公开(公告)号：US20100158266A1

公开(公告)日：2010-06-24

申请号：US12343807

申请日：2008-12-24

Applicant: Li-Te Wu ,  Cheng-Feng Shih

Inventor： Li-Te Wu ,  Cheng-Feng Shih

IPC: H04B3/00

CPC classification number: H04S1/007

Abstract: A multi-channel audio playback apparatus including a channel interface, a first switching amplifier and a second switching amplifier is provided. The channel interface is used to receive multi-channel digital data and generate first channel digital data and second channel digital data. The first switching amplifier is used to convert the first channel digital data into a first pulse width modulation (PWM) signal according to a first reference signal with a first frequency. The second switching amplifier is used to convert the second channel digital data into a second PWM signal according to a second reference signal with a second frequency. The second frequency is different from the first frequency.

Abstract translation: 提供了包括通道接口，第一开关放大器和第二开关放大器的多声道音频播放设备。 通道接口用于接收多通道数字数据并生成第一通道数字数据和第二通道数字数据。 第一开关放大器用于根据具有第一频率的第一参考信号将第一通道数字数据转换成第一脉宽调制（PWM）信号。 第二开关放大器用于根据具有第二频率的第二参考信号将第二通道数字数据转换为第二PWM信号。 第二频率与第一频率不同。

公开(公告)号：US08537546B2

公开(公告)日：2013-09-17

申请号：US13227612

申请日：2011-09-08

Applicant: Cheng-Feng Shih

Inventor： Cheng-Feng Shih

IPC: G06F1/16

CPC classification number: F16M13/027 ,  A47B91/00 ,  F16M13/02 ,  F16M13/022 ,  H05K5/0234

Abstract: A housing includes a cover, a plurality of foot pads and a plurality of couplers. Each of the plurality of foot pads is fixed on a corresponding one of the couplers and each of the couplers is pivotable about the cover. The cover defines a plurality of first receiving portions and a plurality of second receiving portions for receiving the plurality of couplers and the plurality of foot pads. Each of the plurality of foot pads and each of the plurality of couplers rotates relative to the cover to selectively receive the foot pad and the coupler in the first receiving portion and in the second receiving portion, so as to suspend the housing from a wall and to place the housing on a supporting surface.

Abstract translation: 壳体包括盖，多个脚垫和多个耦合器。 多个脚垫中的每一个固定在相应的一个耦合器上，并且每个耦合器可围绕盖枢转。 盖子限定多个第一接收部分和多个用于接收多个耦合器和多个脚垫的第二接收部分。 多个脚垫中的每一个和多个耦合器中的每一个耦合器相对于盖旋转，以在第一接收部分和第二接收部分中选择性地接收脚垫和耦合器，从而将壳体悬挂在壁上， 以将壳体放置在支撑表面上。

公开(公告)号：US07952436B2

公开(公告)日：2011-05-31

申请号：US12489637

申请日：2009-06-23

Applicant: Li-Te Wu ,  Cheng-Feng Shih

Inventor： Li-Te Wu ,  Cheng-Feng Shih

IPC: H03L7/00

CPC classification number: H03L7/0898 ,  H03L7/18 ,  H03L2207/04

Abstract: A phase lock loop (PLL) circuit is provided. A voltage controlled oscillator (VCO) generates an output clock signal based on a control voltage. A controller provides a first digital control word, a second digital control word and a loop factor. A frequency modifier is coupled to the output clock signal, controlled by the controller to divide the output clock signal by the loop factor to generate a feedback frequency. A charge pump is controlled by the up signal and down signal to generate a charge pump current, comprising a first digital to analog converter (DAC) to generate a first current based on the first digital control word when the up signal is asserted. A second DAC generates a second current based on a second digital control word when the down signal is asserted. The controller defines a first relationship between the first digital control word and the loop factor, and the controller defines a second relationship between the second digital control word and the loop factor.

Abstract translation: 提供了锁相环（PLL）电路。 压控振荡器（VCO）基于控制电压产生输出时钟信号。 控制器提供第一数字控制字，第二数字控制字和循环因子。 频率调节器耦合到输出时钟信号，由控制器控制，以将输出时钟信号除以环路因子以产生反馈频率。 电荷泵由上升信号和下降信号控制以产生电荷泵电流，包括第一数模转换器（DAC），以在上升信号被断言时基于第一数字控制字产生第一电流。 当下降信号被断言时，第二DAC基于第二数字控制字产生第二电流。 控制器定义第一数字控制字和环路因子之间的第一关系，并且控制器定义第二数字控制字和环路因子之间的第二关系。

公开(公告)号：US08792251B2

公开(公告)日：2014-07-29

申请号：US13223260

申请日：2011-08-31

Applicant: Cheng-Feng Shih

Inventor： Cheng-Feng Shih

IPC: H05K7/02

CPC classification number: F16M13/02 ,  F16M2200/02 ,  H05K5/0204

Abstract: An electronic device includes an enclosure and a locking assembly. The locking assembly includes a fixing sleeve including a fixing end hermetically fixed to the enclosure, and an opening end away from the enclosure, and a locking bracket. The locking bracket is attached to the fixing sleeve and defines a through hole defining a passing portion and at least one locking portion communicating with each other. The electronic device is position to a fastener by the fastener passing through the passing portion and being positioned in the locking portion of the through hole.

