公开(公告)号：US08675777B2

公开(公告)日：2014-03-18

申请号：US12544486

申请日：2009-08-20

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04L25/06 ,  H03D1/00

CPC classification number: H03D3/007

Abstract: A center frequency of an adjustable filter is controlled to achieve a compromise between DC offset rejection and image rejection.

Abstract translation: 控制可调滤波器的中心频率以实现DC偏移抑制和图像抑制之间的折中。

公开(公告)号：US08565696B2

公开(公告)日：2013-10-22

申请号：US12588616

申请日：2009-10-21

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04

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。

公开(公告)号：US08219046B2

公开(公告)日：2012-07-10

申请号：US12477301

申请日：2009-06-03

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04 ,  G06F7/44

CPC classification number: H03C1/36 ,  H03D7/1458 ,  H03D7/1466 ,  H03D2200/0074

Abstract: A RF transmitter is operable to transmit a signal at a frequency specified by the Bluetooth protocol. A passive upconversion mixer, which comprises a pair of MOSFET switches, is utilized inside the RF transmitter. The passive upconversion mixer is operable to receive analog local oscillator (LO) signals to be utilized for controlling operation of each of the pair of MOSFET switches to transmit signals with maximum gain. A MOS threshold voltage VTH and a DC component of a received baseband signal, VBB—DC, are determined for each of the pair of MOSFET switches. The determined VTH and the determined VBB—DC of the received baseband signal are combined such as VTH+VBB—DC and compared with a DC component of the received LO signals, VLO—DC. The VLO—DC is set equal to VTH+VBB—DC, accordingly, to provide maximum gain from the passive upconversion mixer for signal transmission.

Abstract translation: RF发射器可操作以以由蓝牙协议指定的频率发送信号。 无源上变频混频器包括一对MOSFET开关，用于RF发射器内部。 无源上变频混频器可操作以接收模拟本地振荡器（LO）信号，以用于控制一对MOSFET开关中的每一个的操作以发送具有最大增益的信号。 为这对MOSFET开关中的每一个确定接收基带信号VBB-DC的MOS阈值电压VTH和DC分量。 所接收的基带信号的确定的VTH和所确定的VBB-DC被组合，例如VTH + VBB-DC，并与所接收的LO信号VLO-DC的DC分量进行比较。 VLO-DC设置为等于VTH + VBB-DC，从而提供来自被动上变频混频器的信号传输的最大增益。

公开(公告)号：US08041294B2

公开(公告)日：2011-10-18

申请号：US12492921

申请日：2009-06-26

Applicant: Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Brima Ibrahim ,  Jacob Rael ,  Shahla Khorram ,  Shervin Moloudi ,  Stephen Wu ,  Hooman Darabi ,  William T. Colleran ,  Ed Chien ,  Meng-An Pan

Inventor： Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Brima Ibrahim ,  Jacob Rael ,  Shahla Khorram ,  Shervin Moloudi ,  Stephen Wu ,  Hooman Darabi ,  William T. Colleran ,  Ed Chien ,  Meng-An Pan

IPC: H04B7/14

CPC classification number: H04B1/40 ,  H03B21/01 ,  H03H11/1291 ,  H03H21/0001 ,  H03H21/0012 ,  H03H2011/0494 ,  H03J2200/10 ,  H04B1/30 ,  H04B17/104 ,  H04B17/14 ,  H04B17/19

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：US20110143791A1

公开(公告)日：2011-06-16

申请号：US13031331

申请日：2011-02-21

Applicant: Meng-An Pan ,  Ali Afsahi ,  Vikram Magoon ,  Arya Behzad

Inventor： Meng-An Pan ,  Ali Afsahi ,  Vikram Magoon ,  Arya Behzad

IPC: H04W88/00

CPC classification number: H04B1/02 ,  H03F1/32 ,  H03F3/24 ,  H03F2200/168 ,  H03F2200/321 ,  H03F2200/336 ,  H04B1/005 ,  H04B2001/0408

Abstract: A method and system for wireless communication is provided and may include generating a single analog quadrature signal in a chip including RF transmitters and receivers using a baseband processor, and generating output RF signals based on the quadrature signal in corresponding RF transmitters. The output RF signals may be communicated to the RF receivers via a feedback path including circuitry external to the RF receivers. The dedicated circuitry may include a transmit/receive switch and/or an on-chip or off-chip balun. The quadrature signal may include in-phase and quadrature-phase components. The output RF signal communicated via the feedback path may be down-converted utilizing mixers in the RF receivers and communicated to the baseband processor. Distortion in the quadrature signal may be estimated utilizing the communicated down-converted output RF signals and subsequently generated quadrature signals may be predistorted based on the distortion estimation.

