公开(公告)号：US07043206B2

公开(公告)日：2006-05-09

申请号：US10280991

申请日：2002-10-25

申请人： Cheryl Herdey ,  Shane Kaiser ,  Hung-Chuan Pai ,  Laurent Perraud ,  Nicolas Sornin ,  Gerald J. Twomey

发明人： Cheryl Herdey ,  Shane Kaiser ,  Hung-Chuan Pai ,  Laurent Perraud ,  Nicolas Sornin ,  Gerald J. Twomey

IPC分类号： H04B1/10 ,  H04B15/00

CPC分类号： H03F3/45977 ,  H04L2027/0016

摘要： An offset correction analogic circuit capable of compensating the offset of a digital baseband is described. The circuit comprises analog means to receive an output differential signal issued from a differential signal path. The differential signal path may be a baseband filter as used in digital communication systems. The baseband filter inputs an input differential signal having an offset to be compensated. The output differential signal is fed into an analog integrator to generate a pulsed signal either on a first output line or on a second output line according to the polarity of the output differential signal. The pulsed signal is then integrated into a switched capacitor and a differential compensation offset signal is issued. The frequency of the pulsed signal is preferably proportional to the voltage value of the output differential signal. The compensation offset signal may be summed with the input differential signal into a summing circuit.

公开(公告)号：US07362252B1

公开(公告)日：2008-04-22

申请号：US11626854

申请日：2007-01-25

申请人： Hung-Chuan Pai

发明人： Hung-Chuan Pai

IPC分类号： H03M3/00

CPC分类号： H03M3/398 ,  H03M3/406 ,  H03M3/43 ,  H03M3/452

摘要： A high order continuous-time Sigma-Delta Modulator (ΣΔM) is used for its high carrier-to-noise ratio (CNR) performance and low power consumption. The modulator is designed to allow zero-IF, wide-band low-pass or low-IF flexibility. The sigma-delta ADC modulator includes a receiving circuit, a plurality of loop filter transconductors, a plurality of feedforward weighting amplifiers, a first adding element, at least a local feedback circuit, a quantizer, and a feedback DAC. The local feedback circuit includes a feedback weighting amplifier and a second adding element. The feedback coefficient of the feedback weighting amplifier is tunable, and the local feedback circuits can be designed to maximize bandwidth combination.

摘要翻译： 高阶连续时间Σ-Δ调制器（SigmaDeltaM）用于其高载波噪声比（CNR）性能和低功耗。 调制器被设计成允许零中频，宽带低通或低IF灵活性。 Σ-ΔADC调制器包括接收电路，多个环路滤波器跨导体，多个前馈加权放大器，第一加法元件，至少局部反馈电路，量化器和反馈DAC。 本地反馈电路包括反馈加权放大器和第二加法元件。 反馈加权放大器的反馈系数是可调谐的，并且可以设计局部反馈电路以最大化带宽组合。

公开(公告)号：US20090033533A1

公开(公告)日：2009-02-05

申请号：US12179556

申请日：2008-07-24

申请人： Hung-Chuan Pai ,  Chao-Tung Yang

发明人： Hung-Chuan Pai ,  Chao-Tung Yang

IPC分类号： H03M3/02

CPC分类号： H03M3/484 ,  H03M3/43 ,  H03M3/49

摘要： A sigma-delta modulator includes a loop filter, a single bit quantizer, a single bit DAC, an adder. The loop filter is for filtering a summed signal to generate a filtered signal. The single bit quantizer is coupled to the loop filter, for performing a quantization process to the filtered signal to generate a quantized signal. The single bit DAC is coupled to the single bit quantizer, has an adjustable configuration, and is for generating a feedback signal according to the quantized signal and the configuration thereof. The adder is coupled to the loop filter and the single bit DAC, for summing an input signal and the feedback signal to generate the summed signal.

摘要翻译： Σ-Δ调制器包括环路滤波器，单比特量化器，单比特DAC，加法器。 环路滤波器用于滤波求和信号以产生滤波信号。 单位量化器耦合到环路滤波器，用于对经滤波的信号执行量化处理以产生量化信号。 单位DAC耦合到单位量化器，具有可调配置，并且用于根据量化信号及其配置产生反馈信号。 加法器耦合到环路滤波器和单位DAC，用于对输入信号和反馈信号求和以产生求和信号。

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：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。

公开(公告)号：US08041083B2

公开(公告)日：2011-10-18

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：US07696914B2

公开(公告)日：2010-04-13

申请号：US12179556

申请日：2008-07-24

申请人： Hung-Chuan Pai ,  Chao-Tung Yang

发明人： Hung-Chuan Pai ,  Chao-Tung Yang

IPC分类号： H03M3/00

CPC分类号： H03M3/484 ,  H03M3/43 ,  H03M3/49

摘要： A sigma-delta modulator includes a loop filter, a single bit quantizer, a single bit DAC, an adder. The loop filter is for filtering a summed signal to generate a filtered signal. The single bit quantizer is coupled to the loop filter, for performing a quantization process to the filtered signal to generate a quantized signal. The single bit DAC is coupled to the single bit quantizer, has an adjustable configuration, and is for generating a feedback signal according to the quantized signal and the configuration thereof. The adder is coupled to the loop filter and the single bit DAC, for summing an input signal and the feedback signal to generate the summed signal.

