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公开(公告)号：US20050073357A1
公开(公告)日：2005-04-07
申请号：US10820675
申请日：2004-04-07
Applicant: Lorenzo Carpineto , Eric Duvivier , Stefano Cipriani
Inventor： Lorenzo Carpineto , Eric Duvivier , Stefano Cipriani
CPC classification number: H03F1/0272 , H03F3/45188 , H03F2200/294 , H03F2200/372 , H03F2203/45048 , H03F2203/45396 , H03G3/3036 , H03G2201/103 , H03G2201/206 , H03G2201/307
Abstract: A low noise amplifier circuit (10) includes an attenuator (12) for receiving a calibration signal and generating an attenuated calibration signal. A low noise amplifier (14) amplifies the attenuated calibration signal in calibration mode or amplifies a functional signal in functional mode. In calibration mode, a envelope detector/comparator (16) compares the calibration signal with the output of the low noise amplifier and generates a compensation signal indicating a deviation between the two signals. The gain of the low noise amplifier is adjusted responsive to the compensation signal.
Abstract translation: 低噪声放大器电路（10）包括用于接收校准信号并产生衰减的校准信号的衰减器（12）。 低噪声放大器（14）在校准模式下放大衰减的校准信号，或者在功能模式下放大功能信号。 在校准模式中，包络检测器/比较器（16）将校准信号与低噪声放大器的输出进行比较，并产生指示两个信号之间的偏差的补偿信号。 响应补偿信号调整低噪声放大器的增益。
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公开(公告)号：US20040185807A1
公开(公告)日：2004-09-23
申请号：US10694451
申请日：2003-10-27
Inventor： Balasubramanian Ramachandran
IPC: H01Q011/12 , H04B001/04
CPC classification number: H04W52/267 , H03G3/004 , H03G3/3042 , H03G2201/103 , H03G2201/307 , H03G2201/40 , H03G2201/508 , H04B1/109 , H04L1/0001 , H04W52/08 , H04W52/38
Abstract: A dynamically varying linearity system nullDVLSnull capable of varying the linearity of a radio frequency (RF) front-end of a communication device responsive to receiving a condition signal indicating a desired mode of operation of a transmitter. The DVLS may include a condition signal indicative of the desired mode of operation and a controller that adjusts the linearity of the transmitter responsive to the condition signal. The condition signal may be responsive to a user interface. The controller, responsive to the condition signal, may dynamically adjust the operating current of the transmitter.
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公开(公告)号：US12101069B2
公开(公告)日：2024-09-24
申请号：US17707735
申请日：2022-03-29
Applicant: Space Exploration Technologies Corp.
Inventor： Frederic Duez , Frederic Paillardet
CPC classification number: H03G3/3036 , H03F3/19 , H04B1/04 , H03F2200/451 , H03G2201/103 , H03G2201/307
Abstract: Technologies are provided for variable gain amplifiers (VGAs). An example VGA includes a resistor ladder including resistor legs coupled to first and second resistors; first differential switches connected to the resistor ladder and second differential switches connected to output nodes, a transistor in each of the first differential switches being coupled to an first electrical line interconnecting the first resistors and a different transistor in each of the first differential switches being coupled to a second electrical line interconnecting the second resistors; third differential switches connected to the resistor ladder and fourth differential switches connected to the output nodes, a transistor in each of the third differential switches being coupled to the first electrical line and a different transistor in each of the fourth differential switches being coupled to the second electrical line; and a pair of transistors respectively connected to the first differential switches and the third differential switches.
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公开(公告)号：US12088268B2
公开(公告)日：2024-09-10
申请号：US17362885
申请日：2021-06-29
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Yunchao Guan , Lei Lu
CPC classification number: H03G3/3036 , H03F3/193 , H03F2200/451 , H03G2201/103 , H03G2201/307 , H04B1/04 , H04B1/16 , H04B1/40
Abstract: A variable-gain amplifier and a phased array system are provided. A variable-gain amplifier includes a cascode circuit comprising a first amplification transistor and a second amplification transistor array that are cascaded, the second amplification transistor array comprising a plurality of second amplification transistors connected in parallel and configured to output an adjustable current to an output matching network, the first amplification transistor is a common-source transistor, the plurality of second amplification transistors are common-gate transistors, or the cascode circuit is a common-emitter common-base circuit, the first amplification transistor is a common-emitter amplification circuit, and the second amplification transistor array is a common-base amplification circuit. The variable-gain amplifier further including a variable capacitor circuit coupled to the second amplification transistor array and coupled to the output matching network at first nodes.
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公开(公告)号：US20240223136A1
公开(公告)日：2024-07-04
申请号：US18148293
申请日：2022-12-29
Applicant: Apple Inc.
Inventor： Mina Mofreh Gad Elsayed Abdallah
CPC classification number: H03F3/19 , H03G3/3036 , H04B1/40 , H03F2200/451 , H03G2201/103 , H03G2201/307
Abstract: An electronic device with wireless circuitry is provided. The wireless circuitry can include a radio-frequency data converter block configured to receive baseband signals and to output corresponding radio-frequency signals to a radio-frequency power amplifier. The radio-frequency data converter block may include one or more radio-frequency digital-to-analog converter (DAC) cells configured to receive an oscillator signal. The radio-frequency data converter block can exhibit a gain that is controlled using gain control circuitry. The gain control circuitry can control the gain of the radio-frequency data converter block by selectively enabling switchable components within each DAC cell to realize an incremental gain step of a first resolution and by adjusting the duty cycle of the oscillator signal to realize an incremental gain step of a second resolution finer than the first resolution.
