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公开(公告)号：US20230188103A1
公开(公告)日：2023-06-15
申请号：US18078957
申请日：2022-12-10
发明人： Kang Yoon LEE , Reza EFTEKHARI RAD , Yeon Jae JUNG , Jong Wan JO
CPC分类号： H03F3/245 , H03F3/45179 , H03G1/0023 , H03G1/0088 , H03F2200/451
摘要： A technology related to a power amplifier used in a wireless communication circuit is disclosed. A radio frequency (RF) power amplifier includes a plurality of unit differential amplifiers of which inputs are connected to a common input terminal and outputs are connected to a common adder, and having a gain of a weight of a corresponding bit of a binary gain control word. Each of the differential amplifiers may be configured as a complementary metal-oxide semiconductor (CMOS) differential cascode amplifier. In addition, the RF power amplifier may include a structure in which a plurality of attenuators of the same structure are cascade-connected so that an attenuation rate may be linearly and digitally controlled and an output of each attenuator is connected to an output adder through differential buffers of which turn-on and turn-off are controlled by a controller.
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公开(公告)号：US20190229683A1
公开(公告)日：2019-07-25
申请号：US16371255
申请日：2019-04-01
发明人： Serban Motoroiu , Jim Nolan
CPC分类号： H03F1/12 , H03F1/342 , H03F3/45179 , H03F3/45183 , H03F3/45672 , H03F2200/258 , H03F2200/261 , H03F2203/45048 , H03F2203/45138 , H03F2203/45341 , H03F2203/45342 , H03F2203/45466 , H03F2203/45494 , H03F2203/45504 , H03F2203/45511 , H03F2203/45521 , H03G1/0023 , H03G1/0029 , H03G1/0088
摘要： A current feed-back instrumentation amplifier (CFIA) comprises a differential pair with degeneration for amplifying small differential voltages in the presence of large common-mode voltages. The CFIA includes input and feedback transconductors and a trimming circuit that trims the back-bias voltages of the transistors in each transconductor. The trimming circuit includes a plurality of selectable resistors disposed in the signal path of the tail current in each transconductor. Each of the plurality of selectable resistors has a switch coupled to it. When a switch is closed, only the resistors up to the respective switch are in the signal path of the bulk-to-source voltage of the differentially paired transistors. The resistor trimming circuit reduces the mismatch between transconductances of the respective differential pair transistors, in turn reducing mismatch of the overall transconductances of the transconductors, and thereby reducing the CFIA's gain error.
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公开(公告)号：US20180323762A1
公开(公告)日：2018-11-08
申请号：US15901623
申请日：2018-02-21
发明人： Serban Motoroiu , Jim Nolan
CPC分类号： H03G3/30 , H03F1/26 , H03F3/45179 , H03F3/45183 , H03F3/45659 , H03F2200/129 , H03F2200/261 , H03F2203/45048 , H03F2203/45392 , H03F2203/45466 , H03F2203/45468 , H03F2203/45504 , H03F2203/45511 , H03F2203/45521 , H03F2203/45528 , H03F2203/45534 , H03G1/0023 , H03G1/0029
摘要： A current feed-back instrumentation amplifier (CFIA) comprises a differential pair with degeneration for amplifying small differential voltages in the presence of large common-mode voltages. The CFIA includes input and feedback transconductors and a chopping modulator circuit that continuously swaps tail current sources between the transconductors. This tail current swapping reduces the contribution to the CFIA's gain error caused by random mismatch between the tail currents of the input and feedback transconductors. The modulator circuit operates on a clock cycle to periodically swap the tail current sources. As a result, even if the tail currents are mismatched, on average the tail currents (transconductor gains) will approximately equal out, and the contribution of the tail current difference to the gain error is canceled out.
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4.发明申请公开(公告)号：US20180152164A1
公开(公告)日：2018-05-31
申请号：US15609492
申请日：2017-05-31
发明人： Angelo Scuderi , Gesualdo Alessi , Antonino Calcagno , Giorgio Maiellaro , Salvatore Scaccianoce
CPC分类号： H03G3/34 , H03F1/0216 , H03F1/305 , H03F3/189 , H03F3/19 , H03F3/21 , H03F3/45475 , H03F3/72 , H03F2200/451 , H03F2203/7221 , H03G1/0023 , H03G3/3005 , H03G3/3042 , H03G3/3047
摘要： Systems and methods for switching on and off a power amplifier including a signal input receiving an input signal and a signal output providing an output signal. The power amplifier includes a control input receiving a gain control signal indicating a requested gain and a control input receiving a mute control signal indicating whether the signal output should be switched on or switched off. A control unit determines whether the signal output of the power amplifier should be switched on and/or off, and if switched on receives data identifying a switch-on ramp and if switched off receives data identifying a switch-off ramp. The control unit generates the mute control signal to switch on the signal output of the power amplifier on or off, and generates the gain control signal as a function of the data identifying the switch-on or switch-off ramp to thereby increase or decrease the gain control signal.
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公开(公告)号：US09960737B1
公开(公告)日：2018-05-01
申请号：US15451184
申请日：2017-03-06
发明人： David Kovac
CPC分类号： H03F1/0222 , G05F1/56 , H03F1/0266 , H03F1/223 , H03F3/193 , H03F3/195 , H03F3/21 , H03F3/245 , H03F2200/18 , H03F2200/375 , H03F2200/451 , H03F2200/555 , H03F2200/61 , H03G1/0023 , H03G1/0029
摘要： Systems, methods and apparatus for efficient power control of an RF amplifier for amplification of a constant envelope RF signal are described. A reduction in a size of a pass device of an LDO regulator is obtained by removing the pass device of the LDO regulator from a main current conduction path of the RF amplifier. Power control is provided by varying one or more gate voltages to cascoded transistors of a transistor stack of the RF amplifier according to a power control voltage. Various configurations for controlling the gate voltages are presented by way of a smaller size LDO regulator or by completely removing the LDO regulator. In a case where a supply voltage to the transistor stack varies, such as in a case of a battery, a compensation circuit is used to adjust the power control voltage in view of a variation of the supply voltage, and therefore null a corresponding drift in output power of the RF amplifier.
