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公开(公告)号：US20240022212A1
公开(公告)日：2024-01-18
申请号：US18251312
申请日：2021-09-10
申请人： Qorvo US, Inc.
发明人： Nadim Khlat
CPC分类号： H03F1/0222 , H03F3/245 , H03F3/195 , H03F3/72 , H03F2200/102 , H03F2200/451 , H03F2203/7221
摘要： An equalizer circuit in an envelope tracking (ET) integrated circuit (ETIC) is disclosed. The ETIC (26) is configured to generate an ET voltage based on a target voltage (VTGT) for amplifying a radio frequency (RF) signal(s). Since the ETIC has inherent impedance and group delay that can cause distortion in the ET voltage, an equalizer circuit (24) is provided in the ETIC to equalize the target voltage prior to generating the ET voltage. Specifically, the equalizer circuit generates an equalized target voltage to offset the inherent impedance and a modified target voltage to mitigate the group delay. Accordingly, the equalizer circuit can output a processed target voltage, which can include the equalized target voltage and/or the modified target voltage, for generating the ET voltage. As a result, it is possible to reduce distortion resulted from the inherent impedance and group delay, especially when the RF signal(s) is modulated in a wide modulation bandwidth.
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公开(公告)号：US11689164B2
公开(公告)日：2023-06-27
申请号：US17933231
申请日：2022-09-19
发明人： Syunji Yoshimi
IPC分类号： H03F3/68 , H03F3/21 , H03F1/02 , H03F3/19 , H03F3/195 , H03F3/24 , H03F3/72 , H04B1/04 , H04B1/16
CPC分类号： H03F3/211 , H03F1/0211 , H03F3/19 , H03F3/195 , H03F3/245 , H03F3/68 , H03F3/72 , H04B1/04 , H04B1/0483 , H03F2200/111 , H03F2200/171 , H03F2200/231 , H03F2200/294 , H03F2200/387 , H03F2200/39 , H03F2200/414 , H03F2200/429 , H03F2200/451 , H03F2203/21109 , H03F2203/21139 , H03F2203/21157 , H03F2203/21175 , H03F2203/7209 , H03F2203/7215 , H03F2203/7221 , H03F2203/7236 , H04B1/16 , H04B2001/0408
摘要： A multi-band power amplifier module includes at least one transmission input terminal, at least one power amplifier circuit that receives a first transmission signal and a second transmission signal through the at least one transmission input terminal, a first filter circuit that allows the first transmission signal to pass therethrough, a second filter circuit that allows the second transmission signal to pass therethrough, at least one transmission output terminal through which the first and second transmission signals output from the first and second filter circuits are output, a transmission output switch that outputs each of the first and second transmission signals output from the at least one power amplifier circuit to the first filter circuit or the second filter circuit, and a first tuning circuit that adjusts impedance matching between the at least one power amplifier circuit and the at least one transmission output terminal.
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公开(公告)号：US20180331659A1
公开(公告)日：2018-11-15
申请号：US15969075
申请日：2018-05-02
CPC分类号： H03F1/0255 , H03F1/0227 , H03F1/0233 , H03F1/0266 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/102 , H03F2200/207 , H03F2200/336 , H03F2200/36 , H03F2200/387 , H03F2200/411 , H03F2200/417 , H03F2200/432 , H03F2200/451 , H03F2200/471 , H03F2203/7215 , H03F2203/7221 , H03G3/3042 , H03G2201/307 , H04B1/0475 , H04B2001/0408
摘要： Envelope trackers providing compensation for power amplifier output load variation are provided herein. In certain configurations, a radio frequency (RF) system includes a power amplifier that amplifies an RF signal, an output detector coupled to an output of the power amplifier and that generates an output detection signal, an input detector coupled to an input of the power amplifier and that generates an input detection signal, and an envelope tracker that generates a power amplifier supply voltage for the power amplifier based on an envelope of the RF signal. The envelope tracker compensates the power amplifier for output load variation based on the output detection signal and the input detection signal.
