公开(公告)号：US20210144020A1

公开(公告)日：2021-05-13

申请号：US17094913

申请日：2020-11-11

Applicant: Airoha Technology Corp.

Inventor： Ming-Yi HSIEH

IPC: H04L12/18 ,  H04L1/08 ,  H04W36/24

Abstract: A wireless audio output device includes a plurality of audio output units, first and second audio output units among the audio output units being set as first and second roles, respectively. The first role is to establish a multicast link with a source device, to receive one or more media packets from the source device on the multicast link, and to perform bidirectional communication with the source device. The second role is to join the multicast link, to receive the one or more media packets from the source device on the multicast link, to perform unidirectional communication with the source device, and to perform unidirectional and/or bidirectional communication with the first role. An extended packet time slot is divided and each of the first role and the second role transmits or receives one or more extended packets during the extended packet time slot.

公开(公告)号：US10362397B2

公开(公告)日：2019-07-23

申请号：US14960544

申请日：2015-12-07

Applicant: AIROHA TECHNOLOGY CORP.

Inventor： Heng-Chih Lin ,  Wen-Sheng Hou ,  Chien-Chen Lin

IPC: H04R5/02 ,  H04R3/00 ,  G10L21/02 ,  H04R5/027 ,  G10L21/0216 ,  G10L21/0208 ,  H04R1/40

Abstract: A voice enhancement method for distributed system is disclosed. In the method of the present invention, a plurality of picking devices are disposed in a space for picking voice signal. The picking devices communicate with each other and have an enhancement operation on the voice information from each picking device to generate an enhanced voice signal.

公开(公告)号：US10236832B1

公开(公告)日：2019-03-19

申请号：US16014053

申请日：2018-06-21

Applicant: Airoha Technology Corp.

Inventor： Jia-An Jheng ,  Yu-Hua Liu ,  Ya-Ling Yang

IPC: H03F1/30 ,  H04R3/00 ,  H03F3/187

Abstract: An audio system includes a reference voltage generation circuit to generate a digital encoding signal and generate an analog reference voltage according to the digital encoding signal, wherein, during a booting procedure and/or a shutdown procedure, the analog reference voltage is smoothly increased and/or decreased at a smooth rate related to a bit number of the digital encoding signal; a first analog operational amplifier for receiving the analog reference voltage to generate a common voltage, which is smoothly increased and/or decreased during the booting procedure and/or the shutdown procedure; and a differential analog operational amplifier pair, coupled to the first analog operational amplifier, for receiving a differential audio input signal pair and outputting a differential output voltage pair to drive a load, wherein, during the booting procedure and/or the shutdown procedure, the differential audio output signal pair is smoothly increased and/or decreased.

公开(公告)号：US10033085B2

公开(公告)日：2018-07-24

申请号：US15456680

申请日：2017-03-13

Applicant: Airoha Technology Corp.

Inventor： Heng-Chih Lin ,  Chin-Lung Yang

IPC: H03H9/72 ,  H03L7/04 ,  H03D3/08 ,  H04B1/44 ,  H01P7/08 ,  H03B5/32 ,  H03H9/64 ,  H03L7/093 ,  H03L7/099 ,  H03J3/00

Abstract: An acoustic-wave device with active calibration mechanism is provided. The acoustic-wave device with active calibration mechanism includes at least one adjustable acoustic-wave duplexer, a frequency discriminator and a control circuit. The adjustable acoustic-wave duplexer has a first terminal point, a second terminal point and a third terminal point. The adjustable acoustic-wave duplexer includes a TX filter, an RX filter, a first loop switch and a second loop switch. The first loop switch is used for conducting a first loop. The second loop switch is used for conducting a second loop. The control circuit adjusts the operating frequency of the TX filter according to a first loop calibration signal. The control circuit adjusts the operating frequency of the operating frequency of the RX filter according to the second loop calibration signal.

公开(公告)号：US09966920B2

公开(公告)日：2018-05-08

申请号：US15413544

申请日：2017-01-24

Applicant: Airoha Technology Corp.

Inventor： Chun-Hsiung Chang

IPC: H03F3/04 ,  H03G3/30 ,  H03F3/19 ,  H03F3/21 ,  H03F1/02

CPC classification number: H03G3/3042 ,  H03F1/0216 ,  H03F3/19 ,  H03F3/21 ,  H03F2200/405 ,  H03F2200/451 ,  H03F2200/516

Abstract: A power amplifier circuit includes a power supply module and serially connected multi-stages of amplifier circuit. The multi-stages of amplifier circuit, coupled to the power supply module for amplifying an radio frequency (RF) input signal as an RF output signal, which include a driver stage of circuit and a gain stage of circuit. The driver stage of circuit receives and amplifies the RF input signal. The driver stage of circuit is powered by a first supply voltage received from the power supply module. The gain stage of circuit amplifies the signal received from previous stage of amplifier circuit and outputs the RF output signal. The gain stage of circuit is powered by a second supply voltage received from the power supply module. When the power amplifier circuit is operated in a back-off region, the first supply voltage is lower than the second supply voltage.

