding one of the plurality of FETs, each one of the diodes having an electrode in Schottky contact with a diode region of the corresponding one of the FETs. The gate electrode and the diode electrode extend along parallel lines. The source region, the drain region, the channel region, and a diode region having therein the diode are disposed along a common line.

3. 发明授权

US09755577B2 Predistortion in radio frequency transmitter 有权
公开(公告)号：US09755577B2
公开(公告)日：2017-09-05
申请号：US14974615
申请日：2015-12-18
申请人： Skyworks Solutions, Inc.
发明人： Hamid R. Amir Firouzkouhi , Bipul Agarwal , Hasan Akyol
IPC分类号： H04B1/04 , H03F1/02 , H03G3/30 , H03F1/32 , H03F3/193 , H03F3/24 , H03F3/21
CPC分类号： H03F1/0205 , H03F1/3205 , H03F1/3241 , H03F1/3276 , H03F3/193 , H03F3/21 , H03F3/245 , H03F2200/18 , H03F2200/405 , H03F2200/451 , H03F2200/555 , H03F2201/3215 , H03G3/3042 , H04B1/0475 , H04B2001/0425
摘要： A power amplifier circuit includes an amplifier MOSFET and a predistorter MOSFET. The predistorter MOSFET source and drain are connected together, and the predistorter MOSFET is connected between the gate of the amplifier MOSFET and a second bias voltage signal. This biasing of the predistorter MOSFET causes it to provide a nonlinear capacitance at the gate of the amplifier MOSFET. The combined non-linear capacitances of the amplifier MOSFET and predistorter MOSFET provide predistortion that promotes cancellation of the distortion or nonlinearity contributed by the amplifier MOSFET alone.

4. 发明申请

US20170207758A1 POWER AMPLIFIER SYSTEM AND ASSOCIATED CONTROL CIRCUIT AND CONTROL METHOD 审中-公开
公开(公告)号：US20170207758A1
公开(公告)日：2017-07-20
申请号：US15348956
申请日：2016-11-10
申请人： MEDIATEK INC.
发明人： Chien-Wei Tseng , Ming-Da Tsai
IPC分类号： H03F3/21 , H03F1/32
CPC分类号： H03F3/21 , H03F1/0266 , H03F1/14 , H03F1/3205 , H03F1/3276 , H03F3/193 , H03F2200/213 , H03F2200/222 , H03F2200/228 , H03F2200/435 , H03F2200/451 , H03F2200/465 , H03F2200/471 , H03F2200/546 , H03F2200/555 , H03F2200/75 , H03F2200/78 , H03F2201/3215
摘要： A control circuit of a power amplifier includes a peak detector, a first comparator, a first current source, a second comparator, a second current source and a bias circuit. The peak detector is arranged for detecting an amplitude of an input signal. The first comparator is arranged for comparing the amplitude of the input signal with a first threshold to generate a first comparing result. The first current source is arranged for generating a first current according to the first comparing result The second comparator is arranged for comparing the amplitude of the input signal with a second threshold to generate a second comparing result. The second current source is arranged for generating a second current according to the second comparing result. The bias circuit is arranged for generating a bias voltage according to the first current and the second current to the power amplifier.

5. 发明授权

US09660595B2 Linear amplifier using nonlinear amplifying stage 有权
公开(公告)号：US09660595B2
公开(公告)日：2017-05-23
申请号：US14972105
申请日：2015-12-17
申请人： SOONGSIL UNIVERSITY RESEARCH CONSORTIUM TECHNO-PARK
发明人： Chang Kun Park , Jong Hoon Park
IPC分类号： H03G3/20 , H03F1/56 , H03F3/193 , H03F1/02 , H03F1/32 , H03G3/30
CPC分类号： H03F1/56 , H03F1/0261 , H03F1/3276 , H03F3/193 , H03F2200/18 , H03F2200/411 , H03F2200/451 , H03G3/3042
摘要： Disclosed herein is a linear amplifier using a nonlinear amplifying stage which includes a first amplifier and a second amplifier connected in cascade, including: a bias voltage generator in which a first bias voltage is applied to a gate terminal of the first amplifier, and a second bias voltage higher than the first bias voltage is applied to a gate terminal of the second amplifier, wherein the first amplifier and the second amplifier have a nonlinear gain characteristic in a region of arbitrary output power, and as the output power increases in the region of arbitrary output power, a gain of the first amplifier increases, while a gain of the second amplifier decreases.

