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61. 发明授权

US07619551B1 Audio codec, digital device and voice processing method 有权
标题翻译：音频编解码器，数字设备和语音处理方法
公开(公告)号：US07619551B1
公开(公告)日：2009-11-17
申请号：US12181481
申请日：2008-07-29
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： H03M3/00
CPC分类号： H04R3/00 , H04M1/253 , H04M1/6008 , H04M1/6058
摘要： An audio codec is provided, comprising an analog to digital converter (ADC) operable to receive an analog input signal for producing a first digital signal, and a first decimator down samples the first digital signal to generate a first intermediate signal. A second decimator receives a second digital signal from a digital microphone and down sample the second digital signal to generate a second intermediate signal. A multiplexer selects either the first intermediate signal or the second intermediate signal as a selected signal based on a control signal. A third decimator down samples the selected signal to generate a down sampled signal. A data formatter produces a digital output signal based on the down sampled signal.
摘要翻译：提供了一种音频编解码器，包括可操作以接收用于产生第一数字信号的模拟输入信号的模数转换器（ADC），并且第一抽取器向下采样第一数字信号以产生第一中间信号。第二抽取器从数字麦克风接收第二数字信号，并对第二数字信号进行下采样以产生第二中间信号。复用器基于控制信号选择第一中间信号或第二中间信号作为选择的信号。第三抽取器对所选择的信号进行下采样，以生成下采样信号。数据格式化器基于下采样信号产生数字输出信号。

62. 发明申请

US20090116662A1 AUDIO PROCESSING METHOD AND SYSTEM 审中-公开
标题翻译：音频处理方法和系统
公开(公告)号：US20090116662A1
公开(公告)日：2009-05-07
申请号：US11935489
申请日：2007-11-06
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： H04B15/00
CPC分类号： H04R3/007 , H04R19/016 , H04R2225/49 , H04R2499/11
摘要： An audio processing method used in a microphone is provided. Firstly, a sound signal is received. Next, the sound signal is transduced to a first voltage signal. The first voltage signal is interfered with by a second voltage signal resulting from electromagnetic wave penetrating into the microphone. Next, the second voltage signal is filtered out from the interfered first voltage signal. Finally, the filtered first voltage signal is amplified.
摘要翻译：提供了一种在麦克风中使用的音频处理方法。首先，接收到声音信号。接下来，声音信号被转换成第一电压信号。第一电压信号受到电磁波穿透到麦克风中的第二电压信号的干扰。接下来，将第二电压信号从受干扰的第一电压信号中滤出。最后，滤波后的第一电压信号被放大。

63. 发明申请

US20080298607A1 AUDIO INTERFACE DEVICE AND METHOD 审中-公开
标题翻译：音频接口设备和方法
公开(公告)号：US20080298607A1
公开(公告)日：2008-12-04
申请号：US11755043
申请日：2007-05-30
申请人： Li-Te Wu , Wei-Chan Hsu
发明人： Li-Te Wu , Wei-Chan Hsu
IPC分类号： H01R3/00
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。

64. 发明授权

US07259597B2 Low-voltage detection circuit 有权
标题翻译：低压检测电路
公开(公告)号：US07259597B2
公开(公告)日：2007-08-21
申请号：US11165648
申请日：2005-06-23
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： H03K5/22
CPC分类号： G01R19/16542
摘要： A low-voltage detection circuit detects a terminal voltage of a power supply terminal. The low-voltage detection circuit includes a first voltage-dividing circuit, a second voltage-dividing circuit, and a comparator. The second voltage-dividing circuit includes a bias circuit and a metal-oxide-semiconductor (MOS) transistor. The comparator compares and receives a voltage generated by the first voltage-dividing circuit and a voltage generated by the second voltage-dividing circuit to generate a voltage detection signal.
摘要翻译：低电压检测电路检测电源端子的端子电压。低电压检测电路包括第一分压电路，第二分压电路和比较器。第二分压电路包括偏置电路和金属氧化物半导体（MOS）晶体管。比较器比较并接收由第一分压电路产生的电压和由第二分压电路产生的电压，以产生电压检测信号。

