公开(公告)号：US20140045441A1

公开(公告)日：2014-02-13

申请号：US13570295

申请日：2012-08-09

申请人： Shou-Fang Chen

发明人： Shou-Fang Chen

IPC分类号： H04B1/44

CPC分类号： H04B1/525

摘要： A transceiver for radio-frequency identification (RFID) is provided. The transceiver includes a transmitter, a receiver and a noise canceller. The transmitter transmits a carrier signal to an antenna. The receiver receives a wireless signal from the antenna. The noise canceller generates a feedback current according to a part of the carrier signal, and feeds the feedback current to an input of the receiver to cancel noises in the wireless signal. Further, the noise canceller adjusts the feedback current according to the signal strength of the noises in the wireless signal.

摘要翻译： 提供了一种用于射频识别（RFID）的收发器。 收发器包括发射器，接收器和噪声消除器。 发射机向天线发送载波信号。 接收机从天线接收无线信号。 噪声消除器根据载波信号的一部分产生反馈电流，并将反馈电流馈送到接收机的输入端以消除无线信号中的噪声。 此外，噪声消除器根据无线信号中的噪声的信号强度来调节反馈电流。

公开(公告)号：US20130176077A1

公开(公告)日：2013-07-11

申请号：US13346921

申请日：2012-01-10

申请人： Hung-Chuan Pai ,  Shou-Fang Chen

发明人： Hung-Chuan Pai ,  Shou-Fang Chen

IPC分类号： H03G3/20

CPC分类号： H03F1/3205 ,  H03F1/223 ,  H03F3/193 ,  H03F2200/144 ,  H03G1/0029

摘要： An amplifier for wireless receivers and an associated method is provided. The amplifier provides an output signal to an output terminal in response to an input signal received from an input terminal, and further includes a first block and a second block. The first block is coupled between the input terminal and the output terminal, and includes a gain control terminal and a first transistor. The gain control terminal is coupled to a gain control signal, while the gain control signal is provided such that the first transistor is kept operating in a triode region, and a gain of the output signal over the input signal can be seamlessly tuned in response to the gain control signal.

摘要翻译： 提供了一种用于无线接收器的放大器及其相关方法。 放大器响应于从输入端接收的输入信号向输出端提供输出信号，并且还包括第一块和第二块。 第一块耦合在输入端和输出端之间，并包括增益控制端和第一晶体管。 增益控制端子耦合到增益控制信号，而提供增益控制信号使得第一晶体管保持工作在三极管区域中，并且响应于输入信号的输出信号的输出信号的增益可被无缝调谐 增益控制信号。

公开(公告)号：US07944265B2

公开(公告)日：2011-05-17

申请号：US12046527

申请日：2008-03-12

申请人： Christopher Tin Sing Lam ,  Fu Cheng Wang ,  Shou Fang Chen

发明人： Christopher Tin Sing Lam ,  Fu Cheng Wang ,  Shou Fang Chen

IPC分类号： G06F1/04 ,  H03K3/00

CPC分类号： H03L7/22 ,  H03L7/16

摘要： A clock generator includes a delta sigma modulator, a counter and a first phase lock loop. The delta sigma modulator sequentially generates a plurality of variable parameters according to a predetermined value and a first input clock signal. The counter, which is connected to the delta sigma modulator, is used to generate an output clock signal in accordance with a counting value and a second input clock signal. The counting value is relevant to the variable parameters. The first phase lock loop, which is connected to the output of the counter, is used to generate an objective clock signal in accordance with the output clock signal.

摘要翻译： 时钟发生器包括ΔΣ调制器，计数器和第一锁相环。 ΔΣ调制器根据预定值和第一输入时钟信号顺序产生多个可变参数。 连接到Δ-Σ调制器的计数器用于根据计数值和第二输入时钟信号产生输出时钟信号。 计数值与变量参数相关。 连接到计数器的输出的第一锁相环用于根据输出时钟信号产生目标时钟信号。

公开(公告)号：US07837102B2

公开(公告)日：2010-11-23

申请号：US11424234

申请日：2006-06-15

申请人： Chao-Tung Yang ,  Shou-Fang Chen

发明人： Chao-Tung Yang ,  Shou-Fang Chen

IPC分类号： G06K19/06 ,  G06K5/00 ,  G06K7/08

CPC分类号： G06F21/35

摘要： A method and an apparatus utilizing the RFID technology for the login security of a computing device are disclosed. The computing device includes a processing unit, an RFID reader, and a memory. The RFID reader is coupled to the processing unit for communicating with an external RFID tag in which a user data is stored. The memory is coupled to the processing unit for storing a login data. The RFID reader reads the user data from the RFID tag and the processing unit compares the user data with the login data. If the user data matches the login data, the processing unit allows the computing device to be accessed.