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公开(公告)号：US20180302036A1
公开(公告)日：2018-10-18
申请号：US15922641
申请日：2018-03-15
发明人： Florinel G. Balteanu , Sabah Khesbak , Yevgeniy A. Tkachenko , David Steven Ripley , Robert John Thompson
CPC分类号： H03F1/0205 , H03F1/02 , H03F1/0211 , H03F1/0227 , H03F1/0244 , H03F1/302 , H03F1/56 , H03F3/19 , H03F3/21 , H03F3/211 , H03F3/24 , H03F3/245 , H03F3/72 , H03F2200/102 , H03F2200/108 , H03F2200/111 , H03F2200/294 , H03F2200/336 , H03F2200/387 , H03F2200/414 , H03F2200/417 , H03F2200/451 , H03F2200/504 , H03F2200/555 , H03F2203/21106 , H03F2203/7221 , H04B1/04 , H04B1/0475 , H04B2001/0416 , H04B2001/045
摘要： Apparatus and methods for envelope tracking systems are provided. In certain configurations, an envelope tracking system includes a digital filter that generates a filtered envelope signal based on a digital envelope signal representing an envelope of a radio frequency signal, a buck converter controllable by the filtered envelope signal and including an output electrically connected to a power amplifier supply voltage, a digital-to-analog converter module including an output electrically connected to the output of the buck converter and that provides an output current, and a digital shaping and delay circuit configured to generate a shaped envelope signal based on shaping the filtered envelope signal. The shaped envelope signal controls a magnitude of the output current, and the digital shaping and delay circuit controls a delay of the shaped envelope signal to align the output of the digital-to-analog converter module and the output of the buck converter.
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公开(公告)号：US20180278214A1
公开(公告)日：2018-09-27
申请号：US15716493
申请日：2017-09-26
发明人： Boshi JIN , Jing-Hwa CHEN , Paul T. DICARLO , Steven Christopher SPRINKLE , Florinel G. BALTEANU , David Scott WHITEFIELD
CPC分类号： H03F1/0288 , H03F3/193 , H03F3/211 , H03F3/245 , H03F3/604 , H03F3/72 , H03F2200/111 , H03F2200/451 , H03F2203/21106 , H03F2203/7209 , H03F2203/7221 , H05K999/99
摘要： A power amplifier can include a carrier amplifier having first and second differential amplification cells with outputs coupled by a primary loop of a carrier transformer, and a peaking amplifier having first and second differential amplification cells with outputs coupled by a primary loop of a peaking transformer. The power amplifier can further include a combiner having a quarter-wave circuit implemented between the secondary loop of the carrier transformer and a secondary loop of the peaking transformer. The quarter-wave circuit can be configured to provide a characteristic impedance, such that the carrier and peaking amplifiers are presented with an impedance that is approximately the same as the characteristic impedance when both of the carrier and peaking amplifiers are turned on, and the carrier amplifier is presented with an impedance that is approximately twice the characteristic impedance when the carrier amplifier is turned on and the peaking amplifier is turned off.
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公开(公告)号：US09998078B2
公开(公告)日：2018-06-12
申请号：US14539769
申请日：2014-11-12
发明人： Dong-Ju Lee , Ji-Woo Lee
IPC分类号： H03F3/04 , H03F1/52 , H04W52/02 , H03F3/24 , H03F3/72 , G06F1/20 , H03F1/30 , H03F3/21 , H03F1/02 , H04M1/725
CPC分类号： H03F1/526 , G06F1/206 , H03F1/0288 , H03F1/30 , H03F1/301 , H03F1/302 , H03F3/04 , H03F3/211 , H03F3/24 , H03F3/72 , H03F2200/447 , H03F2200/468 , H03F2203/7215 , H03F2203/7221 , H03F2203/7236 , H04M1/72569 , H04M2250/12 , H04M2250/22 , H04W52/0254 , Y02D70/00 , Y02D70/142 , Y02D70/144 , Y02D70/166
摘要： A method for an electronic device includes amplifying a signal by a first power amplifier, obtaining a temperature of the first power amplifier during the amplification of the signal, comparing the temperature of the first power amplifier to a predetermined threshold value, and switching the first power amplifier to a second power amplifier for amplifying a signal if the temperature of the first power amplifier is higher than a threshold value. An electronic device for switching power amplifiers are also disclosed.