Abstract translation: 提供了一种用于无线通信的方法和系统，并且可以包括使用基带处理器在包括RF发射机和接收机的芯片中生成单个模拟正交信号，并且基于对应的RF发射机中的正交信号产生输出RF信号。 输出RF信号可以经由包括RF接收器外部电路的反馈路径传送到RF接收器。 专用电路可以包括发送/接收开关和/或片上或片外平衡 - 不平衡转换器。 正交信号可以包括同相和正交相分量。 通过反馈路径传送的输出RF信号可以利用RF接收机中的混频器进行下变频，并传送给基带处理器。 正交信号中的失真可以利用所传送的下变频输出RF信号来估计，随后产生的正交信号可以基于失真估计来预失真。

公开(公告)号：US07860467B2

公开(公告)日：2010-12-28

申请号：US11511645

申请日：2006-08-29

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04

CPC classification number: H03F3/24 ,  H03F1/0277 ,  H03F1/22 ,  H03F3/45188 ,  H03F3/72 ,  H03F2203/45052 ,  H03F2203/45371 ,  H03F2203/45396 ,  H03F2203/45481 ,  H03F2203/45702

Abstract: A circuit may be provided. The circuit may be a component of a dual mode transmitter such as a transmitter from the 802.11x family. The circuit may comprise an amplifier configured to provide amplification of a signal for transmission in either a first transmission mode or a second transmission mode, using power supplied from a power supply, the amplifier including at least one cascode transistor in series with at least one amplifying transistor. The circuit may further comprise a power controller configured to define an operating characteristic of the at least one cascode transistor, and thereby designate an amount of the power from the power supply that is used by the amplifier during the amplification, based on whether the amplifier is to be operated in the first transmission mode or the second transmission mode.

Abstract translation: 可以提供电路。 电路可以是诸如来自802.11x系列的发射机的双模式发射机的组件。 电路可以包括放大器，其被配置为使用从电源提供的功率来提供用于在第一传输模式或第二传输模式中传输的信号的放大，该放大器包括与至少一个放大器串联的至少一个共源共栅晶体管 晶体管。 电路还可以包括功率控制器，其被配置为限定至少一个共源共栅晶体管的工作特性，从而基于放大器是否放大器来指定放大器在放大期间由电源使用的功率的量 以第一传输模式或第二传输模式操作。

公开(公告)号：US07657236B2

公开(公告)日：2010-02-02

申请号：US11204339

申请日：2005-08-16

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04

CPC classification number: H04B1/30

Abstract: A transmitter generates a transmitter output signal from first and second baseband signals. The transmitter includes a detector to detect a local oscillator (LO) leakage signal in the transmitter output signal. A controller coupled to the detector determines a direct LO coupling component and a baseband DC offset component of the LO leakage signal. First and second variable current sources are adjusted by the controller to provide first and second DC offsets to the first and second baseband signals, respectively. The first and second DC offsets reduce the direct LO coupling component. Third and fourth variable current sources are subsequently adjusted by the controller to provide third and fourth DC offsets to the first and second baseband signals, respectively. The third and fourth DC offsets reduce the baseband DC component. Overall, reducing the direct LO coupling component and the baseband DC component reduces a power of the LO leakage signal.

