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公开(公告)号：US12073860B2
公开(公告)日：2024-08-27
申请号：US18191639
申请日：2023-03-28
发明人： Dario Livornesi , Alessio Emanuele Vergani , Paolo Pulici , Francesco Piscitelli , Enrico Mammei , Mojtaba Mohammadi Abdevand , Piero Malcovati , Edoardo Bonizzoni
CPC分类号： G11B5/6029 , G11B5/607 , H03F1/0261
摘要： According to an embodiment, a circuit includes a biasing and a low-frequency recovery circuit. The biasing circuit includes a voltage digital to analog converter (V-DAC), a differential difference amplifier coupled to the V-DAC, a common-mode feedback (CMFB) amplifier coupled to the differential difference amplifier, and a first pair of transistors arranged as a high-impedance structure and coupled to the differential difference amplifier and the CMFB amplifier. The low-frequency recovery circuit includes a current digital to analog converter (C-DAC), a second pair of transistors arranged as a high-impedance structure and coupled to the first pair of transistors, a pair of resistors having a resistance value equal to half a resistance of the resistive sensor, the pair of resistors arranged between the second pair of transistors and coupled to the C-DAC, and a gain circuit coupled to shared nodes between the second pair of transistors and the pair of resistors.
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公开(公告)号：US20240283419A1
公开(公告)日：2024-08-22
申请号：US18170822
申请日：2023-02-17
申请人： Semtech Corporation
CPC分类号： H03G3/3084 , H03F1/0205
摘要： This application describes apparatus and method for transimpedance gain control. A transimpedance amplifier circuit is described with a transimpedance amplifier having an input node for receiving an input current. A variable shunt resistance is connected to the input node and a controller is operable to controllably vary an open-loop transimpedance gain of the transimpedance amplifier and also the resistance of the variable shunt resistance so as to vary a closed-loop transimpedance gain of the transimpedance amplifier.
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公开(公告)号：US20240283415A1
公开(公告)日：2024-08-22
申请号：US18436798
申请日：2024-02-08
发明人： Naoki MORIKAWA
CPC分类号： H03F3/19 , H03F1/0211 , H04B1/0053 , H03F2200/294 , H03F2200/451
摘要： A radio-frequency circuit includes a low-noise amplifier circuit, a switching circuit coupled to the input end of the low-noise amplifier circuit, a switching circuit coupled to the output end of the low-noise amplifier circuit or to the input end of the low-noise amplifier circuit via the switch circuit, a charge pump circuit configured to supply a control voltage to the switching circuit, and a charge pump circuit configured to supply a control voltage to the switching circuit.
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公开(公告)号：US12068725B2
公开(公告)日：2024-08-20
申请号：US17993498
申请日：2022-11-23
发明人： Duy Nguyen , Albert Kuramshin , Aaron Radomski , Alexander Jurkov , Hangon Kim , Kelvin Lee
CPC分类号： H03F3/245 , H03F1/0227 , H03F1/565 , H03F3/005 , H03F3/195 , H03F2200/318 , H03F2200/421 , H03F2200/451
摘要： A switched capacitor modulator (SCM) includes a RF power amplifier. The RF power amplifier receives a rectified voltage and a RF drive signal and modulates an input signal in accordance with the rectified voltage to generate a RF output signal to an output terminal. A reactance in parallel with the output terminal is configured to vary in response to a control signal to vary an equivalent reactance in parallel with the output terminal. A controller generates the control signal and a commanded phase. The commanded phase controls the RF drive signal. The reactance is at least one of a capacitance or an inductance, and the capacitance or the inductance varies in accordance with the control signal.
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公开(公告)号：US12068721B2
公开(公告)日：2024-08-20
申请号：US17930172
申请日：2022-09-07
IPC分类号： H01L27/02 , H01L27/06 , H01L29/20 , H01L29/205 , H01L29/778 , H01L29/872 , H03F1/02 , H03F1/52 , H03F3/195
CPC分类号： H03F1/523 , H01L27/0288 , H01L27/0629 , H01L29/2003 , H01L29/205 , H01L29/7786 , H01L29/872 , H03F1/0211 , H03F3/195 , H03F2200/06 , H03F2200/294 , H03F2200/426 , H03F2200/451
摘要： Monolithic microwave integrated circuits (MMICs) tolerant to electrical overstress are provided. In certain embodiments, a MMIC includes a signal pad that receives a radio frequency (RF) signal, and an RF circuit coupled to the RF signal pad. The RF circuit includes a transistor layout, an input field-effect transistor (FET) implemented using a first portion of a plurality of gate fingers of the transistor layout, and an embedded protection device electrically connected between a gate and a source of the input FET and implemented using a second portion of the plurality of gate fingers. The MMIC is tolerant to electrical overstress events, such as field-induced charged-device model (FICDM) events.
