公开(公告)号：US11716102B2

公开(公告)日：2023-08-01

申请号：US17464740

申请日：2021-09-02

Applicant: Intel Corporation

Inventor： Antonio Di Giandomenico ,  Vahur Kampus ,  Sergio Walter ,  Alexander Kahl ,  Steffen Trautmann

IPC: H03G3/30 ,  H04B1/00 ,  H03M3/00 ,  H04B1/40 ,  H04W84/12

CPC classification number: H04B1/0067 ,  H03M3/464 ,  H04B1/40 ,  H03G3/3036 ,  H03G2201/103 ,  H04W84/12

Abstract: An energy-efficient implementation of a WiFi transceiver is proposed in this disclosure. The WiFi transceiver comprises a receive chain comprising a variable receive (Rx) filter circuit and a variable Rx analog-to-digital converter (ADC) circuit. The receive chain is configured to receive a receive signal during a receive mode of operation, having a receive bandwidth associated therewith and receive a transmit signal associated with a transmit chain of the transceiver during a transmit mode of operation, having a transmit bandwidth associated therewith. The WiFi transceiver further comprises a control circuit configured to dynamically adapt a bandwidth of the variable Rx filter and the variable Rx ADC in the receive chain to the receive bandwidth or to the transmit bandwidth, based on the mode of operation.

公开(公告)号：US11711061B2

公开(公告)日：2023-07-25

申请号：US17521303

申请日：2021-11-08

Applicant: Biamp Systems, LLC

Inventor： Eugene Goff ,  Ray Dippert ,  Matthew V. Kotvis ,  Samarth Behura

IPC: H04R29/00 ,  H03G5/16 ,  H04R3/04 ,  H04R3/00 ,  H04R5/04 ,  G06F3/16 ,  H04R1/10 ,  H04R1/40 ,  H04S7/00 ,  G10L21/0232 ,  H04R3/12 ,  H04R27/00 ,  G10L21/0208 ,  G10L21/0216

CPC classification number: H03G5/165 ,  G06F3/16 ,  G10L21/0232 ,  H04R1/1083 ,  H04R1/403 ,  H04R1/406 ,  H04R3/005 ,  H04R3/04 ,  H04R3/12 ,  H04R5/04 ,  H04R27/00 ,  H04R29/001 ,  H04R29/002 ,  H04R29/007 ,  H04S7/301 ,  G10L2021/02082 ,  G10L2021/02166 ,  H03G2201/103 ,  H04R2227/001 ,  H04R2227/003 ,  H04R2430/01

Abstract: An example method of operation may include identifying, in a particular room environment, a number of speakers and one or more microphones on a network controlled by a controller and amplifier, providing test signals to play sequentially from each amplifier channel of the amplifier and the speakers, monitoring the test signals from the one or more microphones simultaneously to detect operational speakers and amplifier channels, providing additional test signals to the speakers to determine tuning parameters, detecting the additional test signals at the one or more microphones controlled by the controller, and automatically establishing a background noise level and noise spectrum of the room environment based on the detected additional test signals.

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

IPC: H04B1/04 ,  H03F1/02 ,  H03G3/30 ,  H03F3/24 ,  H04B1/40

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.

公开(公告)号：US20230210426A1

公开(公告)日：2023-07-06

申请号：US17996333

申请日：2021-04-26

Applicant: Paragit Solutions ApS

Inventor： Mohammad FILFIL

IPC: A61B5/25 ,  A61B5/30 ,  H03G3/30

CPC classification number: A61B5/25 ,  A61B5/30 ,  H03G3/3089 ,  A61B2560/0223 ,  H03G2201/103

Abstract: A method and apparatus for measuring a biopotential signal together with impedance changes uses electrodes on a subject’s skin and for compensating for such impedances to increase accuracy and usability of such devices for short-and long-term monitoring of biosignals. The apparatus can include a first terminal for connection to a first electrode, a second terminal for connection to a second electrode, a first circuitry configured for measuring the biopotential signal from the first and the second terminal, a third terminal for connection to the reference skin electrode, a first variable controlled resistance load connected to the first terminal, and a second variable controlled resistance load connected to the second terminal.

公开(公告)号：US20230179161A1

公开(公告)日：2023-06-08

申请号：US17817375

申请日：2022-08-04

Applicant: REALTEK SEMICONDUCTOR CORPORATION

Inventor： CHIEN WEN CHEN ,  YI-CHING LIAO

IPC: H03G3/30 ,  H03F3/45

CPC classification number: H03G3/30 ,  H03F3/45475 ,  H03G2201/103

Abstract: A program gain amplifier includes an operational amplifier and a capacitor array. The capacitor array includes a first, second, and third capacitors selectively coupled to the operational amplifier or ground according to a first, second, and third switches, respectively. The first, second, and third capacitors have a first, second, and third capacitance, respectively. The third capacitance equals a sum of the first and second capacitance. In a first configuration, the first and second switches are operated at a first conductive state, and the third switch is operated at a second conductive state. When converting to a second configuration from the first configuration, the third switch is operated at the first conductive state, and the first and second switches are operated at the second conductive state. The gain being provided to an input signal in the first and second configurations are the same.

