公开(公告)号：US20240355352A1

公开(公告)日：2024-10-24

申请号：US18684665

申请日：2021-08-17

申请人： Sung-Do Chun ,  Ji Won Jun

发明人： Sung-Do Chun ,  Ji Won Jun

IPC分类号： G11B5/004 ,  H03F3/20

CPC分类号： G11B5/004 ,  H03F3/20

摘要： A sound source processing apparatus uses a magnetic drum to prevent sound quality deterioration and amplify the volume of sound when a sound source transmitted from a primary acoustic device is outputted. The apparatus receives, through an input end, a sound source outputted from the primary acoustic device, records the inputted sound source on a recording part (a magnetic coating surface) of the magnetic drum in a magnetic drum recorder, reproduces, in real time, the sound source recorded on the magnetic drum, and then amplifies it, sequentially passing the amplified sound source through a pre-amplifier and a power amplifier to amplify output and then sending it to a speaker. To prevent sound quality deterioration for repetitive playback, interaction caused by contact between sound sources is removed. Amplifying the volume of sound outputted in real time using the magnetic drum promotes enhanced sound quality.

公开(公告)号：US20240204870A1

公开(公告)日：2024-06-20

申请号：US18167136

申请日：2023-02-10

申请人： NXP B.V.

发明人： Achal Venkatesh ,  Birama Goumballa

IPC分类号： H04B10/079 ,  H03F3/20 ,  H03M1/66

CPC分类号： H04B10/07955 ,  H03F3/20 ,  H03M1/66

摘要： An integrated circuit includes a functional circuit and a power calibration and monitoring system including a digital-to-analog converter (DAC), a variable gain amplifier (VGA), and a counter. The DAC generates a differential pair of feedback currents based on a digital count. The VGA generates a differential pair of amplified signals based on a magnitude difference between the differential pair of feedback currents and a differential pair of detection currents derived from a differential pair of node voltages associated with the functional circuit. The counter generates the digital count based on the differential pair of amplified signals. The differential pair of feedback currents is controlled such that the magnitude difference between the differential pair of detection currents and the differential pair of feedback currents is within a tolerance limit. A power associated with the functional circuit is calibrated and monitored based on the digital count.

公开(公告)号：US11770106B2

公开(公告)日：2023-09-26

申请号：US17230841

申请日：2021-04-14

申请人： Taiwan Semiconductor Manufacturing Co., Ltd.

发明人： Feng-Wei Kuo ,  Kai Xu ,  Robert Bogdan Staszewski

IPC分类号： H03F9/00 ,  H03F1/56 ,  H03F3/45 ,  H03F3/20

CPC分类号： H03F1/565 ,  H03F3/20 ,  H03F3/45 ,  H03F2200/451

摘要： Systems and methods for suppressing and mitigating harmonic distortion in a circuit are disclosed. In one example, a disclosed circuit includes a radio frequency (RF) oscillator and a power amplifier. The RF oscillator is configured to generate an RF signal. The power amplifier is configured to generate an amplified RF signal based on the RF signal. The power amplifier includes a transformer including a primary winding and a secondary winding, and a feedback capacitor electrically coupled to the primary winding and the secondary winding.

公开(公告)号：US11728779B2

公开(公告)日：2023-08-15

申请号：US16745511

申请日：2020-01-17

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Jeffrey A. May ,  Eric J. King ,  Christian Larsen ,  Eric Eklund

IPC分类号： H03F3/04 ,  H03G3/00 ,  H02M3/04 ,  H03F3/20 ,  H03G3/30 ,  H04R3/00

CPC分类号： H03G3/007 ,  H02M3/04 ,  H03F3/20 ,  H03G3/004 ,  H03G3/3005 ,  H03F2200/03 ,  H04R3/00

摘要： A power converter may include an input for receiving an input signal and output for generating an intermediate signal that is a power converted signal from the input signal wherein the intermediate signal is determined based on various parameters of a signal path that utilizes the intermediate signal, wherein the various parameters comprise one or more of the following: a peak output signal of the signal path, energy requested over a period of time by the signal path, available energy from an energy source to the power converter, stored energy at an output of the power converter, and stored energy of a battery for providing electrical energy at the input.

公开(公告)号：US20230253922A1

公开(公告)日：2023-08-10

申请号：US17668458

申请日：2022-02-10

申请人： Qorvo US, Inc.

发明人： Nadim Khlat

IPC分类号： H03F1/02 ,  H03F3/189 ,  H03F3/20

CPC分类号： H03F1/02 ,  H03F3/189 ,  H03F3/20 ,  H03F2200/102 ,  H03F2200/451

摘要： A wide bandwidth power amplifier apparatus is provided. The wide bandwidth power amplifier apparatus includes a power amplifier circuit, a primary switcher circuit, a voltage circuit(s), and an auxiliary switcher circuit(s). The power amplifier circuit is configured to amplify a radio frequency (RF) signal based on a modulated voltage and a modulated current. The voltage circuit is configured to generate the modulated voltage and a respective part of the modulated current. The primary switcher circuit and the auxiliary switcher circuit are each configured to also generate a respective part of the modulated current. The auxiliary switcher circuit only generates the respective part of the modulated current when a bandwidth of the modulated voltage exceeds a bandwidth threshold. As such, it is possible to prevent the voltage circuit from having to source additional current when the modulated voltage exceeds the bandwidth threshold, thus helping to improve efficiency of the voltage circuit.

公开(公告)号：US11705887B2

公开(公告)日：2023-07-18

申请号：US17380104

申请日：2021-07-20

申请人： SKYWORKS SOLUTIONS, INC.

