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1. 发明授权

US08884702B2 Power amplifier with supply switching 有权
标题翻译：功率放大器，带电源开关
公开(公告)号：US08884702B2
公开(公告)日：2014-11-11
申请号：US13620342
申请日：2012-09-14
申请人： Ali Afsahi , Arya Reza Behzad , Ali Karimi-Sanjaani , Dandan Li , Kyujin Oh , Prasad Sitaram
发明人： Ali Afsahi , Arya Reza Behzad , Ali Karimi-Sanjaani , Dandan Li , Kyujin Oh , Prasad Sitaram
IPC分类号： H03F3/04
CPC分类号： H03F3/45188 , H03F3/245 , H03F2203/45481
摘要： To improve upon efficiency of a transmitter's power amplifier during low power operation, a switching system is used to selectively switch between different (e.g., normal and reduced) power supplies. Suitable hardware/software in the form of circuitry, logic gates, and/or code functions to process, amplify, and transmit an input RF signal and selectively switch IN/OUT a plurality of supply voltages using control logic.
摘要翻译：为了在低功率操作期间提高发射机功率放大器的效率，使用切换系统来选择性地在不同（例如正常和简化的）电源之间切换。以电路，逻辑门和/或代码功能的形式的合适的硬件/软件，用于处理，放大和传输输入RF信号，并使用控制逻辑选择性地切换IN / OUT多个电源电压。

2. 发明授权

US08665931B2 Calibration of communication processing path 失效
标题翻译：通信处理路径的校准
公开(公告)号：US08665931B2
公开(公告)日：2014-03-04
申请号：US13539175
申请日：2012-06-29
申请人： Ali Afsahi , Utku Seckin , Colin Fraser , Navid Lashkarian , Konrad Kratochwil , Arya Reza Behzad , Dengwei Fu
发明人： Ali Afsahi , Utku Seckin , Colin Fraser , Navid Lashkarian , Konrad Kratochwil , Arya Reza Behzad , Dengwei Fu
IPC分类号： H04L5/16
CPC分类号： H03F1/0222 , H03F1/0266 , H03F1/223 , H03F2200/18
摘要： Communication processing paths include distortions, such as DC offset in the baseband analog path, local oscillator feed-through distortion, and nonlinearity of gm's and power amplifiers which are calibrated for, separately or in combination. The cascaded DC offset and nonlinear distortions are modeled separately or in combination using even-and-odd order polynomials. A loopback path from the output of one or more distortion causing devices passes through a measurement and calculation module. The calculation module calculates predistortion polynomial's coefficients which will be stored in a look-up table to be used by a baseband predistorter to calibrate the path. The look-up table is stored locally or remotely.
摘要翻译：通信处理路径包括失真，例如基带模拟路径中的DC偏移，本地振荡器馈通失真以及gm和功率放大器的非线性，其被单独地或组合地校准。级联DC偏移和非线性失真是单独建模的，或者使用偶数和奇数阶多项式组合。来自一个或多个引起失真的设备的输出的回送路径通过测量和计算模块。计算模块计算将被存储在由基带预失真器使用以校准路径的查找表中的预失真多项式系数。查找表存储在本地或远程。

3. 发明申请

US20130109334A1 TRANSMITTER FRONT END WITH PROGRAMMABLE NOTCH FILTER AND METHODS FOR USE THEREWITH 有权
标题翻译：发射机前端与可编程插槽滤波器及其使用方法
公开(公告)号：US20130109334A1
公开(公告)日：2013-05-02
申请号：US13329300
申请日：2011-12-18
申请人： Dae Kwon , Ali Afsahi , Arya Reza Behzad
发明人： Dae Kwon , Ali Afsahi , Arya Reza Behzad
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/34 , H03F3/24 , H04B2001/0433
摘要： A radio transmitter front end for use in a radio frequency (RF) transceiver includes at least one amplifier stage operable to generate a transmit signal in response to an upconverted signal. A feedback generator is operable to generate a transmit feedback signal in response to the transmit signal. A control signal generator is operable to generate at least one filter control signal in response to the transmit feedback signal. A notch filter is operable to filter out of band noise while passing in-band frequencies to the at least one amplifier stage, under control of the at least one filter control signal.
摘要翻译：用于射频（RF）收发器的无线电发射器前端包括至少一个放大器级，用于响应于上变频信号产生发射信号。反馈发生器可操作以响应于发射信号产生发射反馈信号。控制信号发生器可操作以响应于发射反馈信号产生至少一个滤波器控制信号。在所述至少一个滤波器控制信号的控制下，陷波滤波器可操作以滤除带外噪声，同时将带内频率传送到所述至少一个放大器级。