65. 发明授权

US07196565B2 DC level wandering cancellation circuit 有权
标题翻译：直流电平漂移消除电路
公开(公告)号：US07196565B2
公开(公告)日：2007-03-27
申请号：US11308883
申请日：2006-05-22
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： H03L5/00
CPC分类号： G06K7/0008 , H03F3/45475 , H03F2200/78
摘要： A DC level wandering cancellation circuit is provided. The DC level wandering cancellation circuit comprises a low pass filter, for receiving an input voltage; a high pass filter coupled to the low pass filter; an amplifier coupled to the high pass filter for receiving a reference voltage and an output signal of the high pass filter; a comparator coupled to the amplifier for receiving an output signal of the amplifier to compare the reference voltage with the output signal of the amplifier; a resistor coupled between outputs of the high pass filter and the amplifier; a control logic coupled to the comparator for receiving a compared result from the comparator; and a switching means coupled between the high pass filter and the output of the amplifier. The switching means is turned on for a predetermined interval by the control logic according to the compared result.
摘要翻译：提供了DC电平漂移消除电路。 DC电平漂移消除电路包括用于接收输入电压的低通滤波器; 耦合到低通滤波器的高通滤波器; 耦合到高通滤波器的放大器，用于接收高通滤波器的参考电压和输出信号; 比较器，耦合到放大器，用于接收放大器的输出信号，以将参考电压与放大器的输出信号进行比较; 耦合在高通滤波器和放大器的输出之间的电阻器; 耦合到比较器的控制逻辑，用于从比较器接收比较结果; 以及耦合在高通滤波器和放大器的输出之间的开关装置。开关装置根据比较结果由控制逻辑开启预定间隔。

66. 发明授权

US07129600B2 Control circuit with multiple power sources 有权
公开(公告)号：US07129600B2
公开(公告)日：2006-10-31
申请号：US10293320
申请日：2002-11-14
申请人： Li-Te Wu , Hsi-Yuan Wang
发明人： Li-Te Wu , Hsi-Yuan Wang
IPC分类号： H02J1/00
CPC分类号： H03K17/693 , G09G3/3611 , G09G2300/0408 , G09G2330/02 , H02J1/08 , H03K3/356113 , Y10T307/696 , Y10T307/724
摘要： The present invention provides a control circuit with multiple power sources, which accepts an output signal from a comparator circuit. This control circuit with multiple power sources contains two components: one is a voltage transferring circuit, which connects to the comparator and accepts the first and the second input voltages to react the controls of respective output signals for generating the first voltage potential and the second voltage potential; another is an output circuit, which connects to the voltage transferring circuit to react the controls of the first voltage potential and the second voltage potential for deciding the correct output from the first input voltage or the second input voltage.

67. 发明申请

US20060022744A1 BIASING CIRCUIT AND VOLTAGE CONTROL OSCILLATOR THEREOF 有权
标题翻译：偏置电路和电压控制振荡器
公开(公告)号：US20060022744A1
公开(公告)日：2006-02-02
申请号：US11162654
申请日：2005-09-19
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： G05F1/10
CPC分类号： H03L1/00 , H03L7/0995
摘要： A biasing circuit and a voltage control oscillator thereof are provided. The biasing circuit comprises a compensation circuit, a delay circuit and a comparison circuit. In the biasing circuit, the compensation circuit compensates a first differential voltage that is generated by the delay circuit so as to stabilize an output of the biasing circuit operated by a low-current or low-frequency. The jitter of the clock frequency that the voltage control oscillator output can be reduced.
摘要翻译：提供偏置电路及其压控振荡器。偏置电路包括补偿电路，延迟电路和比较电路。在偏置电路中，补偿电路补偿由延迟电路产生的第一差分电压，以稳定由低电流或低频操作的偏置电路的输出。可以减小压控振荡器输出的时钟频率抖动。