摘要翻译： Σ-Δ调制器包括环路滤波器，单比特量化器，单比特DAC，加法器。 环路滤波器用于滤波求和信号以产生滤波信号。 单位量化器耦合到环路滤波器，用于对经滤波的信号执行量化处理以产生量化信号。 单位DAC耦合到单位量化器，具有可调配置，并且用于根据量化信号及其配置产生反馈信号。 加法器耦合到环路滤波器和单位DAC，用于对输入信号和反馈信号求和以产生求和信号。

公开(公告)号：US20050118980A1

公开(公告)日：2005-06-02

申请号：US10724415

申请日：2003-12-01

申请人： Hung-Chuan Pai ,  Liang Dai ,  Kevin Wang ,  Jie Huang

发明人： Hung-Chuan Pai ,  Liang Dai ,  Kevin Wang ,  Jie Huang

IPC分类号： H03F1/34 ,  H03F3/45 ,  H03H11/12 ,  H03H19/00 ,  H04B1/30 ,  H04B1/16

CPC分类号： H03H11/1291 ,  H03F1/34 ,  H03F3/45475 ,  H03F3/45968 ,  H03F3/45977 ,  H03F2200/78 ,  H03F2203/45212 ,  H03F2203/45424 ,  H03F2203/45514 ,  H03H19/004 ,  H04B1/30

摘要： Two reference signals are applied to an RC calibration circuit, which utilizes programmable resistors and switched capacitor resistors in parallel at the inputs of a differential amplifier with feedback capacitors, for the first cycle and then the two reference signals are swapped for the successive cycle. The circuit inherent DC offset is cancelled by these two successive cycles. The time duration when the difference of the differential amplifier outputs in the calibration circuit starts to reverse ramping direction and the time when the difference crosses zero is counted in terms of reference clock cycles by a binary counter. The binary count is used to select the capacitance of the capacitor arrays in an RC filter for time constant calibration. This calibration circuit provides the flexibility for various reference clock rates by adjusting the programmable resistors. By tuning the same programmable resistors, this calibration circuit in addition provides the capability to changing the cut-off frequency of an RC filter circuit to another predetermined value.

摘要翻译： 两个参考信号被施加到RC校准电路，其在具有反馈电容器的差分放大器的输入端并联使用可编程电阻器和开关电容器电阻器，用于第一周期，然后两个参考信号被交换为连续循环。 电路固有的直流偏移由这两个连续的周期消除。 当校准电路中的差分放大器输出的差开始反向斜坡方向和差异跨越零的时间时，通过二进制计数器来计算参考时钟周期的持续时间。 二进制计数用于选择RC滤波器中电容器阵列的电容进行时间常数校准。 该校准电路通过调整可编程电阻器为各种参考时钟速率提供了灵活性。 通过调谐相同的可编程电阻器，该校准电路另外提供了将RC滤波器电路的截止频率改变到另一个预定值的能力。

公开(公告)号：US06865186B1

公开(公告)日：2005-03-08

申请号：US09501699

申请日：2000-02-10

申请人： Geoffrey B. Jackson ,  Saleel V. Awsare ,  Ming-Bing Chang ,  Peter Holzmann ,  Oliver Chihkuang Kao ,  Hung-Chuan Pai ,  Carl R. Palmer ,  Aditya Raina

发明人： Geoffrey B. Jackson ,  Saleel V. Awsare ,  Ming-Bing Chang ,  Peter Holzmann ,  Oliver Chihkuang Kao ,  Hung-Chuan Pai ,  Carl R. Palmer ,  Aditya Raina

IPC分类号： G06F12/00 ,  G11C7/16 ,  G11C11/56 ,  G11C27/00 ,  H04L12/28

CPC分类号： G11C27/005 ,  G11C7/16 ,  G11C11/5621 ,  G11C2207/16

摘要： A multilevel analog recording and playback system is described. An analog processing circuit processes analog data. A storage circuit includes a non-volatile memory array, a switching circuit, and a communication interface. The non-volatile memory array stores analog and digital data. The switching circuit transfers the analog and digital data to and from the memory array. The communication interface allows a processor to exchange information with the device.

摘要翻译： 描述了多级模拟录音和播放系统。 模拟处理电路处理模拟数据。 存储电路包括非易失性存储器阵列，开关电路和通信接口。 非易失性存储器阵列存储模拟和数字数据。 开关电路将模拟和数字数据传送到存储器阵列和从存储器阵列传送。 通信接口允许处理器与设备交换信息。

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。