4. 发明授权

US07979042B2 Generating phase shift based on adding two vectors with variable gains 有权
标题翻译：基于添加具有可变增益的两个向量生成相移
公开(公告)号：US07979042B2
公开(公告)日：2011-07-12
申请号：US11967759
申请日：2007-12-31
申请人： Ali Afsahi , Arya Behzad
发明人： Ali Afsahi , Arya Behzad
IPC分类号： H04B1/26
CPC分类号： H04B7/084 , H04B7/10
摘要： A radio frequency (RF) phase shifter having an RC-CR circuit that includes a first capacitor having a first capacitor node and a second capacitor node and a first resistor coupled between the first capacitor node and a ground. The RC-CR circuit also includes a second resistor having a first resistor node and a second resistor node and a second capacitor coupled between the first resistor node and the ground. The RF phase shifter generates arbitrary phase shift by using a scheme of adding two perpendicular vectors with variable gains (or amplitudes).
摘要翻译：一种具有RC-CR电路的射频（RF）移相器，其包括具有第一电容器节点和第二电容器节点的第一电容器和耦合在第一电容器节点和地之间的第一电阻器。 RC-CR电路还包括具有第一电阻器节点和第二电阻器节点的第二电阻器，以及耦合在第一电阻器节点和地之间的第二电容器。 RF移相器通过使用添加具有可变增益（或幅度）的两个垂直向量的方案来产生任意的相移。

5. 发明申请

US20100271128A1 COMPOSITE DIFFERENTIAL RF POWER AMPLIFIER LAYOUT 失效
标题翻译：复合差分射频功率放大器布局
公开(公告)号：US20100271128A1
公开(公告)日：2010-10-28
申请号：US12430654
申请日：2009-04-27
申请人： Ali Afsahi
发明人： Ali Afsahi
IPC分类号： H03F3/45
CPC分类号： H03F3/245 , H03F1/0277 , H03F1/223 , H03F3/195 , H03F3/211 , H03F3/45179 , H03F3/72 , H03F2200/06 , H03F2200/451 , H03F2203/21136 , H03F2203/45302 , H03F2203/45311 , H03F2203/45394 , H03F2203/45618 , H03F2203/45638 , H03F2203/45641 , H03F2203/7215 , H03F2203/7236
摘要： A composite differential Radio Frequency (RF) power amplifier includes a plurality of differential RF cascode power amplifiers coupled in parallel. Each differential RF cascode power amplifier includes a positive transconductance stage and a positive cascode stage coupled in series with the positive transconductance stage between a voltage node and ground. Each also includes a negative transconductance stage and a negative cascode stage coupled in series with the negative transconductance stage between the voltage node and ground. The plurality of parallel differential RF cascode power amplifiers resides adjacent one another in a single semiconductor substrate such that the positive transconductance stage of a first differential RF cascode power amplifier resides adjacent a negative transconductance stage of a second differential RF cascode power amplifier and the positive cascode stage of the first differential RF cascode power amplifier resides adjacent a negative cascode stage of a second differential RF cascode power amplifier.
摘要翻译：复合差分射频（RF）功率放大器包括并联耦合的多个差分RF共源共栅功率放大器。每个差分RF共源共栅功率放大器包括与跨电压级和电压节点之间的正跨导级串联的正跨导级和正级联共栅级。每个还包括负电跨极级和负的共源共栅级，其与电压节点和地之间的负跨导级串联耦合。多个并联差分RF共源共栅功率放大器在单个半导体衬底中彼此相邻地邻接，使得第一差分RF共源共栅功率放大器的正跨导级与第二差分RF共源共栅功率放大器的负跨导级相邻，并且正共型共栅第一差分RF共源共栅功率放大器的级与第二差分RF共源共栅功率放大器的负共源共栅相邻。

