公开(公告)号：US07183858B2

公开(公告)日：2007-02-27

申请号：US11094272

申请日：2005-03-31

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H03F3/191

CPC classification number: H04B1/0483

Abstract: A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second programmable gain amplifiers (PGAs). The first PGA is tuned to have a resonant frequency that is less than an operating frequency of the first PGA. The second PGA is tuned to have a resonant frequency that is greater than an operating frequency of the second PGA. A magnitude response at an output of the first PGA and a magnitude response at an output of the second PGA combine to provide a substantially linear magnitude response across a frequency range that includes the operating frequency of the first or second PGA. According to an embodiment, the first and second PGAs have the same operating frequency.

Abstract translation: 提供了一种方法和装置，用于使得发射机具有基本线性的幅度响应和基本上线性的相位响应。 发射机包括第一和第二可编程增益放大器（PGA）。 第一个PGA调谐为具有小于第一个PGA的工作频率的谐振频率。 第二PGA调谐为具有大于第二PGA的工作频率的谐振频率。 在第一PGA的输出处的幅度响应和在第二PGA的输出处的幅度响应组合以在包括第一或第二PGA的工作频率的频率范围内提供基本上线性的幅度响应。 根据实施例，第一和第二PGA具有相同的工作频率。

公开(公告)号：US07103327B2

公开(公告)日：2006-09-05

申请号：US10173740

申请日：2002-06-18

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/06

CPC classification number: H04B1/0475

Abstract: A single side band transmitter having reduced DC offset includes a current source modulation module, a current mirror module, a 1st mixing module, a 2nd mixing module, a summing module, and a power amplifier. The current source module is operably coupled to modulate, in accordance with a modulation protocol (e.g., FSK) data to produce an in-phase current component and a quadrature current component. The current mirror module is operably coupled to mirror the in-phase current component to produce a mirrored in-phase current component and is also operably coupled to mirror the quadrature current component to produce a mirrored quadrature current component. The 1st mixing module is operably coupled to mix the mirrored in-phase current component with an in-phase current component of a local oscillation to produce a 1st mixed current signal. The 2nd mixing module is operably coupled to mix the mirrored quadrature current component with a quadrature component of the local oscillation to produce a 2nd mixed current signal. The summing module is operably coupled to sum the 1st and 2nd mixed current signals to produce an up converted signal. The power amplifier amplifies the up converted signal prior to transmission as a radio frequency signal.

Abstract translation: 具有减小的DC偏移的单个边带发射器包括电流源调制模块，电流镜模块，混合模块，混合模块2，混合模块，求和模块 和功率放大器。 电流源模块可操作地耦合以根据调制协议（例如，FSK）数据进行调制以产生同相电流分量和正交电流分量。 电流镜模块可操作地耦合以镜像同相电流分量以产生镜像的同相电流分量，并且还可操作地耦合以镜像正交电流分量以产生镜像正交电流分量。 混合模块可操作地耦合以将镜像的同相电流分量与本地振荡的同相电流分量混合以产生第一混合电流信号 。 混合模块可操作地耦合以将镜像正交电流分量与本地振荡的正交分量混合以产生第二混合电流信号。 求和模块可操作地耦合以对第一和第二和/或第二混合电流信号求和以产生上变频信号。 功率放大器在传输之前放大上变频信号作为射频信号。

公开(公告)号：US20050220223A1

公开(公告)日：2005-10-06

申请号：US10865951

申请日：2004-06-14

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H03D3/00 ,  H04L27/06

CPC classification number: H03D3/007

Abstract: The invention enables a reversing IQ polarity in a bandpass filter so that the bandpass filter can filter signals with high side or low side injection.

Abstract translation: 本发明使得带通滤波器中的IQ极性反转，使得带通滤波器可以对具有高侧或低侧注入的信号进行滤波。

公开(公告)号：US20050164657A1

公开(公告)日：2005-07-28

申请号：US10877975

申请日：2004-06-29

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04L27/20 ,  H04B1/04 ,  H01Q11/12 ,  H03M3/00

CPC classification number: H04B1/0475 ,  H03M1/0673 ,  H03M3/502 ,  H04B1/30 ,  H04L27/20

Abstract: The system and method enable simpler analog processing in a transmitter by reducing the number of bits in a digital signal through delta sigma modulation. Selection of current sources in a digital to analog converter of the transmitter is done using a randomization circuit.

