公开(公告)号：US20100054378A1

公开(公告)日：2010-03-04

申请号：US12330518

申请日：2008-12-09

申请人： Kun-Chien Hung ,  Ying-Yao Lin

发明人： Kun-Chien Hung ,  Ying-Yao Lin

IPC分类号： H04L27/16

CPC分类号： H04L27/16

摘要： A center frequency adjustment device for a communications receiver includes an A/D converter coupled to an analog filter in the communications receiver for converting an output signal of the analog filter to a digital signal, a carrier frequency offset estimator coupled to the A/D converter for estimating a carrier frequency offset of the communications receiver according to the digital signal, and a control circuit coupled to the analog filter and the carrier frequency offset estimator for adjusting a center frequency of the analog filter according to the carrier frequency offset.

摘要翻译： 用于通信接收机的中心频率调节装置包括耦合到通信接收机中的模拟滤波器的A / D转换器，用于将模拟滤波器的输出信号转换为数字信号，耦合到A / D转换器的载波频率偏移估计器 用于根据数字信号估计通信接收机的载波频率偏移;以及控制电路，耦合到模拟滤波器和载波频率偏移估计器，用于根据载波频率偏移调整模拟滤波器的中心频率。

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：US08080982B2

公开(公告)日：2011-12-20

申请号：US12357382

申请日：2009-01-21

申请人： Ying-Yao Lin ,  Cheng-Chung Hsu

发明人： Ying-Yao Lin ,  Cheng-Chung Hsu

IPC分类号： G05F1/565

CPC分类号： G05F1/56

摘要： A low drop-out (LDO) voltage regulator with efficient frequency compensation is disclosed. The LDO voltage regulator includes an error amplifier, a transmission element, a voltage divider and a pole control unit. The error amplifier generates a control signal according to a reference voltage and a feedback voltage. The transmission element is coupled to the error amplifier, and adjusts an input voltage to generate an output voltage according to the control signal. The voltage divider is coupled to the transmission element, and performs a voltage division operation on the output voltage to generate the feedback voltage. The pole control unit is coupled to the transmission element, and provides and adjusts an output capacitor of the LDO voltage regulator to fix a frequency of a pole according to variation of an output impedance of the transmission element, so as to maintain loop stability.

摘要翻译： 公开了一种具有高效频率补偿的低压差（LDO）稳压器。 LDO稳压器包括误差放大器，传输元件，分压器和极点控制单元。 误差放大器根据参考电压和反馈电压产生控制信号。 传输元件耦合到误差放大器，并根据控制信号调整输入电压以产生输出电压。 分压器耦合到传输元件，并对输出电压进行分压操作以产生反馈电压。 极控制单元耦合到传输元件，并且提供并调节LDO电压调节器的输出电容器，以根据变速器元件的输出阻抗的变化来固定极点的频率，从而保持环路的稳定性。

公开(公告)号：US20110223878A1

公开(公告)日：2011-09-15

申请号：US12842054

申请日：2010-07-23

申请人： Ying-Yao Lin ,  Ren-Chieh Liu

发明人： Ying-Yao Lin ,  Ren-Chieh Liu

IPC分类号： H04B17/00 ,  H04B1/06

CPC分类号： H04B1/1027 ,  H03G3/3068 ,  H04B17/318

摘要： A signal strength detecting device of a communication system is disclosed. The signal strength detecting device is coupled to a frequency down mixer of the communication system and the frequency down mixer is used for receiving and converting a first signal to a second signal whose frequencies are lower than frequencies of the first signal. The signal strength detecting device comprises a frequency up converter for receiving and converting the second signal to a third signal whose frequencies are higher than the frequencies of the second signal and a detecting unit for detecting strength of the third signal and generating a signal strength indicator to the communication system according to a detecting result corresponding to the strength of the third signal, wherein the signal strength indicator represents the strength of the first signal received by the frequency down mixer.

摘要翻译： 公开了一种通信系统的信号强度检测装置。 信号强度检测装置耦合到通信系统的降频混频器，降频混频器用于接收第一信号并将其转换成频率低于第一信号频率的第二信号。 信号强度检测装置包括上变频器，用于接收第二信号并将其转换成频率高于第二信号的频率的第三信号;以及检测单元，用于检测第三信号的强度并产生信号强度指示符 所述通信系统根据与所述第三信号的强度相对应的检测结果，其中，所述信号强度指示符表示由所述降频混频器接收的所述第一信号的强度。

公开(公告)号：US07583166B2

公开(公告)日：2009-09-01

申请号：US11462997

申请日：2006-08-07

申请人： Ying-Yao Lin ,  Ying-Hsi Lin

发明人： Ying-Yao Lin ,  Ying-Hsi Lin

IPC分类号： H03H11/00 ,  H03M1/12 ,  G06G7/12 ,  G11C27/02 ,  H03K5/00 ,  G06F7/64 ,  G06G7/18 ,  G06G7/19 ,  H03B1/00 ,  H04B1/10 ,  H03F1/02 ,  H03G3/12 ,  H03F3/45 ,  H01F29/04 ,  G05F1/14 ,  H03J3/20

CPC分类号： H03H11/52 ,  H03F2200/369 ,  H03J3/20

摘要： The present invention provides an apparatus for enhancing Q factor of an inductor. The apparatus includes a negative resistance generator coupled to the inductor for providing a negative resistance, and a bias circuit coupled to the negative resistance generator for biasing the negative resistance generator.