摘要翻译： 公开了一种将RFID技术应用于计算设备的登录安全性的方法和装置。 计算设备包括处理单元，RFID读取器和存储器。 RFID读取器耦合到处理单元，用于与存储用户数据的外部RFID标签进行通信。 存储器耦合到处理单元以存储登录数据。 RFID读取器从RFID标签读取用户数据，并且处理单元将用户数据与登录数据进行比较。 如果用户数据与登录数据匹配，则处理单元允许访问计算设备。

公开(公告)号：US20080036506A1

公开(公告)日：2008-02-14

申请号：US11836206

申请日：2007-08-09

申请人： Tin-Sing Lam ,  Chao-Tung Yang ,  Heng-Chih Lin ,  Shou-Fang Chen ,  Sining Zhou

发明人： Tin-Sing Lam ,  Chao-Tung Yang ,  Heng-Chih Lin ,  Shou-Fang Chen ,  Sining Zhou

IPC分类号： G01R23/02

CPC分类号： G06F1/08 ,  H03L7/099

摘要： A frequency switching method is used to make switching among a plurality of frequency signal sources each providing a specific frequency range covering multiple bands. The method includes steps of providing a target frequency data; selecting one of the frequency signal sources to output a first clock signal; generating a first frequency data according to the clock signal of the first frequency to compare with the target frequency data; outputting a second clock signal with the highest band of another one of the frequency signal sources possessing a frequency range higher than that of the selected frequency signal source when the target frequency data is greater than the first frequency data; and outputting the second clock signal with the lowest band of the selected frequency signal source when the target frequency data is smaller than the first frequency data.

摘要翻译： 频率切换方法用于在多个频率信号源之间进行切换，每个频率信号源提供覆盖多个频带的特定频率范围。 该方法包括提供目标频率数据的步骤; 选择频率信号源之一以输出第一时钟信号; 根据所述第一频率的时钟信号产生第一频率数据，以与所述目标频率数据进行比较; 当所述目标频率数据大于所述第一频率数据时，输出具有所述频率信号源中的另一个的最高频带的第二时钟信号，所述频率信号源具有高于所选择的频率信号源的频率范围的频率范围; 以及当所述目标频率数据小于所述第一频率数据时，将所述第二时钟信号输出到所选频率信号源的最低频带。

公开(公告)号：US07548120B2

公开(公告)日：2009-06-16

申请号：US11836206

申请日：2007-08-09

申请人： Tin-Sing Lam ,  Chao-Tung Yang ,  Heng-Chih Lin ,  Shou-Fang Chen ,  Sining Zhou

发明人： Tin-Sing Lam ,  Chao-Tung Yang ,  Heng-Chih Lin ,  Shou-Fang Chen ,  Sining Zhou

IPC分类号： H03L7/00

CPC分类号： G06F1/08 ,  H03L7/099

摘要： A frequency switching method is used to make switching among a plurality of frequency signal sources each providing a specific frequency range covering multiple bands. The method includes steps of providing a target frequency data; selecting one of the frequency signal sources to output a first clock signal; generating a first frequency data according to the clock signal of the first frequency to compare with the target frequency data; outputting a second clock signal with the highest band of another one of the frequency signal sources possessing a frequency range higher than that of the selected frequency signal source when the target frequency data is greater than the first frequency data; and outputting the second clock signal with the lowest band of the selected frequency signal source when the target frequency data is smaller than the first frequency data.

摘要翻译： 频率切换方法用于在多个频率信号源之间进行切换，每个频率信号源提供覆盖多个频带的特定频率范围。 该方法包括提供目标频率数据的步骤; 选择频率信号源之一以输出第一时钟信号; 根据所述第一频率的时钟信号产生第一频率数据，以与所述目标频率数据进行比较; 当所述目标频率数据大于所述第一频率数据时，输出具有所述频率信号源中的另一个的最高频带的第二时钟信号，所述频率信号源具有高于所选择的频率信号源的频率范围的频率范围; 以及当所述目标频率数据小于所述第一频率数据时，将所述第二时钟信号输出到所选频率信号源的最低频带。

公开(公告)号：US20080317300A1

公开(公告)日：2008-12-25

申请号：US12143067

申请日：2008-06-20

申请人： Hung-Chuan Pai ,  Shou-Fang Chen ,  Chao-Tung Yang

发明人： Hung-Chuan Pai ,  Shou-Fang Chen ,  Chao-Tung Yang

IPC分类号： G06K9/00

CPC分类号： G06K9/0002

摘要： A fingerprint sensing circuit for detecting a fingerprint of a user, including a signal source, at least a sensing unit, a resistor, an electrode, and a detecting circuit. The signal source provides a reference signal. The electrode is coupled to a reference level. The sensing unit generates a sensed value according to the electrode and the fingerprint of the user. The resistor is coupled between the signal source and the output node. The detecting circuit is coupled to the output node. The resistor, the sensing unit, and the electrode constitute a filter circuit to the signal source. At least a first signal is generated to the output node according to the reference signal and the sensed value, and the detecting circuit detects the first signal to generate a corresponding detected result indicative of the fingerprint.