Abstract translation: 该系统和方法通过减少通过Δ-Σ调制的数字信号中的位数来实现发射机中的更简单的模拟处理。 使用随机化电路对发射机的数模转换器中的电流源进行选择。

公开(公告)号：US20050163255A1

公开(公告)日：2005-07-28

申请号：US10761626

申请日：2004-01-22

Applicant: Meng-An Pan ,  Bojko Marholev

Inventor： Meng-An Pan ,  Bojko Marholev

IPC: H04L27/20 ,  H04L27/36

CPC classification number: H04L27/20

Abstract: The system and method enable simpler analog processing by reducing the number of bits in a digital signal through delta sigma modulation.

Abstract translation: 该系统和方法通过减少通过ΔΣ调制的数字信号中的位数来实现更简单的模拟处理。

公开(公告)号：US08639197B2

公开(公告)日：2014-01-28

申请号：US12079389

申请日：2008-03-25

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04 ,  H04B17/00

CPC classification number: H04B17/10

Abstract: According to one exemplary embodiment, a method of preventing harmonics from causing distortion in a communications system includes feeding a test signal through a pre-distortion circuit in the communications system to a transmitter in the communications system. The method continues by transmitting a distorted output signal produced by the transmitter to an analyzer, analyzing the distorted output signal to identify one or more undesired harmonics, and generating and sending calibration data from the analyzer to calibrate the pre-distortion circuit, thereby preventing the one or more undesired harmonics from causing distortion in the communications system. In one embodiment, a system to prevent harmonics from causing distortion in a communications system includes a pre-distortion circuit, a transmitter, and an analyzer configured to identify one or more undesired harmonics and to generate and send calibration data to prevent the undesired harmonics from causing distortion.

Abstract translation: 根据一个示例性实施例，一种防止谐波在通信系统中引起失真的方法包括将通信系统中的预失真电路的测试信号馈送到通信系统中的发射机。 该方法通过将由发射器产生的失真的输出信号发送到分析器来继续，分析失真的输出信号以识别一个或多个不需要的谐波，以及从分析器产生和发送校准数据以校准预失真电路，从而防止 一个或多个不需要的谐波从而导致通信系统中的失真。 在一个实施例中，防止谐波在通信系统中引起失真的系统包括预失真电路，发射器和分析器，其被配置为识别一个或多个不期望的谐波，并且生成和发送校准数据以防止不期望的谐波 造成失真。

公开(公告)号：US08548390B2

公开(公告)日：2013-10-01

申请号：US12751836

申请日：2010-03-31

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/00

CPC classification number: H04B1/036

Abstract: Aspects of compensating for transmitter output power may comprise sampling an on-chip transmitter circuit temperature at various time instants and determining a feedback temperature compensation value. At least one digital-to-analog converter may be adjusted by utilizing the feedback temperature compensation value, which may correspond to the sampled temperature. The digital-to-analog converter may be an I-component digital-to-analog converter and/or a Q-component digital-to-analog converter. At least a portion of the on-chip transmitter circuit may be characterized to determine power output dependence of the on-chip transmitter circuit on temperature variation of the on-chip transmitter circuit. Based on this characterization, a feedback temperature compensation value that may correspond to the sampled temperature may be used to adjust the digital-to-analog converter. The feedback temperature compensation value may be, for example, from a lookup table or an algorithm.

Abstract translation: 补偿发射机输出功率的方面可以包括在不同时刻对片上发射机电路温度进行采样，并确定反馈温度补偿值。 可以通过利用可对应于采样温度的反馈温度补偿值来调节至少一个数模转换器。 数模转换器可以是I分量数模转换器和/或Q分量数模转换器。 片上发射机电路的至少一部分可以被表征为确定片上发射机电路对片上发射机电路的温度变化的功率输出依赖性。 基于该特征，可以使用可对应于采样温度的反馈温度补偿值来调整数模转换器。 反馈温度补偿值可以是例如来自查找表或算法的。

公开(公告)号：US08437724B2

公开(公告)日：2013-05-07

申请号：US10977874

申请日：2004-10-29

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/10

CPC classification number: H03D7/1441 ,  H03D3/008 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0033 ,  H03D2200/0047 ,  H03D2200/0084

Abstract: A method and system for output common mode control for reducing DC offset for an IF mixer that downconverts a received signal to DC without introducing additional offset is provided. Aspects of the method may comprise averaging signals having an output common mode DC level, which are generated from an output of the mixer. This determined average may then be compared to a reference voltage. The reference voltage may be an output common mode DC level required for baseband processing. The output common mode DC level may be corrected at an input of the mixer for signals that may subsequently be generated from an output of the mixer by utilizing results from the comparison. The corrected common mode DC offset level may be fed back to an input of the mixer.

