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91.发明申请公开(公告)号：US20220272459A1
公开(公告)日：2022-08-25
申请号：US17674203
申请日：2022-02-17
IPC分类号： H04R17/02 , H01L41/083 , H04R7/18 , H04R7/08
摘要： A piezoelectric microelectromechanical system microphone comprises a piezoelectric element configured to deform and generate an electrical potential responsive to impingement of sound waves on the piezoelectric element, a sensing electrode disposed on the piezoelectric element and configured to sense the electrical potential, and a dummy electrode electrically unconnected to the sensing electrode and disposed on a portion of the piezoelectric element that is free of the sensing electrode, the dummy electrode configured to reduce static deformation of the piezoelectric element caused by residual stresses in the piezoelectric element.
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公开(公告)号：US20220271734A1
公开(公告)日：2022-08-25
申请号：US17651300
申请日：2022-02-16
发明人： Benjamin Paul Abbott , Gong Bin Tang , Rei Goto , Keiichi Maki
摘要： An acoustic wave filter includes a piezoelectric layer. A first acoustic wave device includes a portion of the piezoelectric layer and a first multi-layer interdigital transducer electrode disposed over the first portion of the piezoelectric layer. Additional acoustic wave devices are coupled to the first acoustic wave device, the additional acoustic wave devices including a second portion of the piezoelectric layer and a plurality of multi-layer interdigital transducer electrodes disposed over the second portion of the piezoelectric layer. At least one of the plurality of multi-layer interdigital transducer electrodes includes a layer that is thinner than a corresponding layer of the same material of the first multi-layer interdigital transducer electrode of the first acoustic wave device.
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93.发明申请公开(公告)号：US20220267141A1
公开(公告)日：2022-08-25
申请号：US17674213
申请日：2022-02-17
发明人： Guofeng Chen , Yu Hui
摘要： A piezoelectric microelectromechanical system microphone comprises a support substrate, a piezoelectric element configured to deform and generate an electrical potential responsive to impingement of sound waves on the piezoelectric element, the piezoelectric element attached to the support substrate about a portion of a perimeter of the piezoelectric element, a sensing electrode disposed on the piezoelectric element and configured to sense the electrical potential, and slits defined in the piezoelectric element about the perimeter of the piezoelectric element, the slits defining a plurality of partial anchors securing the piezoelectric element to the support substrate to improve sensitivity of the piezoelectric microelectromechanical system microphone.
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94.发明申请公开(公告)号：US20220255567A1
公开(公告)日：2022-08-11
申请号：US17566349
申请日：2021-12-30
摘要： The disclosed front end architectures are configured to conglomerate duplexer transmission (TX) contours into a specific or targeted region. This enables the power amplifier (PA) to match a larger number of frequency bands without the help of additional matching networks. The disclosed architectures are advantageous because they reduce the number of components (e.g., surface mount technology components (SMTs)) required for radio-frequency (RF) modules, such as front end modules, power amplifier modules, and the like. The disclosed architectures are also advantageous because they improve performance of the modules across a wider range of frequency bands.
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公开(公告)号：US20220255524A1
公开(公告)日：2022-08-11
申请号：US17660715
申请日：2022-04-26
发明人： Hai H. Ta , Weimin Sun
摘要： Aspects of this disclosure relate to a band pass filter that includes LC resonant circuits coupled to each other by a capacitor. A bridge capacitor can be in parallel with series capacitors, in which the series capacitors include the capacitor coupled between the LC resonant circuits. The bridge capacitor can create a transmission zero at a frequency below the passband of the band pass filter. The LC resonant circuits can each include a surface mount capacitor and a conductive trace of the substrate, and an integrated passive device die can include the capacitor. Band pass filters disclosed herein can be relatively compact, provide relatively good out-of-band rejection, and relatively low loss.
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公开(公告)号：US20220246824A1
公开(公告)日：2022-08-04
申请号：US17585772
申请日：2022-01-27
IPC分类号： H01L41/047 , H03H3/04 , H03H9/25 , H01L41/27
摘要： An acoustic wave resonator comprises a plurality of interdigital transducer (IDT) electrodes disposed on upper and lower sides of a piezoelectric film, the IDT electrodes on the upper side of the piezoelectric film being offset from the IDT electrodes on the lower side of the piezoelectric film by λ/4, λ being a wavelength of a main acoustic wave generated by the acoustic wave resonator to enable the acoustic wave resonator to generate piston mode acoustic waves responsive to electrical excitation of the plurality of IDT electrodes with an alternating current.
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公开(公告)号：US20220231640A1
公开(公告)日：2022-07-21
申请号：US17562249
申请日：2021-12-27
发明人： Aleksey A. LYALIN
摘要： Power amplifier having analog pre-distortion by adaptive degenerative feedback. In some embodiments, a pre-distortion circuit for an amplifier can include a transistor having an input node for receiving an input signal, an output node for providing an output signal having a gain relative to the input signal, and a common node for coupling to a ground. The pre-distortion circuit can further include a degeneration circuit implemented between the common node and the ground, with the degeneration circuit being configured to introduce a feedback response that reduces the gain when the input signal has a power level at or below a selected level. The degeneration circuit can be further configured to be disabled or provide a reduced feedback response when the input signal has a power level that exceeds the selected level.
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公开(公告)号：US20220224382A1
公开(公告)日：2022-07-14
申请号：US17708764
申请日：2022-03-30
IPC分类号： H04B7/0426 , H04B17/13 , H04B7/06
摘要： Apparatus and methods for beamforming communication systems with power control based on antenna pattern configuration are provided. In certain embodiments, a beamforming communication system includes an antenna array including a plurality of antenna elements. The beamforming communication system further includes a plurality of signal conditioning circuits operatively associated with the antenna elements, and an antenna array management circuit that generates a plurality of control signals that individually control the signal conditioning circuits. The antenna array management circuit achieves a desired level of power control based on generating the control signals to select an antenna pattern configuration associated with a desired power control level.
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公开(公告)号：US20220224292A1
公开(公告)日：2022-07-14
申请号：US17708527
申请日：2022-03-30
摘要： Components of a power amplifier controller may support lower voltages than the power amplifier itself. As a result, a surge protection circuit that prevents a power amplifier from being damaged due to a power surge may not effectively protect the power amplifier controller. Embodiments disclosed herein present an overvoltage protection circuit that prevents a charge-pump from providing a voltage to a power amplifier controller during a detected surge event. By separately detecting and preventing a voltage from being provided to the power amplifier controller during a surge event, the power amplifier controller can be protected regardless of whether the surge event results in a voltage that may damage the power amplifier. Further, embodiments of the overvoltage protection circuit can prevent a surge voltage from being provided to a power amplifier operating in 2G mode.
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公开(公告)号：US11387798B2
公开(公告)日：2022-07-12
申请号：US16995641
申请日：2020-08-17
IPC分类号： H03F3/24 , H03F3/195 , H03K17/693
摘要： Unpowered switching module. A switching module can include a first input terminal, a second input terminal, and an output terminal. The output terminal can be configured to output a radio-frequency (RF) component of an input signal received on the first input terminal or the second input terminal in response to the input signal including a positive direct-current (DC) voltage.
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