公开(公告)号：US20050180532A1

公开(公告)日：2005-08-18

申请号：US10908109

申请日：2005-04-28

申请人： Chao-Cheng Lee ,  Ying-Yao Lin ,  Ying-Hsi Lin

发明人： Chao-Cheng Lee ,  Ying-Yao Lin ,  Ying-Hsi Lin

IPC分类号： H04L1/00

CPC分类号： H04B1/30 ,  H04B17/11

摘要： A method and device for calibrating in-phase and quadrature-phase (IQ) mismatch. The device is used in a direct down-conversion circuit of a communication system. The device has a first mixer for mixing an RF signal with a first carrier signal, so as to generate an in-phase analog signal; a second mixer for mixing the RF signal with a second carrier signal, so as to generate a quadrature-phase analog signal; an operation unit for executing a Least Mean Square (LMS) algorithm and thereby generating a compensation signal according to the in-phase analog signal and the quadrature-phase analog signal; and a calibration unit for compensating the in-phase analog signal and the quadrature-phase analog signal according to the compensation signal, so as to calibrate the IQ mismatch between the in-phase analog signal and the quadrature-phase analog signal.

摘要翻译： 用于校准同相和正交相（IQ）失配的方法和装置。 该设备用于通信系统的直接下变频电路。 该装置具有用于混合RF信号与第一载波信号的第一混频器，以产生同相模拟信号; 第二混频器，用于将RF信号与第二载波信号混频，以产生正交相位模拟信号; 操作单元，用于执行最小均方（LMS）算法，从而根据同相模拟信号和正交相位模拟信号产生补偿信号; 以及校准单元，用于根据补偿信号补偿同相模拟信号和正交相位模拟信号，以便校准同相模拟信号和正交相位模拟信号之间的IQ失配。

公开(公告)号：US20050152481A1

公开(公告)日：2005-07-14

申请号：US10905496

申请日：2005-01-07

申请人： Ying-Yao Lin ,  Chao-Cheng Lee

发明人： Ying-Yao Lin ,  Chao-Cheng Lee

IPC分类号： H03D3/00 ,  H04L1/00 ,  H04L27/00

CPC分类号： H03D3/009 ,  H04L27/0014 ,  H04L2027/0016 ,  H04L2027/0024

摘要： A method and an apparatus of IQ mismatch calibration in a radio communication system. The method includes receiving a radio frequency signal, mixing the radio frequency signal with a first carrier to generate an In-phase analog signal, mixing the radio frequency signal with a second carrier to generate a Quadrature-phase analog signal, detecting a phase offset between the In-phase analog signal and the Quadrature-phase analog signal, computing at least a tuning parameter according to the phase offset, and calibrating at least one of the In-phase analog signal and the Quadrature-phase analog signal according to at least one of the phase offset and the tuning parameter such that the In-phase analog signal and the Quadrature-phase analog signal are orthogonal after calibration.

摘要翻译： 无线电通信系统中IQ失配校准的方法和装置。 该方法包括接收射频信号，将射频信号与第一载波混合以产生同相模拟信号，将射频信号与第二载波混合以产生正交相位模拟信号，检测正交相位模拟信号之间的相位偏移 所述同步模拟信号和所述正相模拟信号，根据所述相位偏移来计算至少一个调谐参数，并且根据至少一个校准所述同相模拟信号和所述正相模拟信号中的至少一个 的相位偏移和调谐参数，使得校准后的同相模拟信号和正交相位模拟信号是正交的。

公开(公告)号：US07636405B2

公开(公告)日：2009-12-22

申请号：US10908109

申请日：2005-04-28

申请人： Chao-Cheng Lee ,  Ying-Yao Lin ,  Ying-Hsi Lin

发明人： Chao-Cheng Lee ,  Ying-Yao Lin ,  Ying-Hsi Lin

IPC分类号： H04L1/00

CPC分类号： H04B1/30 ,  H04B17/11

摘要： A method and device for calibrating in-phase and quadrature-phase (IQ) mismatch. The device is used in a direct down-conversion circuit of a communication system. The device has a first mixer for mixing an RF signal with a first carrier signal, so as to generate an in-phase analog signal; a second mixer for mixing the RF signal with a second carrier signal, so as to generate a quadrature-phase analog signal; an operation unit for executing a Least Mean Square (LMS) algorithm and thereby generating a compensation signal according to the in-phase analog signal and the quadrature-phase analog signal; and a calibration unit for compensating the in-phase analog signal and the quadrature-phase analog signal according to the compensation signal, so as to calibrate the IQ mismatch between the in-phase analog signal and the quadrature-phase analog signal.