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Patent Agency Ranking
公开(公告)号：US20240072749A1
公开(公告)日：2024-02-29
申请号：US18236866
申请日：2023-08-22
Applicant: Nordic Semiconductor ASA
Inventor： Paal KASTNES , Czeslaw MAKARSKI , Jedrzej CIUPIS , Andrzej KUROS , Artur HADASZ , Piotr SLAWECKI , Dawid PRZYBYLO
CPC classification number: H03G3/3042 , H03F3/245 , H03F2200/451 , H03G2201/103 , H03G2201/307 , H04B1/04
Abstract: A control portion for controlling an amplifier portion of a transmitter device is provided. The amplifier portion is arranged to amplify a radio signal with a transmission gain based at least partially on a gain control signal and having a nominal gain relationship between the gain control signal and the transmission gain. The control portion is arranged to determine a desired transmission gain, to determine one or more operating conditions, to calculate a gain control signal for causing the amplifier portion to apply the desired transmission gain, taking into account the nominal gain relationship and the one or more operating conditions, and to output said gain control signal. The gain control signal is different to a gain control signal calculated based only on the nominal gain relationship.
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公开(公告)号：US11804812B2
公开(公告)日：2023-10-31
申请号：US17941798
申请日：2022-09-09
Applicant: Nordic Semiconductor ASA
Inventor： Jani Ståhlberg , Timo Sillanpää
CPC classification number: H03G3/3036 , H03F3/19 , H04B1/0057 , H04B1/40 , H04B1/715 , H03F2200/451 , H03G2201/103 , H03G2201/307 , H04B2001/7152
Abstract: A method of operating a radio receiver device comprises receiving a plurality of signals with a plurality of corresponding frequencies; applying respective gains to each of the plurality of signals; and storing the gain applied to each signal and its corresponding frequency. The method comprises subsequently receiving a further signal with a further frequency; and applying a further gain to the further signal. The further gain is determined using at least one of the stored gains according to a difference between the further frequency and at least one of the plurality of corresponding frequencies.
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公开(公告)号：US20230299732A1
公开(公告)日：2023-09-21
申请号：US18324585
申请日：2023-05-26
Applicant: Skyworks Solutions, Inc.
Inventor： Yu-Jui Lin , Wei Zhang , David Steven Ripley , Vignesh Sridharan
CPC classification number: H03G3/3042 , H03F3/245 , H03F1/0233 , H04B1/40 , H03G2201/307 , H03F2200/105 , H03F2200/451 , H03G2201/103
Abstract: Envelope tracking power amplifiers with advanced gain shaping are provided. In certain implementations, a power amplifier system includes a power amplifier that amplifies a radio frequency (RF) signal and an envelope tracker that controls a voltage level of a supply voltage of the power amplifier based on an envelope of the RF signal. The power amplifier system further includes a gain shaping circuit that generates a gain shaping current that changes with the voltage level of the supply voltage from the envelope tracker. For example, the gain shaping circuit can include an analog look-up table (LUT) mapping a particular voltage level of the supply voltage to a particular current level of gain shaping current. Additionally, the gain shaping circuit biases the power amplifier based on the gain shaping current.
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公开(公告)号：US11705877B2
公开(公告)日：2023-07-18
申请号：US17305111
申请日：2021-06-30
Applicant: Skyworks Solutions, Inc.
Inventor： Yu-Jui Lin , Wei Zhang , David Steven Ripley , Vignesh Sridharan
CPC classification number: H03G3/3042 , H03F1/0233 , H03F3/245 , H04B1/40 , H03F2200/105 , H03F2200/451 , H03G2201/103 , H03G2201/307
Abstract: Envelope tracking power amplifiers with advanced gain shaping are provided. In certain implementations, a power amplifier system includes a power amplifier that amplifies a radio frequency (RF) signal and an envelope tracker that controls a voltage level of a supply voltage of the power amplifier based on an envelope of the RF signal. The power amplifier system further includes a gain shaping circuit that generates a gain shaping current that changes with the voltage level of the supply voltage from the envelope tracker. For example, the gain shaping circuit can include an analog look-up table (LUT) mapping a particular voltage level of the supply voltage to a particular current level of gain shaping current. Additionally, the gain shaping circuit biases the power amplifier based on the gain shaping current.
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公开(公告)号：US20190068128A1
公开(公告)日：2019-02-28
申请号：US16047176
申请日：2018-07-27
Applicant: MediaTek, Inc.
Inventor： Chih-Hao Sun , Po-Yun Hsiao , Chin-Yen Chao , Yi-Bin Lee
CPC classification number: H03F1/083 , H03F1/0205 , H03F1/0277 , H03F1/18 , H03F3/193 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/294 , H03F2200/451 , H03G3/3042 , H03G2201/103 , H03G2201/307 , H04B1/04 , H04B2001/0408
Abstract: A communication unit includes a plurality of parallel radio frequency, RF, signal paths. Located between a first RF signal path of the plurality of parallel RF signal paths comprising at least one first RF amplifier and a second signal path comprising at least one second RF amplifier is one of a shared inductor or shared transformer. The at least one first RF amplifier is coupled to a supply voltage via a first switch and at least one second RF amplifier is coupled to the supply voltage via a second switch, and the first switch is closed that provides the supply voltage to the at least one second RF amplifier whilst the second switch is opened.
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