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公开(公告)号：US20240364274A1
公开(公告)日：2024-10-31
申请号：US18307494
申请日：2023-04-26
发明人： Shota Ishihara , Rui Ma
CPC分类号： H03F1/301 , H03F1/56 , H03F3/211 , H03F2200/21 , H03F2200/222 , H03F2200/387 , H03F2200/451
摘要： Stacked amplifier architectures that have bias circuits that are tolerant of supply voltage variations, which provide good reliability, are fast to follow VCC changes, and exhibit small variations in gain as VCC varies. One embodiment encompasses a bias circuit for an amplifier stack, including a source follower circuit configured to output a bias voltage to a transistor within the amplifier stack and configured to be coupled to a variable voltage, and a controller coupled to the source follower circuit, configured to be coupled to a constant voltage, and configured to apply a constant voltage to the source follower circuit. The source follower circuit generates a reference voltage and (1) outputs a constant bias voltage when the variable voltage is above the reference voltage, and (2) outputs a bias voltage proportional to the variable voltage when the variable voltage is below the reference voltage.
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公开(公告)号：US12132456B2
公开(公告)日：2024-10-29
申请号：US18357989
申请日：2023-07-24
发明人： Bei-Shing Lien , Jaw-Juinn Horng
CPC分类号： H03F3/45179 , H03F3/193 , H03F3/211 , H03F3/45475 , H03F2200/171 , H03F2200/372
摘要： A noise detecting circuit including an amplifier circuit amplifying an input signal indicating a noise level of a circuit to be detected and output an amplified signal; a filtering circuit receiving and filtering the amplified signal and output a filtered signal; and a comparing circuit receiving and compare the filtered signal to a reference voltage and output an output signal; wherein the filtering circuit includes: an output terminal; and a first filter selectively coupled to the output terminal, including: a sub-output terminal; a switch selectively coupling the sub-output terminal to the output terminal; a resistor, wherein a terminal of the resistor is coupled to the amplifier circuit and another terminal of the resistor is coupled to the sub-output terminal; and a capacitor, wherein a terminal of the capacitor is coupled to the sub-output terminal and another terminal of the capacitor is coupled to a reference voltage source.
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公开(公告)号：US20240356498A1
公开(公告)日：2024-10-24
申请号：US18685515
申请日：2022-10-25
发明人： Jung Hyun KIM , Sungwoon HWANG , Sungyoon KANG , Sooji BAE , Byeongcheol YOON
CPC分类号： H03F1/56 , H03F3/211 , H03F3/213 , H03F2200/387 , H03F2200/541
摘要： The present disclosure relates to a dual-mode power amplifier, there is disclosed a dual-mode power amplifier that can selectively operate in a low-power mode for low output and a high-power mode for high output, the dual-mode power amplifier including a high-power amplifier comprising one or more transistors whose operations are controlled by a first bias; a first transformer connected in series to an output stage of the high-power amplifier; a low-power amplifier comprising one or more transistors whose operations are controlled by a second bias; and a second transformer connected in series to an output stage of the low-power amplifier, wherein the dual-mode power amplifier operates in a high-power mode when the first bias is activated and the second bias is deactivated, and operates in a low-power mode when the first bias is deactivated and the second bias is activated.
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公开(公告)号：US20240348210A1
公开(公告)日：2024-10-17
申请号：US18752957
申请日：2024-06-25
发明人： Takuma TORII , Yuji KOMATSUZAKI , Ao YAMASHITA
CPC分类号： H03F1/0288 , H03F3/211
摘要： An amplifier includes a signal acquiring unit that acquires an input signal, which is a digital signal, a signal generation unit that generates an in-phase signal, an orthogonal signal, and an envelope signal by using the input signal, and a signal distribution unit that generates a first signal and a second signal by using the in-phase signal, the orthogonal signal, and the envelope signal, a differential value of a function representing either or both an amplitude ratio and a phase difference is continuous during transition of the envelope signal from a minimum value to a maximum value.
