公开(公告)号：US07606321B2

公开(公告)日：2009-10-20

申请号：US10877975

申请日：2004-06-29

申请人： Meng-An Pan

发明人： Meng-An Pan

IPC分类号： H04L27/00

CPC分类号： H04B1/0475 ,  H03M1/0673 ,  H03M3/502 ,  H04B1/30 ,  H04L27/20

摘要： 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.

摘要翻译： 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：US20090247095A1

公开(公告)日：2009-10-01

申请号：US12079389

申请日：2008-03-25

申请人： Meng-An Pan

发明人： Meng-An Pan

IPC分类号： H04B17/00

CPC分类号： H04B17/10

摘要： 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.

摘要翻译： 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：US07554411B2

公开(公告)日：2009-06-30

申请号：US11656490

申请日：2007-01-23

申请人： Meng-An Pan

发明人： Meng-An Pan

IPC分类号： H03F3/191

CPC分类号： H04B1/0483

摘要： 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.

摘要翻译： 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：US07548733B2

公开(公告)日：2009-06-16

申请号：US11094758

申请日：2005-03-31

申请人： Meng-An Pan

发明人： Meng-An Pan

IPC分类号： H01Q11/12 ,  H04B1/04

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

摘要： 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.

公开(公告)号：US20090137213A1

公开(公告)日：2009-05-28

申请号：US12273313

申请日：2008-11-18

申请人： Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Jacob Rael ,  Syed Masood ,  Brima Ibrahim ,  Hung-Ming Chien ,  Stephen Wu ,  Meng-An Pan

发明人： Ahmadreza Rofougaran ,  Maryam Rofougaran ,  Jacob Rael ,  Syed Masood ,  Brima Ibrahim ,  Hung-Ming Chien ,  Stephen Wu ,  Meng-An Pan

IPC分类号： H04B1/40

CPC分类号： H03B19/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B27/00 ,  H03B2200/0078 ,  H03F1/26 ,  H03F3/45188 ,  H03F3/45475 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45464 ,  H03F2203/45526 ,  H03F2203/45544 ,  H03F2203/45554 ,  H03F2203/45638 ,  H03H11/1291 ,  H03H21/0001 ,  H03H21/0012 ,  H03H2011/0494 ,  H03J2200/08 ,  H03J2200/10 ,  H04B17/14

摘要： 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.

摘要翻译： 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：US20090010310A1

公开(公告)日：2009-01-08

申请号：US12183212

申请日：2008-07-31

申请人： 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

发明人： 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分类号： H04B1/713 ,  H04B1/707

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

摘要： 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.

公开(公告)号：US20080139139A1

公开(公告)日：2008-06-12

申请号：US11617479

申请日：2006-12-28

申请人： Meng-An Pan

发明人： Meng-An Pan

IPC分类号： H04B1/10

CPC分类号： H04B1/525

摘要： Methods and systems for a transmitter LOFT cancellation scheme that maintains IQ balance are disclosed. Aspects of one method may include providing current compensation to both differential inputs of a mixer for each of I and Q channels. An initial current compensation of X units may be provided, followed by subsequent compensation as needed. The initial compensation may be provided to each differential input of the mixers used for I and Q channels. The subsequent current compensation for the I channel may be independent of the subsequent current compensation for the Q channel. Subsequent current compensation to a first differential input for a mixer may be increased by Y units while decreasing current compensation to the second differential input of the mixer by Y units. In this manner, the DC common mode level for the mixer may remain the same at the initial DC compensation current of X units for both mixers.

摘要翻译： 公布了维持IQ平衡的发射机LOFT取消方案的方法和系统。 一种方法的方面可以包括为I和Q通道中的每一个向混频器的两个差分输入提供电流补偿。 可以提供X单位的初始电流补偿，然后根据需要进行后续补偿。 可以将初始补偿提供给用于I和Q通道的混频器的每个差分输入。 对I通道的后续电流补偿可以独立于Q通道的后续电流补偿。 对于混合器的第一差分输入的随后的电流补偿可以通过Y单元增加，同时将混合器的第二差分输入的电流补偿减少Y个单位。 以这种方式，对于两个混频器，混频器的DC共模电平在X单元的初始DC补偿电流下可以保持相同。

公开(公告)号：US20080007339A1

公开(公告)日：2008-01-10

申请号：US11902020

申请日：2007-09-18

申请人： Meng-An Pan

发明人： Meng-An Pan

IPC分类号： H03F3/45

CPC分类号： H03F3/1935 ,  H03F3/45381 ,  H03F2203/45361 ,  H03F2203/45368 ,  H03F2203/45638 ,  H03G1/0088 ,  H03G3/3042

摘要： A transmitter includes a first variable gain amplifier (VGA) and a second VGA coupled to an output of the first VGA. The first and second VGAs each comprise a plurality of parallel gain stages. Gains of the first and second VGAs are equal to the sum of the gains of the activated parallel amplifiers within each corresponding plurality of parallel amplifiers. Each parallel amplifier comprises a parallel differential amplifier controlled by a pair of switches to activate and deactivate the parallel differential amplifier. The gains of the first and second VGAs are increased by activating additional parallel amplifiers. The gains of the first and second VGAs are decreased by deactivating additional parallel amplifiers. The variable gains of the first and second VGAs provide an extended gain control with improved local oscillator (LO) leakage interference rejection.

摘要翻译： 发射机包括耦合到第一VGA的输出的第一可变增益放大器（VGA）和第二VGA。 第一和第二VGA分别包括多个并联增益级。 第一和第二VGA的增益等于每个对应的多个并行放大器内激活的并联放大器的增益之和。 每个并联放大器包括由一对开关控制的并联差分放大器，以激活和去激活并行差分放大器。 通过激活附加的并行放大器来增加第一和第二VGA的增益。 第一和第二VGA的增益通过去激活附加并行放大器而减小。 第一和第二VGA的可变增益提供了具有改进的本地振荡器（LO）泄漏干扰抑制的扩展增益控制。

公开(公告)号：US07299006B1

公开(公告)日：2007-11-20

申请号：US09695715

申请日：2000-10-23

申请人： 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

发明人： 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分类号： H04B7/14

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

摘要： 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.

摘要翻译： 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：US20070229171A1

公开(公告)日：2007-10-04

申请号：US11656490

申请日：2007-01-23

申请人： Meng-An Pan

发明人： Meng-An Pan

IPC分类号： H03F3/68 ,  H03F3/191

CPC分类号： H04B1/0483

摘要： 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.

摘要翻译： 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被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。