公开(公告)号：US20230168282A1

公开(公告)日：2023-06-01

申请号：US17539170

申请日：2021-11-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Tzu-Wei Lin ,  Hung-Kai Chen ,  Feng-Lin Chan

IPC: G01R1/30 ,  H03G3/30

CPC classification number: G01R1/30 ,  H03G3/30 ,  H03G2201/103

Abstract: An analog front-end (AFE) circuit, configured to be coupled to a sensor having a plurality of sensing units, includes a plurality of sensing circuits and a plurality of multiplexers. Each of the plurality of multiplexers is coupled between one of the plurality of sensing units and at least two of the plurality of sensing circuits.

公开(公告)号：US11653150B2

公开(公告)日：2023-05-16

申请号：US17516830

申请日：2021-11-02

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul Lesso ,  Mark James McCloy-Stevens ,  John Bruce Bowlerwell ,  Yanto Suryono ,  Xin Zhao ,  Morgan Timothy Prior

IPC: H04R5/04 ,  H03F3/183 ,  H03G3/30 ,  H04R29/00 ,  H04S1/00 ,  H04R5/02

CPC classification number: H04R5/04 ,  H03F3/183 ,  H03G3/3005 ,  H04R5/02 ,  H04R29/001 ,  H04S1/007 ,  H03G2201/103

Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.

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

IPC: H03F1/08 ,  H03F3/195 ,  H03F1/02 ,  H03G3/30 ,  H04B1/04

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.

公开(公告)号：US20180367879A1

公开(公告)日：2018-12-20

申请号：US16112661

申请日：2018-08-25

Applicant: Shenzhen Sile Technology Co., Ltd.

Inventor： Mingbing ZOU

IPC: H04R1/08 ,  H04R3/04 ,  G10K15/08 ,  G06F3/16 ,  H03G3/30 ,  H02J7/00

CPC classification number: H04R1/08 ,  G06F3/165 ,  G10K15/08 ,  H02J7/0029 ,  H03G3/3005 ,  H03G2201/103 ,  H04R3/04 ,  H04R2410/03 ,  H04R2420/09

Abstract: A wireless music microphone comprises a central processing unit module, a sound source receiving module, a sound source signal processing module, a sound collecting module, a sound signal processing module, a reverberation processing module and a signal transmitting module. The sound source receiving module receives a song transmitted by devices such as a mobile phone and a tablet computer via a wireless network, the sound source signal processing module removes the original sound from the received music and retains the accompaniment according to a user setting; and a user sound, music or accompaniment is polished and mixed by the reverberation processing module, and is then sent to a loudspeaker box by the signal transmitting module via the wireless network. The multifunctional wireless music microphone is applicable to various wireless communication modes; moreover, the song and user's sound can be effectively mixed, amplified and polished.

公开(公告)号：US20180359019A1

公开(公告)日：2018-12-13

申请号：US15921424

申请日：2018-03-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seon-Ho HAN ,  Bon Tae KOO

IPC: H04B7/08 ,  H04B1/16 ,  H03F3/19 ,  H03F3/45 ,  H03D7/14 ,  H03G3/30 ,  H01Q3/42

CPC classification number: H04B7/0897 ,  H01Q3/36 ,  H01Q3/42 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03F3/19 ,  H03F3/211 ,  H03F3/26 ,  H03F3/45076 ,  H03F2200/294 ,  H03F2200/451 ,  H03G3/3036 ,  H03G2201/103 ,  H03G2201/307 ,  H04B1/16

Abstract: Provided is a phase array receiver. A phase array receiver according to an embodiment of the present invention includes a plurality of antennas, a plurality of low-noise amplifiers, a plurality of phase shifters, a plurality of transconductors, and a frequency mixer. A plurality of low-noise amplifiers amplify RF signals received from the plurality of antennas. The plurality of phase shifters adjusts the phase of the RF signals to generate a plurality of RF phase adjustment signals. The plurality of transconductors convert a plurality of RF phase adjustment signals into a plurality of RF current signals based on the gain control signal. The frequency mixer converts a sum of the plurality of RF current signals into a mixed current signal. According to the inventive concept, the linearity of the signal processing may be improved and the area for the implementation of the phase array receiver may be reduced.