Abstract translation: 提供了一种用于输出共模控制的方法和系统，用于减少用于将接收信号下变频到DC而不引入附加偏移的IF混频器的DC偏移。 该方法的方面可以包括平均具有从混频器的输出产生的输出共模DC电平的信号。 然后将该确定的平均值与参考电压进行比较。 参考电压可以是基带处理所需的输出共模DC电平。 输出共模DC电平可以在混频器的输入处被校正，用于随后可以通过利用比较结果从混频器的输出产生信号。 校正的共模DC偏移电平可以被反馈到混频器的输入端。

公开(公告)号：US08116677B2

公开(公告)日：2012-02-14

申请号：US12862111

申请日：2010-08-24

Applicant: Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Meng-An Pan ,  Hung-Ming Chien ,  Shahla Khorram ,  William T. Colleran ,  Jacob Rael ,  Masood Syed ,  Brima Ibrahim ,  Stephen Wu ,  Shervin Moloudi

Inventor： Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Meng-An Pan ,  Hung-Ming Chien ,  Shahla Khorram ,  William T. Colleran ,  Jacob Rael ,  Masood Syed ,  Brima Ibrahim ,  Stephen Wu ,  Shervin Moloudi

IPC: H04B7/14

CPC classification number: H03D3/244 ,  H03J2200/04 ,  H03L7/0995 ,  H03L7/18 ,  H03L2207/12 ,  H04B1/707 ,  H04B1/713 ,  H04B17/101 ,  H04B17/14 ,  H04B17/19 ,  H04B17/20

Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.

Abstract translation: 在说明书和附图中描述和示出的本发明的示例性实施例是具有接收器，发射器，本地振荡器（LO）发生器，控制器和自检单元的收发器。 所有这些组件都可以封装以集成到单个IC中，其中包括过滤器和电感器等组件。 用于接收机，发射机和LO发生器的自适应编程和校准的控制器。 自检单元产生用于确定接收机，发射机和LO发生器的增益，频率特性，选择性，本底噪声和失真特性。 要强调的是，该摘要被提供以符合要求摘要的规则，这将允许搜索者或其他读者快速确定技术公开的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。

公开(公告)号：US20110092168A1

公开(公告)日：2011-04-21

申请号：US12588616

申请日：2009-10-21

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B17/00 ,  H04L27/00

CPC classification number: H04L27/364 ,  H04B17/0085 ,  H04B17/101 ,  H04B17/104

Abstract: A method and apparatus is disclosed to optimize one or more operational parameters of a communications transmitter to reduce undesirable noise and/or interference embedded within a transmitted communications signal resulting from one or more imperfections. A baseband processor selects one or more calibration signals to allow for optimization of one or more statistical parameters. A calibration module determines the one or more statistical parameters of the transmitted communications signal in response to the one or more calibration signals. The calibration module provides one or more compensation parameters indicative of the one or more statistical parameters to the baseband processor module. The baseband processor adjusts the one or more operational parameters of the communications transmitter in response to the one or more compensation parameters. The calibration module and the baseband processor continue to determine the one or more statistical parameters and to adjust the one or more operational parameters in a similar manner until the one or more statistical parameters are optimized.

Abstract translation: 公开了一种方法和装置，用于优化通信发射机的一个或多个操作参数，以减少嵌入在由一个或多个缺陷产生的发射通信信号中的不期望的噪声和/或干扰。 基带处理器选择一个或多个校准信号以允许优化一个或多个统计参数。 校准模块响应于一个或多个校准信号来确定所发送的通信信号的一个或多个统计参数。 校准模块向基带处理器模块提供指示一个或多个统计参数的一个或多个补偿参数。 基带处理器响应于一个或多个补偿参数来调整通信发射机的一个或多个操作参数。 校准模块和基带处理器继续确定一个或多个统计参数并且以类似的方式调整一个或多个操作参数，直到优化一个或多个统计参数。