6. 发明申请

US20080137772A1 Method and System for Compensating for Estimated Distortion in a Transmitter By Utilizing a Digital Predistortion Scheme With a Single Feedback Mixer 有权
标题翻译：使用单反馈混频器利用数字预失真方案补偿发射机估计失真的方法和系统
公开(公告)号：US20080137772A1
公开(公告)日：2008-06-12
申请号：US11618699
申请日：2006-12-29
申请人： Arya Behzad , Ali Afsahi , Vikram Magoon
发明人： Arya Behzad , Ali Afsahi , Vikram Magoon
IPC分类号： H04L25/03
CPC分类号： H03F1/3247 , H03F1/3294 , H03F2200/336 , H03F2200/57 , H04L27/368
摘要： Aspects of a method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer are presented. Aspects of the system may include at least one circuit that enables generation of an output signal in response to one or more generated input signals. A feedback signal may be generated within a single feedback mixer circuit that may perform a frequency mix-down operation on the generated output signal. The generated feedback signal may be inserted at one or more insertion points in a receiver. Each of the insertion points may be located between a mixer stage of the receiver, and one or more circuits that generate a baseband signal based on the generated feedback signal.
摘要翻译：提出了通过利用具有单个反馈混频器的数字预失真方案来补偿发射机中的估计失真的方法和系统的方面。该系统的方面可以包括响应于一个或多个所生成的输入信号而能够产生输出信号的至少一个电路。可以在可以对所生成的输出信号执行频率混合运算的单个反馈混频器电路内产生反馈信号。产生的反馈信号可以插入接收器中的一个或多个插入点。每个插入点可以位于接收器的混合器级之间，以及基于产生的反馈信号产生基带信号的一个或多个电路。

7. 发明申请

US20080136526A1 Method and System for a Highly Efficient Power Amplifier Utilizing Dynamic Biasing and Predistortion 失效
标题翻译：使用动态偏置和预失真的高效功率放大器的方法和系统
公开(公告)号：US20080136526A1
公开(公告)日：2008-06-12
申请号：US11618877
申请日：2006-12-31
申请人： Arya Behzad , Ali Afsahi , Vikram Magoon
发明人： Arya Behzad , Ali Afsahi , Vikram Magoon
IPC分类号： H03F3/04
CPC分类号： H03F1/3247 , H03F1/3211 , H03F1/3241 , H03F1/3294 , H03F3/45188 , H03F2200/102 , H03F2200/336 , H03F2200/451 , H03F2203/45112 , H03F2203/45244 , H03F2203/45292 , H03F2203/45554 , H04B2001/0425
摘要： Aspects of a method and system for a highly efficient power amplifier (PA) utilizing dynamic biasing and predistortion are presented. Aspects of the system may include a processor that enables computation of a value of a variable bias component of a bias current based on a bias slope value and an amplitude of an envelope input signal. The processor may enable computation of a value of the bias current based on the selected constant bias current component value and the variable bias current component value. A PA may enable generation of an output signal in response to a generated baseband signal by utilizing the bias current to amplify an amplifier input signal. The bias current may be generated based on the envelope input signal. A feedback signal may be generated based on the output signal, which may be used to predistort a subsequent baseband signal.
摘要翻译：提出了一种利用动态偏置和预失真的高效功率放大器（PA）的方法和系统。该系统的方面可以包括能够基于偏置斜率值和包络输入信号的幅度来计算偏置电流的可变偏置分量的值的处理器。该处理器可以使得能够基于所选择的恒定偏置电流分量值和可变偏置电流分量值来计算偏置电流的值。 PA可以通过利用偏置电流来放大放大器输入信号，从而能够响应于产生的基带信号而产生输出信号。可以基于包络输入信号产生偏置电流。可以基于输出信号来生成反馈信号，该输出信号可以用于对随后的基带信号进行预失真。