6. 发明授权

US09614482B2 Amplifier 有权
公开(公告)号：US09614482B2
公开(公告)日：2017-04-04
申请号：US14481042
申请日：2014-09-09
申请人： FUJITSU LIMITED , FUJITSU SEMICONDUCTOR LIMITED
发明人： Yoichi Kawano , Shinji Yamaura
IPC分类号： H03F1/26 , H03F1/32 , H03F1/02 , H03F1/56 , H03F3/24 , H03F3/45
CPC分类号： H03F1/32 , H03F1/0266 , H03F1/26 , H03F1/3205 , H03F1/3211 , H03F1/3276 , H03F1/565 , H03F3/245 , H03F3/45179 , H03F2200/165 , H03F2200/216 , H03F2200/246 , H03F2200/387 , H03F2201/3215 , H03F2203/45541 , H03F2203/45552 , H03F2203/45554 , H03F2203/45568 , H03F2203/45576
摘要： An amplifier includes two input terminals to receive a differential, two-tone transmission signal; two output terminals; a coil having terminals connected with the input terminals respectively, and a center tap; a first transistor having the gate connected with one terminal of the coil, and the output terminal connected with one output terminal; a second transistor having the gate connected with the other terminal of the coil, and the output terminal connected with the other output terminal; a diode having a terminal connected with the center tap; and a bias circuit connected with the other terminal of the diode to output a gate voltage to turn on the first and second transistors. The diode adjusts the terminal voltage depending on a signal level of a double harmonic wave of the transmission signal supplied to the terminal of the diode from the center tap.

7. 发明授权

US09461596B1 Doherty power amplifier with integrated pre-distortion 有权
标题翻译： Doherty功率放大器具有集成的预失真
公开(公告)号：US09461596B1
公开(公告)日：2016-10-04
申请号：US14292241
申请日：2014-05-30
申请人： ANADIGICS, iNC.
发明人： Kenneth Sean Ozard
IPC分类号： H03F3/68 , H03F1/32 , H03G1/00
CPC分类号： H03F1/3247 , H03F1/0288 , H03F1/3276 , H03F1/3282 , H03F3/68 , H03F2200/405 , H03F2200/435 , H03F2201/3231 , H03G1/0017
摘要： The present invention implements a series of analog gain and phase correction circuits in each leg of the N-way Doherty to significantly reduce amplitude modulation to amplitude modulation (AM-AM) and amplitude modulation to phase modulation (AM-PM), distortion. The correction blocks comprise gain and phase corrections and optionally an additional gain block. The phase corrections include at least a phase offset and may include an optional non-linear element such as a diode pre-distorter. The pre-distortion circuitry is intended to reduce the necessary complexity of the DPD and reduce the DPD cost and power consumption. The gain and phase corrections can be calculated from computational optimization to minimize the AM-AM and AM-PM distortion. The gain and phase corrections can also be calculated from the AM-AM and AM-PM data which can be output from common DPD systems and laboratory characterization equipment.
摘要翻译：本发明在N路Doherty的每个支路中实现了一系列模拟增益和相位校正电路，以显着降低幅度调制到幅度调制（AM-AM）和幅度调制到相位调制（AM-PM）的失真。校正块包括增益和相位校正以及可选的附加增益块。相位校正包括至少相位偏移，并且可以包括可选的非线性元件，例如二极管预失真器。预失真电路旨在减少DPD的必要复杂性，并降低DPD成本和功耗。可以从计算优化计算增益和相位校正，以最小化AM-AM和AM-PM失真。增益和相位校正也可以从AM-AM和AM-PM数据计算出来，这些数据可以从普通DPD系统和实验室表征设备输出。