摘要翻译： 一种指纹感测电路，用于检测用户的指纹，包括信号源，至少一个感测单元，电阻器，电极和检测电路。 信号源提供参考信号。 电极耦合到参考电平。 感测单元根据用户的电极和指纹产生感测值。 电阻耦合在信号源和输出节点之间。 检测电路耦合到输出节点。 电阻器，感测单元和电极构成信号源的滤波电路。 至少第一信号根据参考信号和感测值产生到输出节点，并且检测电路检测第一信号以产生指示指纹的相应检测结果。

公开(公告)号：US20070290036A1

公开(公告)日：2007-12-20

申请号：US11424234

申请日：2006-06-15

申请人： Chao-Tung Yang ,  Shou-Fang Chen

发明人： Chao-Tung Yang ,  Shou-Fang Chen

IPC分类号： G06K5/00 ,  H04L9/32

CPC分类号： G06F21/35

摘要： A method and an apparatus utilizing the RFID technology for the login security of a computing device are disclosed. The computing device includes a processing unit, an RFID reader, and a memory. The RFID reader is coupled to the processing unit for communicating with an external RFID tag in which a user data is stored. The memory is coupled to the processing unit for storing a login data. The RFID reader reads the user data from the RFID tag and the processing unit compares the user data with the login data. If the user data matches the login data, the processing unit allows the computing device to be accessed.

摘要翻译： 公开了一种将RFID技术应用于计算设备的登录安全性的方法和装置。 计算设备包括处理单元，RFID读取器和存储器。 RFID读取器耦合到处理单元，用于与存储用户数据的外部RFID标签进行通信。 存储器耦合到处理单元以存储登录数据。 RFID读取器从RFID标签读取用户数据，并且处理单元将用户数据与登录数据进行比较。 如果用户数据与登录数据匹配，则处理单元允许访问计算设备。

公开(公告)号：US08977224B2

公开(公告)日：2015-03-10

申请号：US13570295

申请日：2012-08-09

申请人： Shou-Fang Chen

发明人： Shou-Fang Chen

IPC分类号： H04B5/00

CPC分类号： H04B1/525

摘要： A transceiver for radio-frequency identification (RFID) is provided. The transceiver includes a transmitter, a receiver and a noise canceller. The transmitter transmits a carrier signal to an antenna. The receiver receives a wireless signal from the antenna. The noise canceller generates a feedback current according to a part of the carrier signal, and feeds the feedback current to an input of the receiver to cancel noises in the wireless signal. Further, the noise canceller adjusts the feedback current according to the signal strength of the noises in the wireless signal.

摘要翻译： 提供了一种用于射频识别（RFID）的收发器。 收发器包括发射器，接收器和噪声消除器。 发射机向天线发送载波信号。 接收机从天线接收无线信号。 噪声消除器根据载波信号的一部分产生反馈电流，并将反馈电流馈送到接收机的输入端以消除无线信号中的噪声。 此外，噪声消除器根据无线信号中的噪声的信号强度来调节反馈电流。

公开(公告)号：US08665027B2

公开(公告)日：2014-03-04

申请号：US13346921

申请日：2012-01-10

申请人： Hung-Chuan Pai ,  Shou-Fang Chen

发明人： Hung-Chuan Pai ,  Shou-Fang Chen

IPC分类号： H03G3/10

CPC分类号： H03F1/3205 ,  H03F1/223 ,  H03F3/193 ,  H03F2200/144 ,  H03G1/0029

摘要： An amplifier for wireless receivers and an associated method is provided. The amplifier provides an output signal to an output terminal in response to an input signal received from an input terminal, and further includes a first block and a second block. The first block is coupled between the input terminal and the output terminal, and includes a gain control terminal and a first transistor. The gain control terminal is coupled to a gain control signal, while the gain control signal is provided such that the first transistor is kept operating in a triode region, and a gain of the output signal over the input signal can be seamlessly tuned in response to the gain control signal.

摘要翻译： 提供了一种用于无线接收器的放大器及其相关方法。 放大器响应于从输入端接收的输入信号向输出端提供输出信号，并且还包括第一块和第二块。 第一块耦合在输入端和输出端之间，并包括增益控制端和第一晶体管。 增益控制端子耦合到增益控制信号，而提供增益控制信号使得第一晶体管保持工作在三极管区域中，并且响应于输入信号的输出信号的输出信号的增益可被无缝调谐 增益控制信号。