8. 发明申请

US20070058747A1 Phase shifter and current mode mixer 有权
标题翻译：移相器和电流模式混频器
公开(公告)号：US20070058747A1
公开(公告)日：2007-03-15
申请号：US11224609
申请日：2005-09-12
申请人： Ali Afsahi , Arya Behzad
发明人： Ali Afsahi , Arya Behzad
IPC分类号： H04L27/10 , H04L27/18
CPC分类号： H03D7/1441 , H03D7/1458 , H03D2200/0025 , H03D2200/0084 , H04L27/2647
摘要： An integrated circuit radio transceiver comprises an integrated phase shift mixer for generating a phase and frequency shifted output signal to at least a portion of one of a transmitter or receiver front end. The integrated phase shift mixer includes a phase shift block that is operable to produce a phase shifted current signal at an output of the phase shift block and a mixer that is operable to produce the phase and frequency shifted output signal based upon the phase shifted current signal. One aspect of the present invention is that the phase shift block produces an output as a current signal and the mixer block is operably disposed and formed to receive the current signal produced by the phase shift block. Thus, the mixer includes a folded cascode mixer that provides a substantially low input impedance.
摘要翻译：集成电路无线电收发器包括集成相移混频器，用于产生到发射机或接收机前端中的至少一部分的相位和频移输出信号。集成相移混频器包括相移块，其可操作以在相移块的输出处产生相移电流信号，以及混频器，其可操作以基于相移电流信号产生相位和频移输出信号。本发明的一个方面是相移块产生作为电流信号的输出，并且混合器块可操作地设置和形成以接收由相移块产生的电流信号。因此，混频器包括提供基本上低的输入阻抗的折叠共源共栅混合器。

9. 发明申请

US20060229042A1 Method and apparatus for generating arbitrary phase shift using a phase shifter based on adding two perpendicular vectors with variable gains 失效
标题翻译：基于添加具有可变增益的两个垂直向量，使用移相器产生任意相移的方法和装置
公开(公告)号：US20060229042A1
公开(公告)日：2006-10-12
申请号：US11102515
申请日：2005-04-08
申请人： Ali Afsahi , Arya Behzad
发明人： Ali Afsahi , Arya Behzad
IPC分类号： H04B1/06 , H04B7/00
CPC分类号： H04B7/084 , H04B7/10
摘要： A radio frequency (RF) phase shifter having an RC-CR circuit that includes a first capacitor having a first capacitor node and a second capacitor node and a first resistor coupled between the first capacitor node and a ground. The RC-CR circuit also includes a second resistor having a first resistor node and a second resistor node and a second capacitor coupled between the first resistor node and the ground. The RF phase shifter generates arbitrary phase shift by using a scheme of adding two perpendicular vectors with variable gains (or amplitudes).
摘要翻译：一种具有RC-CR电路的射频（RF）移相器，其包括具有第一电容器节点和第二电容器节点的第一电容器和耦合在第一电容器节点和地之间的第一电阻器。 RC-CR电路还包括具有第一电阻器节点和第二电阻器节点的第二电阻器，以及耦合在第一电阻器节点和地之间的第二电容器。 RF移相器通过使用添加具有可变增益（或幅度）的两个垂直向量的方案来产生任意的相移。

10. 发明申请

US20140079096A1 POWER AMPLIFIER WITH SUPPLY SWITCHING 有权
标题翻译：带电源开关的功率放大器
公开(公告)号：US20140079096A1
公开(公告)日：2014-03-20
申请号：US13620342
申请日：2012-09-14
申请人： Ali Afsahi , Arya Reza Behzad , Ali Karimi-Sanjaani , Dandan Li , Kyujin Oh , Prasad Sitaram
发明人： Ali Afsahi , Arya Reza Behzad , Ali Karimi-Sanjaani , Dandan Li , Kyujin Oh , Prasad Sitaram
IPC分类号： H04B1/38 , H04L27/06 , H03F3/21
CPC分类号： H03F3/45188 , H03F3/245 , H03F2203/45481
摘要： To improve upon efficiency of a transmitter's power amplifier during low power operation, a switching system is used to selectively switch between different (e.g., normal and reduced) power supplies. Suitable hardware/software in the form of circuitry, logic gates, and/or code functions to process, amplify, and transmit an input RF signal and selectively switch IN/OUT a plurality of supply voltages using control logic.
摘要翻译：为了在低功率操作期间提高发射机功率放大器的效率，使用切换系统来选择性地在不同（例如正常和简化的）电源之间切换。以电路，逻辑门和/或代码功能的形式的合适的硬件/软件，用于处理，放大和传输输入RF信号，并使用控制逻辑选择性地切换IN / OUT多个电源电压。

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