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公开(公告)号：US20160294330A1
公开(公告)日：2016-10-06
申请号：US15184910
申请日：2016-06-16
Applicant: Freescale Semiconductor, Inc.
Inventor： ABDULRHMAN M.S. AHMED , MARIO M. BOKATIUS , PAUL R. HART , JOSEPH STAUDINGER , RICHARD E. SWEENEY
CPC classification number: H03F1/0288 , G06F13/4282 , G06G7/10 , H03F3/189 , H03F3/19 , H03F3/211 , H03F3/602 , H03F3/68 , H03F2200/387 , H03F2200/438 , H03F2200/451 , H03F2203/21106 , H03F2203/21193 , H03G1/0088 , H03G2201/106 , H04L7/0079 , H04L27/22
Abstract: Embodiments of circuits for use with an amplifier that includes multiple amplifier paths include a first circuit and a second circuit in parallel with the first circuit. The first circuit includes a first input coupled to a first power divider output, a first output coupled to a first amplifier path of the multiple amplifier paths, and a first adjustable phase shifter and a first attenuator series coupled between the first input and the first output. The second circuit includes a second input coupled to a second power divider output, a second output coupled to a second amplifier path of the multiple amplifier paths, and a second adjustable phase shifter coupled between the second input and the second output.
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52.发明授权公开(公告)号：US07339426B2
公开(公告)日：2008-03-04
申请号：US11081384
申请日：2005-03-16
Applicant: Mark Gurvich , Ahmad Khanifar , Nikolai Maslennikov , Alexander Rabinovich
Inventor： Mark Gurvich , Ahmad Khanifar , Nikolai Maslennikov , Alexander Rabinovich
IPC: H03G3/30
CPC classification number: H03F1/32 , H03F1/0211 , H03F1/0222 , H03F1/0244 , H03G3/3042 , H03G2201/106 , H03G2201/206 , H03G2201/307
Abstract: A high efficiency radio frequency (RF) power amplifier having dynamically controlled back off is disclosed. The RF input voltage is sampled by an adaptive analog signal processing circuit. The adaptive analog signal processing circuit controls the supply voltage to RF amplifier devices, such as LDMOS devices, which varies the efficiency or back off of the power amplifier. The variable supply voltage in turn varies peak power of the amplifier.
Abstract translation: 公开了具有动态控制的退避的高效率射频（RF）功率放大器。 RF输入电压由自适应模拟信号处理电路采样。 自适应模拟信号处理电路控制对诸如LDMOS器件的RF放大器器件的电源电压，这些器件改变功率放大器的效率或退避。 可变电源电压又会改变放大器的峰值功率。
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公开(公告)号：US12113489B2
公开(公告)日：2024-10-08
申请号：US18350720
申请日：2023-07-11
Applicant: Biamp Systems, LLC
Inventor： Aaron Faulstich
CPC classification number: H03F1/3264 , G10L25/21 , H03G3/3005 , H03G11/008 , H04R3/007 , H04R3/02 , H04R3/04 , H03G2201/106
Abstract: Example embodiments provide a process that includes one or more of receiving an audio signal at a feedback compressor circuit, multiplying the received audio signal with a power feedback signal to create a product audio signal, wherein the feedback signal comprises a low-pass filtered signal, applying a power amplifier to the product audio signal, and providing the amplified product audio signal as an output signal to a speaker.
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公开(公告)号：US20230353101A1
公开(公告)日：2023-11-02
申请号：US18350720
申请日：2023-07-11
Applicant: Biamp Systems, LLC
Inventor： Aaron Faulstich
CPC classification number: H03F1/3264 , H04R3/007 , H03G3/3005 , H04R3/02 , H04R3/04 , G10L25/21 , H03G11/008 , H03G2201/106
Abstract: Example embodiments provide a process that includes one or more of receiving an audio signal at a feedback compressor circuit, multiplying the received audio signal with a power feedback signal to create a product audio signal, wherein the feedback signal comprises a low-pass filtered signal, applying a power amplifier to the product audio signal, and providing the amplified product audio signal as an output signal to a speaker.
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公开(公告)号：US11658731B2
公开(公告)日：2023-05-23
申请号：US17175489
申请日：2021-02-12
Applicant: Metawave Corporation
Inventor： Jun Fang
CPC classification number: H04B7/15535 , H01Q3/36 , H01Q21/22 , H03F3/211 , H03F3/213 , H03F3/68 , H03G3/3042 , H04B7/15507 , H03F2200/294 , H03F2200/451 , H03G2201/106 , H03G2201/206
Abstract: Examples disclosed herein relate to a high gain active relay antenna system. The active relay antenna system comprises a first antenna pair having a first receive antenna and a first transmit antenna to communicate wireless signals in a forward link from a base station to a plurality of users; and a second antenna pair having a second receive antenna and a second transmit antenna to communicate wireless signals in a return link from the plurality of users to the base station. The active relay antenna system further comprises a first active relay section and a second active relay section to provide for adjustable power gain in the wireless signals.