摘要翻译： 用于校准同相和正交相（IQ）失配的方法和装置。 该设备用于通信系统的直接下变频电路。 该装置具有用于混合RF信号与第一载波信号的第一混频器，以产生同相模拟信号; 第二混频器，用于将RF信号与第二载波信号混频，以产生正交相位模拟信号; 操作单元，用于执行最小均方（LMS）算法，从而根据同相模拟信号和正交相位模拟信号产生补偿信号; 以及校准单元，用于根据补偿信号补偿同相模拟信号和正交相位模拟信号，以便校准同相模拟信号和正交相位模拟信号之间的IQ失配。

公开(公告)号：US20060250181A1

公开(公告)日：2006-11-09

申请号：US11381548

申请日：2006-05-04

申请人： Chao-Cheng Lee ,  Ying-Yao Lin

发明人： Chao-Cheng Lee ,  Ying-Yao Lin

IPC分类号： H03K5/00

CPC分类号： H03K5/086 ,  H03H11/1286 ,  H03H11/1291

摘要： A bandwidth-adjustable filter includes an operational amplifier, a first resistor, a first capacitor and a first resistor ladder circuit. The operational amplifier has a negative input terminal and a positive input terminal The first resistor is coupled to one of the input terminals of the operational amplifier. The first capacitor is coupled to the first resistor. The first resistor ladder circuit is coupled in parallel to the first resistor for changing the resistance of the first resistor so as to adjust the bandwidth of the filter.

摘要翻译： 带宽可调滤波器包括运算放大器，第一电阻器，第一电容器和第一电阻梯形电路。 运算放大器具有负输入端和正输入端。第一电阻耦合到运算放大器的一个输入端。 第一电容器耦合到第一电阻器。 第一电阻梯形电路并联耦合到第一电阻器，用于改变第一电阻器的电阻，以调整滤波器的带宽。

公开(公告)号：US08891682B2

公开(公告)日：2014-11-18

申请号：US11559396

申请日：2006-11-13

申请人： Chao-Cheng Lee ,  Ying-Yao Lin

发明人： Chao-Cheng Lee ,  Ying-Yao Lin

IPC分类号： H03K9/00 ,  H04B1/28 ,  H03D7/18

CPC分类号： H04B1/28 ,  H03D7/18 ,  H03D2200/0086

摘要： A mixer for the elimination of harmonic mixing in signal transmission is presented. The mixer incorporates a mixing unit and a modulation output unit. The mixing unit receives an input signal and a modulated signal, and outputs an output signal after signal mixing. The modulation output unit is for the generation of modulated signals, which are usually pulse-width modulated. The modulation output unit includes a delta sigma modulator and a digital domain code generator. The delta sigma modulator outputs the modulated signal responding to the received oscillation signal and digital domain code, the digital domain code generator generates the digital domain code in order to provide digital domain sine wave code for the use of the delta sigma modulator. The oscillation signal may be a signal of constant hi-frequency, or a signal that has a frequency larger or equal to that of the input signal by an integer factor.

摘要翻译： 提出了一种用于消除信号传输中谐波混合的混频器。 混合器包括混合单元和调制输出单元。 混合单元接收输入信号和调制信号，并在信号混合后输出输出信号。 调制输出单元用于产生调制信号，调制信号通常是脉冲宽度调制的。 调制输出单元包括ΔΣ调制器和数字域代码发生器。 ΔΣ调制器响应于接收到的振荡信号和数字域代码输出调制信号，数字域代码生成器生成数字域代码，以便为使用Δ-Σ调制器提供数字域正弦波码。 振荡信号可以是恒定高频的信号，或具有与输入信号的频率大于或等于整数因子的频率的信号。

公开(公告)号：US20100060348A9

公开(公告)日：2010-03-11

申请号：US11381548

申请日：2006-05-04

申请人： Chao-Cheng Lee ,  Ying-Yao Lin

发明人： Chao-Cheng Lee ,  Ying-Yao Lin

IPC分类号： H03K5/00

CPC分类号： H03K5/086 ,  H03H11/1286 ,  H03H11/1291

摘要： A bandwidth-adjustable filter includes an operational amplifier, a first resistor, a first capacitor and a first resistor ladder circuit. The operational amplifier has a negative input terminal and a positive input terminal The first resistor is coupled to one of the input terminals of the operational amplifier. The first capacitor is coupled to the first resistor. The first resistor ladder circuit is coupled in parallel to the first resistor for changing the resistance of the first resistor so as to adjust the bandwidth of the filter.

摘要翻译： 带宽可调滤波器包括运算放大器，第一电阻器，第一电容器和第一电阻梯形电路。 运算放大器具有负输入端和正输入端。第一电阻耦合到运算放大器的一个输入端。 第一电容器耦合到第一电阻器。 第一电阻梯形电路并联耦合到第一电阻器，用于改变第一电阻器的电阻，以调整滤波器的带宽。

公开(公告)号：US07560990B2

公开(公告)日：2009-07-14

申请号：US11687671

申请日：2007-03-19

申请人： Ying-Yao Lin ,  Chao-Cheng Lee ,  Ying-Hsi Lin

发明人： Ying-Yao Lin ,  Chao-Cheng Lee ,  Ying-Hsi Lin

IPC分类号： H03G3/10

CPC分类号： H03G1/0088 ,  H03G1/0029

摘要： A low noise amplifier for operating in response to different gain modes is disclosed. The low noise amplifier includes a voltage adjusting circuit, which provides a first bias voltage at a first gain mode and provides a second bias voltage at a second gain mode, where the second bias voltage is different from the first bias voltage; and an amplifying circuit coupled to the voltage adjusting circuit, for providing a first transfer characteristic according to the first bias voltage during the first gain mode in order to amplify an input signal to generate an output signal, and for providing a second transfer characteristic according to the second bias voltage during the second gain mode in order to amplify the input signal to generate the output signal.