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公开(公告)号：US20240313732A1
公开(公告)日：2024-09-19
申请号：US18601676
申请日：2024-03-11
发明人： Marko PESSA , David ZAPATA
CPC分类号： H03G3/3036 , H03F3/211 , H03F2200/451 , H03G2201/103 , H03G2201/307
摘要： An amplifier circuit portion is proved. The amplifier circuit is arranged to amplify an input signal with a gain based on a gain control signal. The amplifier circuit portion comprises a plurality of amplifier cells having a common input for receiving the input signal and a common output for providing an amplified version of the input signal. At least one of the amplifier cells is operable in: a controllable gain mode in which the amplifier cell provides an amplification gain to the input signal based on the gain control signal; and a fixed gain mode in which the amplifier cell provides a fixed, non-zero amplification gain to the input signal.
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公开(公告)号：US12088255B2
公开(公告)日：2024-09-10
申请号：US17344789
申请日：2021-06-10
申请人： NXP USA, Inc.
CPC分类号： H03F1/0288 , H03F3/211
摘要： A Doherty amplifier includes a peaking amplifier, a carrier amplifier, and a combining node electrically connected to the carrier amplifier and the peaking amplifier. The Doherty amplifier includes a harmonic control circuit coupled to the combining node. The harmonic control circuit includes an inductor and a capacitor and the inductor and capacitor are connected in series between the first current conducting terminal and a ground reference node. An inductance value of the inductor of the harmonic control circuit and a capacitance value of the capacitor of the harmonic control circuit are selected to terminate second order harmonic components of a fundamental frequency of a signal generated by the carrier amplifier.
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公开(公告)号：US20240275338A1
公开(公告)日：2024-08-15
申请号：US18609940
申请日：2024-03-19
CPC分类号： H03F1/30 , H03F1/0261 , H03F1/22 , H03F1/302 , H03F3/191 , H03F3/195 , H03F3/211 , H03F3/24 , H03F3/245 , H03F2200/447 , H03F2200/451 , H03F2200/468 , H03F2203/21106 , H04B2001/0408
摘要： Methods related to power amplification systems with adjustable common base bias. A method of implementing a power amplification system can include providing a cascode amplifier coupled to a radio-frequency input signal and coupled to a radio-frequency output. The method can further include providing a biasing component configured to apply one or more biasing signals to the cascode amplifier, the biasing component including a bias controller and one or more bias components. Each respective bias component may be coupled to a respective bias transistor.
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公开(公告)号：US12040756B2
公开(公告)日：2024-07-16
申请号：US17312613
申请日：2019-04-04
发明人： Takaaki Yoshioka , Kenji Harauchi
CPC分类号： H03F3/21 , H03F3/211 , H03F3/602 , H03F2200/451
摘要： A power amplifier includes: plural amplifiers; a tournament-tree-shaped circuit connected with the plural amplifiers and including plural transmission lines arranged in a tournament-tree shape; and plural difference frequency short circuits shunt-connected with plural nodes of the tournament-tree-shaped circuit, wherein each of the plural difference frequency short circuits includes an inductor and a capacitor connected in series, resonant frequencies of the plural difference frequency short circuits become lower as the plural difference frequency short circuits are more separated from the plural amplifiers, and the difference frequency short circuits having equivalent resonant frequencies are connected with plural nodes in the same stage among the plural nodes.
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9.发明授权公开(公告)号：US12040749B2
公开(公告)日：2024-07-16
申请号：US17217439
申请日：2021-03-30
CPC分类号： H03F1/0205 , A61B17/320068 , A61B18/1206 , H03F3/211 , A61B2018/00994 , A61B2218/002 , A61B2218/008 , H03F2200/451
摘要： A dual amplifier apparatus is disclosed. The apparatus includes an energy module having a controller and a first and second power amplifier circuit coupled to the controller. The first and second power amplifier circuits are configured to receive and amplify an input signal to generate a first output signal into a load coupled to the output of the first and second power amplifier circuit. A power rating of the first amplifier circuit is different from a power rating of the second amplifier circuit. The controller is configured to select the first or the second power amplifier circuit.
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公开(公告)号：US12034419B2
公开(公告)日：2024-07-09
申请号：US17737054
申请日：2022-05-05
发明人： Kwangmo Chris Lim , Basim Noori , Qianli Mu , Marvin Marbell , Scott Sheppard , Alexander Komposch
摘要： RF transistor amplifiers include an RF transistor amplifier die having a semiconductor layer structure, a coupling element on an upper surface of the semiconductor layer structure, and an interconnect structure on an upper surface of the coupling element so that the RF transistor amplifier die and the interconnect structure are in a stacked arrangement. The coupling element includes a first shielded transmission line structure.
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