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Patent Agency Ranking
公开(公告)号：US20190190455A1
公开(公告)日：2019-06-20
申请号：US16223300
申请日：2018-12-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Masao KONDO , Satoshi TANAKA , Yasuhisa YAMAMOTO , Takayuki TSUTSUI , Isao OBU
CPC classification number: H03F1/0211 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2200/222 , H03F2200/387 , H03F2200/451 , H03F2203/21103 , H03F2203/21139 , H03G3/3042 , H03G2201/106
Abstract: A transmission unit includes a first transistor that amplifies power of a first signal and outputs a second signal, a power supply circuit that supplies to the first transistor a power supply voltage that changes in accordance with an amplitude level of the first signal, and an attenuator that attenuates the first signal in such a manner that an amount of attenuation of the first signal increases with a decrease in the power supply voltage when the power supply voltage is less than a first level.
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57.发明授权公开(公告)号：US10079578B2
公开(公告)日：2018-09-18
申请号：US15642484
申请日：2017-07-06
Applicant: Texas Instruments Incorporated
Inventor： Shun Qian , Kim Nordtorp Madsen , Lucia Wan
CPC classification number: H03F1/32 , H03F1/26 , H03F1/3211 , H03F3/181 , H03F3/217 , H03F3/2171 , H03F3/2173 , H03F2200/03 , H03F2200/211 , H03F2200/471 , H03F2200/66 , H03G3/20 , H03G7/002 , H03G7/04 , H03G2201/106
Abstract: The disclosed embodiments include an audio amplifier system configured to provide a total harmonic distortion (THD) controlled clip detector and an automatic gain limiter (AGL) solution for a closed-loop amplifier. The audio amplifier system is capable of maintaining high power output without hard distortion (i.e., hard clipping) for providing better acoustics, while preventing damage to the system.
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公开(公告)号：US10056874B1
公开(公告)日：2018-08-21
申请号：US15445811
申请日：2017-02-28
Applicant: pSemi Corporation
Inventor： Tero Tapio Ranta , Keith Bargroff , Christopher Murphy , Robert Mark Englekirk
CPC classification number: H03G3/3042 , H03F1/30 , H03F1/303 , H03F1/304 , H03F1/56 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/447 , H03F2200/451 , H03F2200/468 , H03G3/3036 , H03G2201/106
Abstract: Temperature compensation circuits and methods for adjusting one or more circuit parameters of a power amplifier (PA) to maintain approximately constant Gain versus time during pulsed operation sufficient to substantially offset self-heating of the PA. Some embodiments compensate for PA Gain “droop” due to self-heating using a Sample and Hold (S&H) circuit. The S&H circuit samples and holds an initial temperature of the PA at commencement of a pulse. Thereafter, the S&H circuit generates a continuous measurement that corresponds to the temperature of the PA during the remainder of the pulse. A Gain Control signal is generated that is a function of the difference between the initial temperature and the operating temperature of the PA as the PA self-heats for the duration of the pulse. The Gain Control signal is applied to one or more adjustable or tunable circuits within a PA to offset the Gain droop of the PA.
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公开(公告)号：US20180131350A1
公开(公告)日：2018-05-10
申请号：US15789624
申请日：2017-10-20
Applicant: FUJITSU LIMITED
Inventor： Toshihiro SHIMURA
CPC classification number: H03H11/16 , H03F3/45475 , H03F2200/06 , H03F2200/09 , H03F2203/45171 , H03F2203/45621 , H03F2203/45731 , H03G1/0088 , H03G3/30 , H03G2201/106
Abstract: There is provided a phase-switch-equipped variable amplification device including a switch including one input port and two output ports and configured to output a single-ended signal input to the one input port into one of the two output ports, a first converter coupled to the two output ports of the switch and configured to convert the single-ended signal output from the switch into a pair of differential signals having phases different from each other by 180-degree and invert phases of the pair of differential signals in response to a switching operation at the switch, a variable amplifier configured to amplify the pair of differential signals in accordance with a control voltage, and a second converter configured to convert the pair of differential signals amplified by the variable amplifier into a single-ended signal.
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公开(公告)号：US20180131339A1
公开(公告)日：2018-05-10
申请号：US15808486
申请日：2017-11-09
Applicant: SKYWORKS SOLUTIONS, INC.
Inventor： Peihua Ye , Patrick Marcus Naraine , Adrian John Bergsma , Peter Harris Robert Popplewell , Thomas Obkircher
CPC classification number: H03G1/0088 , H03F1/3211 , H03F3/195 , H03F3/45179 , H03F3/45188 , H03F3/72 , H03F2200/294 , H03F2200/451 , H03F2203/45338 , H03F2203/45731 , H03F2203/7233 , H03F2203/7236 , H03F2203/7239 , H03G2201/103 , H03G2201/106 , H03G2201/504
Abstract: Aspects and examples described herein provide a variable gain amplifier circuit and assembly. In one example, a variable gain amplifier circuit includes a signal input, a signal output, and a variable gain amplifier including a plurality of unit cell groups coupled between the signal input and the signal output, the variable gain amplifier configured to provide an adjustable gain to a signal received at the signal input during each of a plurality of amplify modes of the variable gain amplifier, each of the plurality of amplify modes corresponding to at least one unit cell group of the plurality of unit cell groups. A bypass path including a fixed attenuator is coupled in parallel with the variable gain amplifier between the signal input and the signal output to selectively couple the signal input to the signal output through the fixed attenuator during a bypass mode.
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