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公开(公告)号：US20180109233A1
公开(公告)日：2018-04-19
申请号：US15730953
申请日：2017-10-12
发明人： Shingo SAKAMOTO
CPC分类号： H03G3/007 , G05F1/10 , H03F1/0227 , H03F1/0238 , H03F1/0255 , H03F1/30 , H03F3/213 , H03F3/245 , H03F3/3022 , H03F3/45475 , H03F2200/321 , H03F2200/447 , H03F2201/3215 , H03F2203/45528 , H03G1/0023 , H03G1/0029 , H03G1/0035 , H03G3/3042
摘要： Use of a closed loop APC may involve a problem of cost and power consumption due to increased circuit scale.The semiconductor device includes a power amplifier that amplifies an output from a transmission circuit and a regulator that supplies power to the power amplifier. The regulator includes an operational amplifier comprising a loop gain control circuit and a loop gain control voltage generation circuit that supplies control voltage to the loop gain control circuit. The loop gain control voltage generation circuit minimizes a loop gain of the operational amplifier when starting up the regulator.
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公开(公告)号：US20180069520A1
公开(公告)日：2018-03-08
申请号：US15602532
申请日：2017-05-23
发明人： Quochoang DUONG , Yus KO , Jeongwoon KONG , Hyunseok SHIN
CPC分类号： H03G3/3089 , H03F1/3211 , H03F3/45 , H03F3/45071 , H03F3/45183 , H03F3/45475 , H03F2203/45022 , H03F2203/45116 , H03F2203/45522 , H03F2203/45528 , H03F2203/45538 , H03F2203/45591 , H03F2203/45594 , H03G1/0023 , H03G1/0088 , H03G3/001
摘要： The inventive concepts relate to variable gain amplifiers. The variable gain amplifier including an amplifier, a first fixed resistor and a first variable resistor, a second fixed resistor and a second variable resistor, a third fixed resistor and a third variable resistor, a fourth fixed resistor and a fourth variable resistor, a first output terminal and a second output terminal, and a decoder may be provided. The decoder is configured to receive first control bits, generate second control bits from the first control bits, generate third and fourth control bits from the first or second control bits, respectively, transmit the first control bits and the third control bits to the third and fourth variable resistors to adjust resistance values, and transmit the second and fourth control bits to first and second variable resistors to adjust resistance values.
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公开(公告)号：US20170346448A1
公开(公告)日：2017-11-30
申请号：US15607935
申请日：2017-05-30
申请人： Qorvo US, Inc.
发明人： George Maxim , Marcus Granger-Jones , Kelvin Kai Tuan Yan , Dirk Robert Walter Leipold , Baker Scott
CPC分类号： H03F1/26 , H03F1/0288 , H03F1/32 , H03F1/3211 , H03F3/211 , H03F3/602 , H03F3/72 , H03F2200/294 , H03F2203/21109 , H03F2203/7236 , H03G1/0023 , H03G1/0088
摘要： LNA circuitry includes an input node, and output node, a primary amplifier stage, a first ancillary amplifier stage, and an input gain selection switch. The primary amplifier stage is configured to provide a first gain response between a primary amplifier stage input node and a primary amplifier stage output node, wherein the primary amplifier stage input node is coupled to the input node and the primary amplifier stage output node is coupled to the output node. The first ancillary amplifier stage is configured to provide a second gain response between a first ancillary amplifier stage input node and a first ancillary amplifier stage output node, wherein the first ancillary amplifier stage output node is coupled to the primary amplifier stage output node. The input gain selection switch is coupled between the input node and the first ancillary amplifier stage input node.
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公开(公告)号：US09755602B2
公开(公告)日：2017-09-05
申请号：US14258634
申请日：2014-04-22
发明人： Eberhard Brunner , Jeff Venuti
CPC分类号： H03G3/3042 , H03F3/19 , H03F3/4508 , H03F2200/336 , H03F2200/451 , H03F2203/45116 , H03F2203/45154 , H03F2203/45306 , H03G1/0023
摘要： A system has a baseband gain stage to receive incoming in-phase and quadrature voltage signals and output in-phase and quadrature current signals, a mixer core arranged to receive the in-phase and quadrature current signals and output radio frequency signals, and a variable gain amplifier to receive the radio frequency signals and produce a broadband radio signal.
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公开(公告)号：US09755429B2
公开(公告)日：2017-09-05
申请号：US14943673
申请日：2015-11-17
发明人： Tao Wen Chung , Chan-Hong Chern , Ming-Chieh Huang , Chih-Chang Lin , Yuwen Swei
CPC分类号： H02H9/04 , H01L23/60 , H01L27/0248 , H01L2924/0002 , H03F2200/294 , H03F2203/45638 , H03G1/0023 , H03K3/35613 , H03K19/018514 , H01L2924/00
摘要： A method of increasing a current flowing through an inductor includes receiving an input signal with a driver stage, the driver stage including the inductor coupled in series with a loading between an output node of the driver stage and a power line. In response to a transition in the input signal from a first voltage state to a second voltage state, a first current flowing through the loading and the inductor is increased. During the transition in the input signal, the current flowing through the inductor is increased by increasing a second current in a circuitry though a node between the inductor and the loading.
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