公开(公告)号：US20170331447A1

公开(公告)日：2017-11-16

申请号：US15339964

申请日：2016-11-01

Applicant: Airoha Technology Corp.

Inventor： Chien-Kuang Lee ,  Heng-Chih Lin

IPC: H03H7/40 ,  H04B1/04

Abstract: An impedance detecting and adjusting circuit includes an impedance adjusting unit, a frequency band detection source and a controller. The impedance adjusting unit is disposed in a radio frequency front end device. The radio frequency front end device includes one or more than one transmission port. The frequency band detection source is selectively coupled to the target transmission port of the one or more than one transmission port for transmitting the scan signals having different frequencies to the target transmission port to detect a corresponding operating frequency band of the target transmission port. The controller is coupled to the impedance adjusting unit for adjusting the impedance adjusting unit according to the measured operating frequency band and making the target transmission port achieve impedance matching at least in the operating frequency band thereof.

公开(公告)号：US09817629B2

公开(公告)日：2017-11-14

申请号：US14589119

申请日：2015-01-05

Applicant: AIROHA TECHNOLOGY CORP.

Inventor： Kuen-Rong Hsieh ,  I-Feng Su ,  Jhang-Liang Lin ,  Sheng-Yo Chiu

IPC: G06F17/00 ,  G06F3/16 ,  H04W4/00 ,  G05B15/02 ,  H04N21/4363

CPC classification number: G06F3/165 ,  G05B15/02 ,  H04N21/43637 ,  H04R2227/005 ,  H04R2420/07 ,  H04W4/80

Abstract: An audio synchronization method for Bluetooth speakers is disclosed. The Bluetooth speakers comprise a first Bluetooth speaker and a second Bluetooth speaker transmitting digital audio packets by Bluetooth communication. The method comprises steps of: fetching the sample counts of the first Bluetooth speaker and the second Bluetooth speaker at the first timing; and adjusting the sample rate of the second Bluetooth speaker according to the sample counts of the first Bluetooth speaker and the second Bluetooth speaker. By using the method of the present invention, the sample counts are checked periodically to keep the Bluetooth speakers audio synchronized.

公开(公告)号：US09807546B2

公开(公告)日：2017-10-31

申请号：US14957818

申请日：2015-12-03

Applicant: AIROHA TECHNOLOGY CORP.

Inventor： Yen-Chih Shen

IPC: H04W4/00 ,  G01R33/07 ,  G01R33/038

CPC classification number: H04W4/008 ,  G01R33/0385 ,  G01R33/07 ,  H04W4/80

Abstract: The present invention relates to a magnetic controlled Bluetooth device and more particularly to a magnetic controlled Bluetooth speaker. The magnetic controlled Bluetooth device comprises a magnetic unit and a magnetic sensor. As another magnetic unit approaches the magnetic sensor of the magnetic controlled Bluetooth device, the magnetic sensor varies its output voltage in response to the magnetic field of another magnet. Thus, the magnetic controlled Bluetooth device can be turned on to execute a Bluetooth pairing process. Further, the magnetic unit of the magnetic controlled Bluetooth device can be used to approaches another magnetic sensor of another magnetic controlled Bluetooth device to turn on another magnetic controlled Bluetooth device.

公开(公告)号：US09722658B2

公开(公告)日：2017-08-01

申请号：US15063628

申请日：2016-03-08

Applicant: AIROHA TECHNOLOGY CORP.

Inventor： Heng-Chih Lin ,  Chien-Kuang Lee ,  Jui-Hung Wei ,  Sheng-Fu Yu

IPC: H04B1/00 ,  H04B1/48 ,  H04W24/00 ,  H04B1/56

CPC classification number: H04B1/48 ,  H04B1/56 ,  H04W24/00

Abstract: The present invention relates to a control method of an RF switch module. The RF switch module comprises a control device and a switch device. The control device is electrically connected to the switch device, and the control device is able to provide a control voltage to the switch device, and turn on or turn off the switch device. Further, the control device determines frequency or voltage value of the control voltage provided to the switch device according to the power or frequency of an RF signal transmitted by the switch device.

公开(公告)号：US20170207757A1

公开(公告)日：2017-07-20

申请号：US15405465

申请日：2017-01-13

Applicant: Airoha Technology Corp.

Inventor： Yu-Hsuan Kang

IPC: H03F3/00 ,  H03F3/45

CPC classification number: H03F3/005 ,  H03F3/45475 ,  H03F2203/45116 ,  H03F2203/45514 ,  H03F2203/45551

Abstract: A switched-capacitor circuit is provided in the present disclosure. The switched-capacitor circuit includes a first capacitor, a first switch, an amplifier circuit, a second switch, and a second capacitor. The first capacitor includes a first end and a second end. The first switch is coupled between an input end and the first end of the first capacitor. The amplifier circuit includes a first input end, a second input end and an output end. The second switch is coupled between the second end of the first capacitor and the first input end of the amplifier circuit. The second capacitor is coupled between the first capacitor and a ground end. Wherein in a first cycle, the first switch is turned on and the second switch is turned off. And in a second cycle, the first switch is turned off and the second switch is turned on.