摘要翻译： 本发明提供一种用于增强电感器的Q因子的装置。 该装置包括耦合到电感器以提供负电阻的负电阻发生器，以及耦合到负电阻发生器以偏置负电阻发生器的偏置电路。

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：US20070058754A1

公开(公告)日：2007-03-15

申请号：US11532101

申请日：2006-09-15

申请人： Ying-Yao Lin ,  Fong-Ching Huang

发明人： Ying-Yao Lin ,  Fong-Ching Huang

IPC分类号： H04L27/22

CPC分类号： H03D3/009 ,  H03D2200/0029

摘要： An apparatus and a method for calibrating IQ mismatch to ensure that an in-phase oscillating signal and a quadrature-phase oscillating signal are orthogonal to each other. The apparatus includes a mixer for mixing the in-phase oscillating signal with the quadrature-phase oscillating signal to generate an output signal, a control module for determining a control signal according to a low-frequency component of the output signal, and a phase adjusting module for adjusting the phase of a specific oscillating signal to ensure that the in-phase oscillating signal and the quadrature-phase oscillating signal are orthogonal to each other. The specific oscillating signal may be the in-phase or the quadrature-phase oscillating signal. The apparatus does not require a digital signal-processing unit to perform complex calculations nor requires additional oscillating sources for calibration. Hence, the circuit design is much simplified, and the consumption of system resources is significantly reduced.

摘要翻译： 用于校准IQ失配以确保同相振荡信号和正交相位振荡信号彼此正交的装置和方法。 该装置包括：混合器，用于将同步振荡信号与正交振荡信号混频以产生输出信号;控制模块，用于根据输出信号的低频分量确定控制信号;以及相位调整 模块，用于调整特定振荡信号的相位，以确保同相振荡信号和正交振荡信号彼此正交。 特定振荡信号可以是同相或正交相位振荡信号。 该装置不需要数字信号处理单元执行复杂的计算，也不需要额外的振荡源进行校准。 因此，电路设计大大简化，系统资源的消耗明显减少。

公开(公告)号：US20060199559A1

公开(公告)日：2006-09-07

申请号：US11164883

申请日：2005-12-08

申请人： Ying-Yao Lin ,  Ying-Hsi Lin

发明人： Ying-Yao Lin ,  Ying-Hsi Lin

IPC分类号： H04B1/18

CPC分类号： H04B1/0067

摘要： A multi-band receiver is disclosed. The multi-band receiver includes a low-noise amplifier (LNA) and a mixer. The LNA includes a switched receiving circuit, a loading circuit, and a switching circuit. The switched receiving circuit has a first receiving circuit for receiving a first signal corresponding to a first frequency, and a second receiving circuit for receiving a second signal corresponding to a second frequency. The loading circuit is utilized for providing a specific load to the switched receiving circuit. The switching circuit is used for controlling whether the first signal or the second signal is transferred to the loading circuit. The mixer is coupled to the low-noise amplifier for receiving an output signal generated from the LNA and for down-converting the output signal.

摘要翻译： 公开了一种多频带接收机。 多频带接收机包括低噪声放大器（LNA）和混频器。 LNA包括开关接收电路，负载电路和开关电路。 切换接收电路具有用于接收对应于第一频率的第一信号的第一接收电路和用于接收对应于第二频率的第二信号的第二接收电路。 加载电路用于向切换的接收电路提供特定的负载。 开关电路用于控制第一信号或第二信号是否传送到负载电路。 混频器耦合到低噪声放大器，用于接收从LNA产生的输出信号，并对输出信号进行下变频。

公开(公告)号：US07102441B2

公开(公告)日：2006-09-05

申请号：US11148132

申请日：2005-06-08

申请人： Chao Cheng Lee ,  Ying Yao Lin

发明人： Chao Cheng Lee ,  Ying Yao Lin

IPC分类号： H03G3/10

CPC分类号： H03G1/0088

摘要： A variable gain amplifying circuit, which applies a resistor ladder to obtain a more precise gain, is disclosed. The amplifying circuit includes an input, an operational amplifier (op-amp), a resistor unit and a feedback resistor. The feedback resistor is coupled between an output and an inverting input of the op-amp. The resistor unit includes at least one resistor ladder. The resistor unit further includes a switching unit for controlling whether the at least one resistor ladder is coupled between the input of the amplifying circuit and the inverting input of the op-amp. A differential amplifying circuit for more precise gain adjustment is also disclosed.

摘要翻译： 公开了一种可变增益放大电路，其应用电阻梯以获得更精确的增益。 放大电路包括输入，运算放大器（运算放大器），电阻器单元和反馈电阻器。 反馈电阻耦合在运算放大器的输出和反相输入端之间。 电阻器单元包括至少一个电阻梯。 电阻器单元还包括用于控制至少一个电阻梯是否耦合在放大电路的输入端和运算放大器的反相输入端之间的开关单元。 还公开了一种用于更精确增益调整的差分放大电路。