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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：US20240275335A1
公开(公告)日：2024-08-15
申请号：US18436510
申请日：2024-02-08
发明人： Tilen Svete , Gregoire Montjaux
CPC分类号： H03F1/0233 , H03F3/19 , H03F2200/105 , H03F2200/451
摘要： A method for controlling an envelope shape of an output signal outputted by a driver of a wireless transmitter includes supplying a first voltage level and a second voltage level, generating a filtered envelope reference signal by switching between the first voltage level and the second voltage level, in conjunction with low-pass filtering the transitions between the first voltage level and the second voltage level, generating a driver supply voltage following the filtered envelope reference signal, regulated in a manner adapted to supply the driver, and controlling the envelope shape of the output signal by supplying the driver with the driver supply voltage.
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公开(公告)号：US20240275334A1
公开(公告)日：2024-08-15
申请号：US18646024
申请日：2024-04-25
CPC分类号： H03F1/0227 , H03F3/195 , H03F3/245 , H03F2200/102 , H03F2200/168 , H03F2200/336 , H03F2200/451
摘要： Multi-level envelope tracking systems are disclosed. In certain embodiments, a method of envelope tracking includes amplifying a radio frequency signal using a power amplifier, supplying power to the power amplifier using a power amplifier supply voltage, generating a plurality of delay-controlled regulated voltages based on controlling a delay of a plurality of regulated voltages using a controllable delay circuit, generating a modulator output voltage at a modulator output of a modulator, providing filtering using a first filter coupled between the modulator output and the power amplifier supply voltage, and controlling activation of a plurality of switches of the modulator based on an envelope of the radio frequency signal. The plurality of switches are each coupled between the modulator output and a corresponding one of the plurality of delay-controlled regulated voltages.
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公开(公告)号：US12063018B2
公开(公告)日：2024-08-13
申请号：US17343912
申请日：2021-06-10
申请人： Qorvo US, Inc.
发明人： Nadim Khlat
CPC分类号： H03F3/245 , H03F1/0233 , H03F1/0288 , H03F3/195 , H03F2200/102 , H03F2200/451
摘要： An envelope tracking (ET) integrated circuit (ETIC) operable with multiple types of power amplifiers is provided. The ETIC is configured to provide one or more ET voltages to a power amplifier(s) for amplifying a radio frequency (RF) signal. In embodiments disclosed herein, the ETIC can be configured to generate the ET voltages at same or different voltage levels based on specific types of the power amplifier(s), such as multi-stage power amplifier and Doherty power amplifier, and for a wider modulation bandwidth of the RF signal. As such, the ETIC can be flexibly adapted to enable a variety of power management scenarios and/or topologies.
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公开(公告)号：US12062904B2
公开(公告)日：2024-08-13
申请号：US17496593
申请日：2021-10-07
申请人： DENSO CORPORATION
发明人： Jun Fukuhara
CPC分类号： H02H7/20 , G01R19/0092 , H02H1/0007 , H03F3/45475 , H03F2200/426
摘要： A current sense circuit includes channels a detection terminal, a feedback circuit and third-type switches. The channels respectively have first-type switches and second-type switches. Each of the first-type switches supplies an electric power to a load when the first-type switch is turned on. The second-type switches are respectively connected to the first-type switches in parallel, and respectively detect currents flowing through the first-type switches. The detection terminal is connected to the second-type switches. The feedback circuit includes a single operational amplifier having a first input terminal and a second input terminal. The first input terminal is connected to respective electrodes of the first-type switches close to the load. The second input terminal is connected to respective electrodes of the second-type switches close to the detection terminal. The third-type switches are connected to the electrodes of the first-type switches and the first input terminal.
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