公开(公告)号：US20100322440A1

公开(公告)日：2010-12-23

申请号：US12489695

申请日：2009-06-23

申请人： Jui-Te CHIU ,  Li-Te WU

发明人： Jui-Te CHIU ,  Li-Te WU

IPC分类号： H03F99/00 ,  H04R3/00

CPC分类号： H03F1/26 ,  H03F3/187 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45526 ,  H03F2203/45544

摘要： An audio processing circuit is provided, receiving a microphone signal from a microphone to output a differential signal. A preamplifier receives the microphone signal to output a first preamplified voltage and a second preamplified voltage. A gain stage receives the first preamplified voltage and the second preamplified voltage to output the differential signal comprising a first differential output and a second differential output. In the preamplifier, a first operational amplifier is provided. A first voltage controlled current source is controlled by the output end of the first operational amplifier to provide a first current. A first transistor has a gate coupled to a ground voltage supply, a source coupled to the first voltage controlled current source for receiving the first current, and a drain coupled to a voltage ground. Likewise, a second voltage controlled current source and a second transistor are presented symmetrically to render the differential output.

摘要翻译： 提供一种音频处理电路，从麦克风接收麦克风信号以输出差分信号。 前置放大器接收麦克风信号以输出第一预放大电压和第二预放大电压。 增益级接收第一预放大电压和第二预放大电压，以输出包括第一差分输出和第二差分输出的差分信号。 在前置放大器中，提供第一运算放大器。 第一电压控制电流源由第一运算放大器的输出端控制以提供第一电流。 第一晶体管具有耦合到接地电压源的栅极，耦合到用于接收第一电流的第一压控电流源的源极和耦合到电压接地的漏极。 同样地，对称地呈现第二压控电流源和第二晶体管，以产生差分输出。

公开(公告)号：US20120163634A1

公开(公告)日：2012-06-28

申请号：US13409807

申请日：2012-03-01

申请人： Li-Te WU ,  Wei-Chan HSU

发明人： Li-Te WU ,  Wei-Chan HSU

IPC分类号： H04R3/00

CPC分类号： H01R27/00 ,  H01R24/58 ,  H01R2105/00 ,  H04R2410/00

摘要： The invention provides an audio interface device and method utilizing a single audio jack connector for plugging into a three-wire analog microphone or a three-wire digital microphone, thereby reducing dimensions and production costs thereof and an electronic system using the same. The audio interface comprises an audio jack connector, having first to third contacts electronically connected with the three-wire microphone plugged thereinto; and an audio processing device, detecting a type of the three-wire microphone plugged into the audio jack connector, outputting a clock signal to the three-wire microphone and receiving a digital audio signal from the three-wire microphone when the type is digital; or receiving analog audio signals from the three-wire microphone when the type is analog.

摘要翻译： 本发明提供一种使用单个音频插孔连接器插入三线模拟麦克风或三线数字麦克风的音频接口设备和方法，从而减小其尺寸和生产成本以及使用该音频接口设备的电子系统。 音频接口包括音频插孔连接器，其具有与插入其中的三线麦克风电子连接的第一至第三触点; 以及音频处理装置，检测插入到音频插座连接器中的三线麦克风的类型，当该类型是数字时，向3线麦克风输出时钟信号并从三线麦克风接收数字音频信号; 或在类型为模拟时从三线麦克风接收模拟音频信号。

公开(公告)号：US20100027830A1

公开(公告)日：2010-02-04

申请号：US12181440

申请日：2008-07-29

申请人： Wei-Chan HSU ,  Li-Te WU

发明人： Wei-Chan HSU ,  Li-Te WU

IPC分类号： H04R1/00

CPC分类号： H04R19/005 ,  H04R19/04 ,  H04R2201/003

摘要： An MEMS microphone package includes a circuit board and an MEMS microphone chip. The MEMS microphone chip, mounted on the circuit board, includes a substrate, an MEMS transducer formed on the substrate, and a readout circuit also formed on the substrate. The MEMS transducer generates a sound signal according to sound pressure variations. The readout circuit reads the sound signal from the MEMS transducer.

摘要翻译： MEMS麦克风封装包括电路板和MEMS麦克风芯片。 安装在电路板上的MEMS麦克风芯片包括基板，形成在基板上的MEMS换能器，以及也形成在基板上的读出电路。 MEMS传感器根据声压变化产生声音信号。 读出电路读取来自MEMS换能器的声音信号。

公开(公告)号：US20130214856A1

公开(公告)日：2013-08-22

申请号：US13488834

申请日：2012-06-05

申请人： Li-Te WU

发明人： Li-Te WU

IPC分类号： H03F1/26

CPC分类号： H03F3/217

摘要： The invention further provides a switching amplifier system. In one embodiment, the switching amplifier system comprises a noise shaper, a corrector, and a pulse width logic. The noise shaper receives a first signal, performs a noise shaping process to process the first signal according to a feedback signal to generate a second signal sliced into a plurality of frames. The corrector adds a plurality of correction pulses respectively to the frames of the second signal to obtain a third signal in such a way that the correction pulse added to the second signal in a target frame selected from the frames has a polarity inverse to that of an original waveform of the second signal in the target frame. The pulse width logic then converts the third signal to a pulse width modulation (PWM) signal.

摘要翻译： 本发明还提供一种开关放大器系统。 在一个实施例中，开关放大器系统包括噪声整形器，校正器和脉冲宽度逻辑。 噪声整形器接收第一信号，执行噪声整形处理以根据反馈信号处理第一信号，以产生被分成多个帧的第二信号。 校正器分别向第二信号的帧添加多个校正脉冲，以获得第三信号，使得从帧中选择的目标帧中添加到第二信号的校正脉冲的极性与 目标帧中第二个信号的原始波形。 然后，脉冲宽度逻辑将第三信号转换为脉宽调制（PWM）信号。

公开(公告)号：US20100321119A1

公开(公告)日：2010-12-23

申请号：US12489637

申请日：2009-06-23

申请人： Li-Te WU ,  Cheng-Feng SHIH

发明人： Li-Te WU ,  Cheng-Feng SHIH

IPC分类号： H03L7/08

CPC分类号： H03L7/0898 ,  H03L7/18 ,  H03L2207/04

摘要： 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.

摘要翻译： 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：US20100027813A1

公开(公告)日：2010-02-04

申请号：US12183239

申请日：2008-07-31

申请人： Li-Te WU

发明人： Li-Te WU

IPC分类号： H03F21/00

CPC分类号： H03F3/2173

摘要： A switching audio amplifier adapted in a digital speaking device for driving a speaker is provided. An audio amplification method implemented for the switching audio amplifier is also provided. In the switching audio amplifier, a comparison stage compares an audio input signal with a saw-tooth signal to generate a Pulse Width Modulation (PWM) signal. A driver stage buffers the PWM signal to drive the speaker. A detector detects amplitude of the input signal to generate a control signal, and a saw-tooth generator adjusts a transition rate of the saw-tooth signal based on the control signal.

摘要翻译： 提供了一种适用于用于驱动扬声器的数字语音设备中的开关音频放大器。 还提供了一种为开关音频放大器实现的音频放大方法。 在开关音频放大器中，比较级将音频输入信号与锯齿信号进行比较以产生脉宽调制（PWM）信号。 驱动器级缓冲PWM信号来驱动扬声器。 检测器检测输入信号的幅度以产生控制信号，锯齿发生器基于控制信号调节锯齿信号的转变速率。