8. 发明申请

US20160240181A1 AUDIO SYSTEM AND METHOD FOR REDUCTION AND/OR ELIMINATION OF DISTORTION 审中-公开
标题翻译：用于减少和/或消除失真的音频系统和方法
公开(公告)号：US20160240181A1
公开(公告)日：2016-08-18
申请号：US14748748
申请日：2015-06-24
申请人： Dennis McNutt
发明人： Dennis McNutt
IPC分类号： G10K11/00
CPC分类号： G10K11/002 , H03F1/3276 , H03F3/183 , H03F2200/03 , H03G3/20 , H03G5/165 , H04S7/301 , H04S2400/09
摘要： An audio system for reduction and/or elimination of distortion provides a microphone or instrument sound pick up for the various musical instruments and singers within the performance venue. The sound provided by the microphone or audio pick up is coupled to an amplifier, the output of which is coupled to a speaker system. In accordance with the present invention, a microphone is positioned within the output range of the speaker system and is coupled to one input of a comparator circuit. The remaining input of the comparator circuit is coupled to the microphones or pick ups of the musical instruments and singers. An additive device receives the output signal of the comparator and the originating signal from the microphones or pick ups to form a correcting audio signal which is applied to the amplifier. In an alternate embodiment of the present invention, an adaptive preamplifier is interposed between the originating microphones and audio pick ups and the amplifier. The adaptive preamplifier receives the output of the comparator and imposes alteration upon the signal processed through the preamplifier for application to the amplifier. In a still further alternate embodiment of the present invention, an adaptive amplifier includes a plurality of control elements which are capable of altering the transmission characteristic of the amplifier for the applied signals. The adaptive controls are coupled to and controlled by the comparator.
摘要翻译：用于减少和/或消除失真的音频系统为表演场地内的各种乐器和歌手提供麦克风或乐器声音拾取。由麦克风或音频拾取提供的声音耦合到放大器，其放大器耦合到扬声器系统。根据本发明，麦克风位于扬声器系统的输出范围内并耦合到比较器电路的一个输入端。比较器电路的剩余输入耦合到乐器和歌手的麦克风或拾音器。加法装置从麦克风或拾音器接收比较器的输出信号和起始信号，以形成施加到放大器的校正音频信号。在本发明的替代实施例中，自适应前置放大器插在始发麦克风和音频拾取器和放大器之间。自适应前置放大器接收比较器的输出，并对通过前置放大器处理的信号进行改变，以应用于放大器。在本发明的又一替代实施例中，自适应放大器包括能够改变放大器对所施加的信号的传输特性的多个控制元件。自适应控制耦合到比较器并由其控制。

9. 发明申请

US20160056881A1 MULTI-STAGE LINEARIZER 审中-公开
标题翻译：多级线性化器
公开(公告)号：US20160056881A1
公开(公告)日：2016-02-25
申请号：US14832982
申请日：2015-08-21
申请人： Lockheed Martin Corporation
发明人： Marc Ronald BJORKMAN , Kim Thomas LANCASTER , Douglas V. MCKINNON , Novellone ROZARIO , Jason Michael TEIXEIRA
IPC分类号： H04B7/185 , H03F3/19 , H03F3/21 , H03F1/02
CPC分类号： H04B7/1851 , H03F1/3241 , H03F1/3276 , H03F3/195 , H03F3/245 , H03F2200/405 , H03F2200/451 , H04B1/0475 , H04B2001/0425
摘要： A high-linearity linearizer system includes a multi-stage linearizer circuit formed by cascading multiple linearizer circuits. The multi-stage linearizer circuit is configured to pre-distort an input signal to generate a pre-distorted signal. A non-linear high-power amplifier (HPA) having non-linear characteristics is coupled to the multi-stage linearizer circuit and is configured to amplify the pre-distorted signal. Pre-distortion characteristics of the multi-stage linearizer circuit are configured to counter the non-linear characteristics of the non-linear HPA and to compensate a non-linearity of the non-linear HPA to achieve a desired level of linearity.
摘要翻译：高线性线性化系统包括通过级联多个线性化电路而形成的多级线性化电路。多级线性化电路被配置为对输入信号进行预失真以产生预失真信号。具有非线性特性的非线性大功率放大器（HPA）耦合到多级线性化电路，并被配置为放大预失真信号。多级线性化电路的预失真特性被配置为对抗非线性HPA的非线性特性并且补偿非线性HPA的非线性以实现期望的线性水平。

10. 发明申请

US20130278332A1 DOHERTY AMPLIFYING APPARATUS AND METHOD 审中-公开
标题翻译： DOHERTY放大装置和方法
公开(公告)号：US20130278332A1
公开(公告)日：2013-10-24
申请号：US13793164
申请日：2013-03-11
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
发明人： Hong Gu JI , In Bok YOM
IPC分类号： H03F1/32
CPC分类号： H03F1/3241 , H03F1/0288 , H03F1/3276
摘要： Disclosed is a Doherty amplifying apparatus and method that ensures efficiency in linearity of an input signal by linearizing an applied signal using a linearization unit by analog pre-distortion, and amplifying the linearized signal using a primary amplifier and a secondary amplifier.
摘要翻译：公开了通过使用线性化单元通过模拟预失真线性化施加的信号并且使用主放大器和次级放大器来放大线性化信号来确保输入信号的线性度的效率的Doherty放大装置和方法。

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