摘要翻译： 公开了一种用于响应不同增益模式工作的低噪声放大器。 低噪声放大器包括电压调节电路，其提供第一增益模式的第一偏置电压，并在第二增益模式提供第二偏置电压，其中第二偏置电压不同于第一偏置电压; 以及耦合到所述电压调节电路的放大电路，用于在所述第一增益模式期间根据所述第一偏置电压提供第一传输特性，以便放大输入信号以产生输出信号，并且用于根据所述第一传输特性提供根据 在第二增益模式期间的第二偏置电压，以便放大输入信号以产生输出信号。

公开(公告)号：US07078972B2

公开(公告)日：2006-07-18

申请号：US10709197

申请日：2004-04-20

申请人： Ying-Yao Lin ,  Chao-Cheng Lee ,  Tung-Ming Su

发明人： Ying-Yao Lin ,  Chao-Cheng Lee ,  Tung-Ming Su

IPC分类号： H03F3/45

CPC分类号： H03F3/45085 ,  H03F2203/45566 ,  H03F2203/45702 ,  H03G1/0023 ,  H03G7/06

摘要： A linear decibel-scale variable gain amplifier includes an amplifying stage for generating an output voltage according to a differential input voltage, and a gain-controlling stage for outputting a gain-controlling voltage to the amplifying stage according to a first controlling voltage and a second controlling voltage. A voltage gain of the linear decibel-scale variable gain amplifier is inversely proportional to a simple exponential function, and the value of the simple exponential function is determined by the difference between the first controlling voltage and the second controlling voltage. The value of the voltage gain is unaffected by changes of the thermal voltage.

摘要翻译： 线性分贝尺度可变增益放大器包括用于根据差分输入电压产生输出电压的放大级，以及用于根据第一控制电压向放大级输出增益控制电压的增益控制级，第二 控制电压。 线性分贝尺度可变增益放大器的电压增益与简单的指数函数成反比，简单指数函数的值由第一控制电压和第二控制电压之间的差确定。 电压增益的值不受热电压变化的影响。

公开(公告)号：US07075368B2

公开(公告)日：2006-07-11

申请号：US10709198

申请日：2004-04-20

申请人： Ying-Yao Lin ,  Tung-Ming Su ,  Chao-Cheng Lee

发明人： Ying-Yao Lin ,  Tung-Ming Su ,  Chao-Cheng Lee

IPC分类号： H03F3/45

CPC分类号： H03G7/001 ,  H03F3/45085 ,  H03F2203/45652 ,  H03F2203/45702 ,  H03G1/0023 ,  H03G7/06

摘要： A variable gain amplifier having a linear decibel-scale gain comprises an amplifying stage for generating an output voltage according to a differential input voltage, and a gain-controlling stage for outputting a gain-controlling voltage to the amplifying stage according to a first controlling voltage and a second controlling voltage. A voltage gain of the variable gain amplifier is inversely proportional to a simple exponential function, and the value of the simple exponential function is determined by the difference between the first controlling voltage and the second controlling voltage.

摘要翻译： 具有线性分贝尺度增益的可变增益放大器包括用于根据差分输入电压产生输出电压的放大级，以及用于根据第一控制电压向放大级输出增益控制电压的增益控制级 和第二控制电压。 可变增益放大器的电压增益与简单的指数函数成反比，简单指数函数的值由第一控制电压和第二控制电压之间的差确定。

公开(公告)号：US07737772B2

公开(公告)日：2010-06-15

申请号：US11381548

申请日：2006-05-04

申请人： Chao-Cheng Lee ,  Ying-Yao Lin

发明人： Chao-Cheng Lee ,  Ying-Yao Lin

IPC分类号： H03K5/00

CPC分类号： H03K5/086 ,  H03H11/1286 ,  H03H11/1291

摘要： A bandwidth-adjustable filter includes an operational amplifier, a first resistor, a first capacitor and a first resistor ladder circuit. The operational amplifier has a negative input terminal and a positive input terminal. The first resistor is coupled to one of the input terminals of the operational amplifier. The first capacitor is coupled to the first resistor. The first resistor ladder circuit is coupled in parallel to the first resistor for changing the resistance of the first resistor so as to adjust the bandwidth of the filter.

摘要翻译： 带宽可调滤波器包括运算放大器，第一电阻器，第一电容器和第一电阻梯形电路。 运算放大器具有负输入端和正输入端。 第一电阻器耦合到运算放大器的输入端之一。 第一电容器耦合到第一电阻器。 第一电阻梯形电路并联耦合到第一电阻器，用于改变第一电阻器的电阻，以调整滤波器的带宽。