Abstract translation: 电子设备包括外壳和锁定组件。 锁定组件包括固定套筒，其包括密封地固定到外壳的固定端和远离外壳的开口端以及锁定支架。 锁定支架附接到固定套筒并且限定一通孔，该通孔限定通过部分和至少一个彼此连通的锁定部分。 电子设备通过紧固件定位在紧固件上，穿过通过部分并且定位在通孔的锁定部分中。

公开(公告)号：US08111099B2

公开(公告)日：2012-02-07

申请号：US12343807

申请日：2008-12-24

Applicant: Li-Te Wu ,  Cheng-Feng Shih

Inventor： Li-Te Wu ,  Cheng-Feng Shih

IPC: H03F3/38 ,  H04R5/00

CPC classification number: H04S1/007

Abstract: A multi-channel audio playback apparatus including a channel interface, a first switching amplifier and a second switching amplifier is provided. The channel interface is used to receive multi-channel digital data and generate first channel digital data and second channel digital data. The first switching amplifier is used to convert the first channel digital data into a first pulse width modulation (PWM) signal according to a first reference signal with a first frequency. The second switching amplifier is used to convert the second channel digital data into a second PWM signal according to a second reference signal with a second frequency. The second frequency is different from the first frequency.

Abstract translation: 提供了包括通道接口，第一开关放大器和第二开关放大器的多声道音频播放设备。 通道接口用于接收多通道数字数据并生成第一通道数字数据和第二通道数字数据。 第一开关放大器用于根据具有第一频率的第一参考信号将第一通道数字数据转换成第一脉宽调制（PWM）信号。 第二开关放大器用于根据具有第二频率的第二参考信号将第二通道数字数据转换为第二PWM信号。 第二频率与第一频率不同。

公开(公告)号：US20110026731A1

公开(公告)日：2011-02-03

申请号：US12510457

申请日：2009-07-28

Applicant: Li-Te Wu ,  Cheng-Feng Shih

Inventor： Li-Te Wu ,  Cheng-Feng Shih

IPC: H04R3/00

CPC classification number: H04R3/00

Abstract: The invention provides a microphone circuit. In one embodiment, the microphone circuit comprises a transducer, a biasing resistor, a pre-amplifier, and a switch circuit. The transducer is coupled between a ground and a first node for converting a sound into a voltage signal output to the first node. The biasing resistor is coupled between the ground and the first node. The pre-amplifier is biased with a biasing voltage and coupled between the first node and a second node, and amplifies the voltage signal to obtain an output signal at the second node. The switch circuit is coupled between the first node and the ground, couples the first node to the ground when the microphone circuit is reset, and decouples the first node from the ground after a voltage status of the microphone circuit is stable, thus clamping a voltage of the first node to the ground to prevent generation of a popping noise when the microphone circuit is reset.

Abstract translation: 本发明提供一种麦克风电路。 在一个实施例中，麦克风电路包括换能器，偏置电阻器，前置放大器和开关电路。 换能器耦合在接地和第一节点之间，用于将声音转换成输出到第一节点的电压信号。 偏置电阻耦合在地和第一节点之间。 前置放大器被偏置电压偏置并且耦合在第一节点和第二节点之间，并且放大电压信号以在第二节点处获得输出信号。 开关电路耦合在第一节点和地之间，当麦克风电路复位时将第一节点耦合到地面，并且在麦克风电路的电压状态稳定之后将第一节点与地离开，从而钳位电压 的第一个节点到地面，以防止麦克风电路复位时产生爆裂噪声。

公开(公告)号：US08270635B2

公开(公告)日：2012-09-18

申请号：US12510457

申请日：2009-07-28

Applicant: Li-Te Wu ,  Cheng-Feng Shih

Inventor： Li-Te Wu ,  Cheng-Feng Shih

IPC: H04B15/00

CPC classification number: H04R3/00

Abstract: The invention provides a microphone circuit. In one embodiment, the microphone circuit comprises a transducer, a biasing resistor, a pre-amplifier, and a switch circuit. The transducer is coupled between a ground and a first node for converting a sound into a voltage signal output to the first node. The biasing resistor is coupled between the ground and the first node. The pre-amplifier is biased with a biasing voltage and coupled between the first node and a second node, and amplifies the voltage signal to obtain an output signal at the second node. The switch circuit is coupled between the first node and the ground, couples the first node to the ground when the microphone circuit is reset, and decouples the first node from the ground after a voltage status of the microphone circuit is stable, thus clamping a voltage of the first node to the ground to prevent generation of a popping noise when the microphone circuit is reset.

Abstract translation: 本发明提供一种麦克风电路。 在一个实施例中，麦克风电路包括换能器，偏置电阻器，前置放大器和开关电路。 换能器耦合在接地和第一节点之间，用于将声音转换成输出到第一节点的电压信号。 偏置电阻耦合在地和第一节点之间。 前置放大器被偏置电压偏置并且耦合在第一节点和第二节点之间，并且放大电压信号以在第二节点处获得输出信号。 开关电路耦合在第一节点和地之间，当麦克风电路复位时将第一节点耦合到地面，并且在麦克风电路的电压状态稳定之后将第一节点与地面分离，从而钳位电压 的第一个节点到地面，以防止麦克风电路复位时产生爆裂噪声。