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公开(公告)号：US20180138861A1
公开(公告)日：2018-05-17
申请号：US15788025
申请日：2017-10-19
发明人： Lui Lam , Mark M. Doherty
CPC分类号： H03F1/0222 , H03F1/0266 , H03F1/0277 , H03F1/56 , H03F3/195 , H03F3/217 , H03F3/245 , H03F3/72 , H03F2200/111 , H03F2200/165 , H03F2200/336 , H03F2200/351 , H03F2200/387 , H03F2200/429 , H03F2200/451 , H03F2200/555 , H03F2203/7209 , H03F2203/7221 , H03F2203/7236 , H04B1/04
摘要： Aspects of this disclosure relate to dynamic error vector magnitude (DEVM) compensation. In one embodiment, an apparatus includes an amplifier, a low pass filter, and a bias circuit. The amplifier, such as a power amplifier, can amplify an input signal. The low pass filter, such as an integrator, can generate a correction signal based at least partly on an indication of a duty cycle of the amplifier. The indication of the duty cycle of the amplifier can be an enable signal for the amplifier, for example. The bias circuit can generate a bias signal based at least partly on the correction signal and provide the bias signal to the amplifier to bias the amplifier.
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公开(公告)号：US09973153B2
公开(公告)日：2018-05-15
申请号：US15361777
申请日：2016-11-28
发明人： Apostolos Samelis
CPC分类号： H03F1/56 , H03F1/0261 , H03F1/0277 , H03F1/486 , H03F1/565 , H03F3/195 , H03F3/245 , H03F3/72 , H03F2200/108 , H03F2200/111 , H03F2200/222 , H03F2200/318 , H03F2200/36 , H03F2200/387 , H03F2200/391 , H03F2200/402 , H03F2200/411 , H03F2200/414 , H03F2200/421 , H03F2200/451 , H03F2200/516 , H03F2203/7221 , H03F2203/7236 , H04B1/006 , H04B1/44
摘要： Disclosed are systems, devices, and methodologies to reduce harmonics in a radio frequency output signal. A power amplifier system comprises a power amplifier and a tunable output matching network electrically connected between the output of the power amplifier and an output of the tunable output matching network. The tunable output matching network reduces second-order harmonics in an amplified radio frequency signal when the power amplifier operates in a low frequency mode. The tunable output matching network includes traps such as a series inductor and a first capacitor in series with a first switch, a second capacitor in series with a second switch, and a third capacitor in series with a third switch, where the traps are tuned to selected harmonic frequencies when the power amplifier operates in the low frequency band of the operating band of frequencies.
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公开(公告)号：US20180048273A1
公开(公告)日：2018-02-15
申请号：US15235521
申请日：2016-08-12
发明人： Jeremy GOLDBLATT
CPC分类号： H03F3/211 , H03F1/0277 , H03F3/195 , H03F3/213 , H03F3/602 , H03F3/72 , H03F2200/396 , H03F2200/414 , H03F2200/417 , H03F2200/421 , H03F2200/426 , H03F2200/432 , H03F2200/451 , H03F2200/513 , H03F2203/21175 , H03F2203/7221 , H03F2203/7224 , H03F2203/7236 , H03F2203/7239 , H03K17/693 , H04B1/04 , H04B1/16
摘要： Certain aspects of the present disclosure provide a switch architecture for switching between a low power amplifier and a high power amplifier. One example amplification system includes a high power amplifier and a low power amplifier. The amplification system further includes a first switch coupled between the high power amplifier and an output. The amplification system further includes a second switch coupled between the output and a reference potential. The second switch is further coupled between the low power amplifier and the output and configured to selectively couple the low power amplifier to the output. The amplification system further includes a third switch coupled between the low power amplifier and the second switch.
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公开(公告)号：US20170272036A1
公开(公告)日：2017-09-21
申请号：US15383261
申请日：2016-12-19
发明人： Chung-Yu WU , Ya-Syuan SUNG
CPC分类号： H03F1/0205 , A61B5/04004 , A61B5/0428 , H03F1/08 , H03F3/187 , H03F3/45071 , H03F3/45197 , H03F3/45973 , H03F3/68 , H03F3/72 , H03F2200/261 , H03F2200/267 , H03F2200/408 , H03F2200/462 , H03F2203/45156 , H03F2203/45288 , H03F2203/45528 , H03F2203/45701 , H03F2203/7215 , H03F2203/7221 , H03G1/0029 , H03G1/0088 , H03G3/001 , H03G3/3005 , H03G3/3084 , H03G5/28 , H03H11/0422
摘要： A front-end amplifier circuit for receiving a biological signal includes a signal channel. The signal channel amplifies the biological signal to generate a detection current and includes a capacitive-coupled transconductance amplifier. The capacitive-coupled transconductance amplifier amplifies the biological signal with a transconductance gain to generate a first current.
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