公开(公告)号：US20230361791A1

公开(公告)日：2023-11-09

申请号：US17737046

申请日：2022-05-05

Applicant: Airoha Technology Corp.

Inventor： Yu-Hua Liu ,  Shu-Yu Lin

IPC: H04B1/00 ,  H04B1/40 ,  H04K3/00

CPC classification number: H04B1/0057 ,  H04B1/40 ,  H04K3/22

Abstract: A sub-circuit of a reconfigurable wireless receiver includes a down-conversion circuit and a plurality of filters. The down-conversion circuit applies down-conversion to a first signal, and generates and outputs a plurality of second signals each derived from down-converting the first signal. The filters are coupled to the down-conversion circuit, and apply filtering to the second signals for generating a plurality of filter outputs, respectively, wherein the filters includes a first filter and a second filter, and the first filter and the second filter have different filter architecture.

公开(公告)号：US11764728B1

公开(公告)日：2023-09-19

申请号：US17720312

申请日：2022-04-14

Applicant: Airoha Technology Corp.

Inventor： Yu-Hua Liu ,  Yao-Te Chiu

IPC: H03K3/0231 ,  H03B5/24 ,  H03L1/00

CPC classification number: H03B5/24 ,  H03K3/0231 ,  H03L1/00

Abstract: An oscillator includes a first current source, a second current source, a first chopper circuit, a resistive component, a capacitive component, and a processing circuit. The first current source provides a first current. The second current source provides a second current. The first chopper circuit includes a first terminal coupled to the first current source, a second terminal coupled to the second current source, a third terminal coupled to the resistive component, and a fourth terminal coupled to the capacitive component. The processing circuit generates an output clock in response to a first voltage across the resistive component and a second voltage across the capacitive component. The first chopper circuit couples the first terminal and the second terminal to the third terminal and the fourth terminal, respectively and alternately. The resistive component and the capacitive component receive the first current and the second current, respectively and alternately.

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：US11437991B2

公开(公告)日：2022-09-06

申请号：US17313039

申请日：2021-05-06

Applicant: Airoha Technology Corp.

Inventor： Hung-I Chen ,  Yu-Hua Liu

IPC: H03K17/687 ,  H04W52/02

Abstract: A control circuit for a main switch is provided. The control circuit includes an output voltage tracker, a main switch bias generator, and a reference current device. The output voltage tracker is coupled to the main output end and generates a first tracking voltage positively correlated to an output voltage. The main switch bias generator, in response to the first tracking voltage, generates a second tracking voltage substantially equal to the output voltage. The reference current device is coupled to the main switch bias generator and is used to generate a control voltage on a main control end. The reference current device is used to limit the maximum value of the output current. The main switch and a duplicating switching element of the main switch bias generator form a current mirror configuration circuit. The consuming current of the output voltage tracker is positively correlated to the output current.

公开(公告)号：US09288420B2

公开(公告)日：2016-03-15

申请号：US14183661

申请日：2014-02-19

Applicant: AIROHA TECHNOLOGY CORP.

Inventor： Heng-Chih Lin ,  Yu-Hua Liu

IPC: H04N5/455 ,  H04N5/44 ,  H04H40/18

CPC classification number: H04N5/44 ,  H04H40/18 ,  H04H40/27 ,  H04N5/455 ,  H04N21/426 ,  H04N21/42607

Abstract: The present invention provides a digital television signal reception system, comprising a chip having a low-noise amplifier and a master receiver, at least one slave receiver, and at least one local-oscillator leakage processing unit. The chip receives at least one digital input signal of television channel. The low-noise amplifier amplifies and sends the input signal of television channel to the master/slave receiver. The input signal of television channel is frequency-mixed by the master/slave receiver so as to output an output signal of second television channel and an output signal of second television channel. The local-oscillator leakage processing unit detects and removes local-oscillator leakage of the master receiver included in the output signal of second television channel, so as to avoid interference of the local leakage of master receiver on sensitivity of receiving the output signal of second television channel of slave receiver by the slave television.

Abstract translation: 本发明提供一种数字电视信号接收系统，包括具有低噪声放大器和主接收器的芯片，至少一个从接收器和至少一个本地振荡器泄漏处理单元。 芯片接收电视频道的至少一个数字输入信号。 低噪声放大器将电视频道的输入信号放大并发送到主/从接收机。 电视频道的输入信号由主/从接收机频率混合，以输出第二电视频道的输出信号和第二电视频道的输出信号。 本地振荡器泄漏处理单元检测和去除包括在第二电视频道的输出信号中的主接收机的局部振荡器泄漏，以避免主接收机的局部泄漏对接收第二电视机的输出信号的灵敏度的干扰 从机接收机的通道。