发明人： David Steven Ripley

IPC分类号： H03H11/28 ,  H03F3/45 ,  H03F1/56 ,  H03F3/20 ,  H01P5/18

CPC分类号： H03H11/28 ,  H01P5/184 ,  H03F1/56 ,  H03F3/20 ,  H03F3/45 ,  H03F2200/387 ,  H03F2200/451 ,  H03F2200/456 ,  H03F2200/471

摘要： Systems and methods for a tunable impedance are provided. A tunable impedance includes a transistor assembly having two terminals and a control input. The transistor assembly includes one or more transistors electrically connected between the two terminals to provide a first impedance between the two terminals, based upon a control signal. One or more replica transistors react to the control signal in a similar fashion as the transistor assembly, to provide a replica impedance based upon the control signal. A control circuit is configured to generate the control signal based upon a voltage across the replica transistor(s) and/or a current through the replica transistor(s).

公开(公告)号：US20230133510A1

公开(公告)日：2023-05-04

申请号：US18091423

申请日：2022-12-30

申请人： Murata Manufacturing Co., Ltd.

发明人： Satoshi GOTO ,  Kazuhito NAKAI

IPC分类号： H01L25/16 ,  H01L23/538 ,  H01L23/498 ,  H03F3/20 ,  H04B1/40 ,  H03F1/02

摘要： A radio-frequency module including a module substrate having a first main surface and a second main surface on opposite sides; a low-noise amplifier disposed on the second main surface; and a power amplifier circuit in a Doherty configuration. The power amplifier including a first phase circuit; a second phase circuit; a carrier amplifier disposed on the first main surface and including an input terminal connected to a first end of the first phase circuit and an output terminal connected to a first end of the second phase circuit; and a peaking amplifier disposed on the first main surface and including an input terminal connected to a second end of the first phase circuit and an output terminal connected to a second end of the second phase circuit.

公开(公告)号：US20230071628A1

公开(公告)日：2023-03-09

申请号：US17748746

申请日：2022-05-19

申请人： SAMSUNG ELECTRONICS., LTD.

发明人： Byungwoo Koo ,  Sangpil Nam ,  Sunghan Do ,  Junsang Park ,  Jungho Lee ,  Youngjae Cho ,  Michael Choi

IPC分类号： H03M1/66 ,  H03F3/20 ,  H04B1/00

摘要： An apparatus configured to transmit and receive a radio frequency (RF) signal is provided. The apparatus includes a digital-to-analog converter (DAC) configured to convert a digital signal into an analog signal, a power amplifier configured to amplify the analog signal, and an antenna configured to output, as the RF signal, the amplified analog signal to the outside. The DAC includes a current cell matrix including a plurality of current cells configured to generate the analog signal, a plurality of normal paths configured to control the plurality of current cells to be turned on or off, based on the digital signal, and a plurality of alternative paths configured to selectively consume power, based on a pattern of the digital signal.

公开(公告)号：US11552599B2

公开(公告)日：2023-01-10

申请号：US16327483

申请日：2016-08-22

申请人： CHINA COMMUNICATION MICROELECTRONICS TECHNOLOGY CO., LTD. ,  CHINA COMMUNICATION TECHNOLOGY CO., LTD.

发明人： Shoukui Zhu ,  Qing Ding ,  Guangsheng Wu ,  Jianguo Ma

IPC分类号： H03F3/191 ,  H03F1/56 ,  H03F3/20 ,  G06F30/36 ,  H03F1/02 ,  H03F3/217

摘要： Embodiments of the present disclosure include a harmonic power amplifying circuit with high efficiency and high bandwidth and a radio-frequency power amplifier. The circuit comprises an input matching network (11), a transistor (M), and an output matching network (12); a gate of the transistor (M) connected to an output end of the input matching network (11), a drain thereof connected to an input end of the output matching network (12), and a source thereof being grounded; wherein the output matching network (12) enables a lower sideband of the harmonic power amplifying circuit to work in a continuous inverse F amplification mode and an upper sideband of the harmonic power amplifying circuit to work in a continuous F amplification mode; wherein the output matching network (12) and a parasitic network of the transistor (M) form a low pass filter. By transitioning from the continuous inverse F power amplifier working mode to the continuous F power amplifier working mode, the efficiency of a continuous harmonic control power amplifier is effectively improved to be higher than 60%, a relative bandwidth is improved to be higher than 80%, and the harmonic impedance is simple to match and easy to realize.

公开(公告)号：US11536749B2

公开(公告)日：2022-12-27

申请号：US17154758

申请日：2021-01-21

申请人： QUALCOMM Incorporated

发明人： Ramkumar Sivakumar ,  Jingxue Lu ,  Sherif Galal ,  Xinwang Zhang ,  Kshitij Yadav

IPC分类号： H03F3/20 ,  H03F1/00 ,  H04R3/00 ,  G01R19/00 ,  H03F3/217 ,  H03F1/02

摘要： Certain aspects of the present disclosure are generally directed to circuitry and techniques for voltage-to-current conversion. For example, certain aspects provide a circuit for signal amplification including a first amplifier; a first transistor, a gate of the first transistor being coupled to an output of the first amplifier and a drain of the first transistor being coupled to an output node of circuit; a first resistive element coupled between a first input node of the circuit and an input of the first amplifier; a second amplifier; a second transistor, a gate of the second transistor being coupled to an output of the second amplifier and a drain of the second transistor being coupled to the output node of circuit; and a second resistive element coupled between a second input node of the circuit and an input of the second amplifier.