68. 发明申请

US20050258884A1 [DC LEVEL WANDERING CANCELLATION CIRCUIT] 有权
标题翻译： [直流电平取消电路]
公开(公告)号：US20050258884A1
公开(公告)日：2005-11-24
申请号：US10709606
申请日：2004-05-18
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： G06K7/00 , H03F3/38 , H03F3/45
CPC分类号： G06K7/0008 , H03F3/45475 , H03F2200/78
摘要： A DC level wandering cancellation circuit is provided. The DC level wandering cancellation circuit comprises a low pass filter, for receiving an input voltage; a high pass filter coupled to the low pass filter; an amplifier coupled to the high pass filter for receiving a reference voltage and an output signal of the high pass filter; a comparator coupled to the amplifier for receiving an output signal of the amplifier to compare the reference voltage with the output signal of the amplifier; a resistor coupled between outputs of the high pass filter and the amplifier; a control logic coupled to the comparator for receiving a compared result from the comparator; and a switching means coupled between the high pass filter and the output of the amplifier. The switching means is turned on for a predetermined interval by the control logic according to the compared result.
摘要翻译：提供了DC电平漂移消除电路。 DC电平漂移消除电路包括用于接收输入电压的低通滤波器; 耦合到低通滤波器的高通滤波器; 耦合到高通滤波器的放大器，用于接收高通滤波器的参考电压和输出信号; 比较器，耦合到放大器，用于接收放大器的输出信号，以将参考电压与放大器的输出信号进行比较; 耦合在高通滤波器和放大器的输出之间的电阻器; 耦合到比较器的控制逻辑，用于从比较器接收比较结果; 以及耦合在高通滤波器和放大器的输出之间的开关装置。开关装置根据比较结果由控制逻辑开启预定间隔。

69. 发明授权

US06803808B2 Low power current mirror circuit 失效
公开(公告)号：US06803808B2
公开(公告)日：2004-10-12
申请号：US10671389
申请日：2003-09-24
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： G05F110
CPC分类号： G05F3/262
摘要： A current mirror circuit is provided. The circuit includes a resistor having a first terminal connected to a current source, a first transistor having a substrate electrode connected to a drain electrode thereof, a second transistor having a substrate electrode connected to the substrate electrode of the first transistor, a third transistor having a substrate electrode connected to the substrate electrode of the first transistor, and a fourth transistor having a drain electrode for providing an output current.

70. 发明授权

US06724244B2 Stable current source circuit with compensation circuit 失效
标题翻译：稳定的电流源电路具有补偿电路
公开(公告)号：US06724244B2
公开(公告)日：2004-04-20
申请号：US10227811
申请日：2002-08-27
申请人： Li-Te Wu
发明人： Li-Te Wu
IPC分类号： G05F110
CPC分类号： G05F3/262
摘要： A stable current source circuit with a compensation circuit, comprising: a PMOS current mirror, connected to a power supply so as to output a stable current; an NMOS current mirror, connected to a third bipolar junction transistor and a fourth compensation resistor; a third bipolar junction transistor, the emitter of the third bipolar junction transistor connected to the NMOS current mirror and both of the base and the collector grounded; and a fourth compensation resistor, interconnected between the NMOS current mirror and the compensation circuit. Alternatively, a compensation capacitor can be added so as to obtain better stability.
摘要翻译：一种具有补偿电路的稳定电流源电路，包括：连接到电源以输出稳定电流的PMOS电流镜; 连接到第三双极结晶体管和第四补偿电阻器的NMOS电流镜; 第三双极结晶体管，第三双极结晶体管的发射极连接到NMOS电流镜，基极和集电极都接地; 以及在NMOS电流镜和补偿电路之间互连的第四补偿电阻。或者，可以添加补偿电容器以获得更好的稳定性。

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