Abstract translation: 发射机从第一和第二基带信号产生发射机输出信号。 发射机包括检测器，用于检测发射机输出信号中的本地振荡器（LO）泄漏信号。 耦合到检测器的控制器确定LO泄漏信号的直接LO耦合分量和基带DC偏移分量。 控制器调整第一和第二可变电流源，以分别向第一和第二基带信号提供第一和第二DC偏置。 第一和第二直流偏移减少直接LO耦合分量。 随后由控制器调整第三和第四可变电流源，以分别向第一和第二基带信号提供第三和第四DC偏置。 第三和第四直流偏移减少了基带直流分量。 总之，减少直流LO耦合分量和基带DC分量降低了LO泄漏信号的功率。

公开(公告)号：US20090318100A1

公开(公告)日：2009-12-24

申请号：US12457542

申请日：2009-06-15

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04

CPC classification number: H03F3/45188 ,  H03F1/0205 ,  H03F1/0277 ,  H03F1/32 ,  H03F3/24 ,  H03F3/72 ,  H03F2203/45481 ,  H03F2203/45652 ,  H03G3/3026

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 power amplifier drivers (PADs) having respective first and second non-linear phase responses. The first non-linear phase response is based on a first bias applied to the first PAD, and the second non-linear phase response is based on a second bias applied to the second PAD. The first and second PADs are coupled in parallel to provide a combined substantially linear phase response. According to an embodiment, the first and second PADs have respective first and second average input capacitances. Signal swings about the first and second biases vary the respective first and second average input capacitances, which may be combined to provide a combined average input capacitance that is substantially insensitive to the signal swings about the first and second biases.

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。 发射机包括具有相应的第一和第二非线性相位响应的第一和第二功率放大器驱动器（PAD）。 第一非线性相位响应基于施加到第一PAD的第一偏置，并且第二非线性相位响应基于施加到第二PAD的第二偏置。 第一和第二PAD并联耦合以提供组合的基本上线性的相位响应。 根据实施例，第一和第二PAD具有相应的第一和第二平均输入电容。 关于第一和第二偏置的信号摆动改变相应的第一和第二平均输入电容，其可以被组合以提供对于关于第一和第二偏压的信号摆动基本上不敏感的组合平均输入电容。

公开(公告)号：US20090286487A1

公开(公告)日：2009-11-19

申请号：US12492921

申请日：2009-06-26

Applicant: Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Brima Ibrahim ,  Jacob Rael ,  Shahla Khorram ,  Shervin Moloudi ,  Stephen Wu ,  Hooman Darabi ,  William T. Colleran ,  Ed Chien ,  Meng-An Pan

Inventor： Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Brima Ibrahim ,  Jacob Rael ,  Shahla Khorram ,  Shervin Moloudi ,  Stephen Wu ,  Hooman Darabi ,  William T. Colleran ,  Ed Chien ,  Meng-An Pan

IPC: H04B1/38

CPC classification number: H04B1/40 ,  H03B21/01 ,  H03H11/1291 ,  H03H21/0001 ,  H03H21/0012 ,  H03H2011/0494 ,  H03J2200/10 ,  H04B1/30 ,  H04B17/104 ,  H04B17/14 ,  H04B17/19

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：US07606550B2

公开(公告)日：2009-10-20

申请号：US10976639

申请日：2004-10-29

Applicant: Meng-An Pan ,  Hooman Darabi

Inventor： Meng-An Pan ,  Hooman Darabi

IPC: H04B1/26

CPC classification number: H04B1/30

Abstract: In RF transceivers, a method and system for a dual mode receiver with low intermediate frequency (IF) and zero second IF are provided. An RF receivers may be adapted to operate in a low IF down conversion mode or a baseband down conversion mode. A control signal may be generated based on a local oscillator signal and may be utilized to configure a frequency mixer in accordance with the selected mode of operation. The frequency of the local oscillator may be based on the low IF value. When the low IF down conversion mode is selected, the frequency mixer operates in a pass through mode and the output may be transferred to a device with a low IF interface. When the baseband down conversion mode is selected, the output of the frequency mixer may be transferred to a baseband processor for further processing.

Abstract translation: 在RF收发器中，提供了具有低中频（IF）和零秒IF的双模接收机的方法和系统。 RF接收器可以适于在低IF下变频模式或基带下变频模式下工作。 可以基于本地振荡器信号来生成控制信号，并且可以根据所选择的操作模式来构造混频器。 本地振荡器的频率可以基于低IF值。 当选择低IF下变频模式时，混频器以通过模式工作，并且输出可以传送到具有低IF接口的器件。 当选择基带下变频模式时，可将混频器的输出传送到基带处理器进一步处理。