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1. 发明授权

US07786807B1 Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages 有权
标题翻译： Cascode CMOS射频功率放大器，具有可编程的反馈共源共栅偏置电压
公开(公告)号：US07786807B1
公开(公告)日：2010-08-31
申请号：US12428616
申请日：2009-04-23
申请人： Mingyuan Li , Ali Afsahi , Arya Reza Behzad
发明人： Mingyuan Li , Ali Afsahi , Arya Reza Behzad
IPC分类号： H03F3/04
CPC分类号： H03F1/0261 , H03F1/0244 , H03F1/0272 , H03F1/223 , H03F3/193 , H03F2200/61
摘要： A Radio Frequency (RF) cascode power amplifier operates with differing battery supply voltages. A transconductance stage has a transistor with an RF signal input at its gate. A cascode stage has at least one cascode transistor, the cascode stage coupled in series with the transconductance stage between a battery voltage node and ground, the cascode stage having an RF signal output at the battery voltage node and at least one bias input to the at least one cascode transistor. Cascode bias feedback circuitry applies fixed bias voltage(s) to the at least one two bias inputs for a low battery voltage and applies feedback bias voltage(s) to the at least two bias inputs for a high battery voltage, the feedback bias voltage(s) based upon a voltage of the battery voltage node. More than two differing battery supply voltages are supported.
摘要翻译：射频（RF）共源共栅功率放大器以不同的电池电压工作。跨导级具有在其栅极处输入RF信号的晶体管。共源共栅级具有至少一个共源共栅晶体管，所述共源共栅级与电池电压节点和地之间的跨导级串联耦合，所述共源共栅级在电池电压节点处具有RF信号输出和至少一个偏置输入到至少一个共源共栅晶体管。串联偏压反馈电路为低电池电压向至少一个两个偏置输入端施加固定偏置电压，并且对于高电池电压将反馈偏置电压施加到至少两个偏置输入端，反馈偏置电压（ s）基于电池电压节点的电压。支持两种不同的电池电源电压。

2. 发明授权

US07545855B2 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：US07545855B2
公开(公告)日：2009-06-09
申请号：US11224609
申请日：2005-09-12
申请人： Ali Afsahi , Arya Reza Behzad
发明人： Ali Afsahi , Arya Reza Behzad
IPC分类号： H04B1/38
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之一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。

3. 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。

4. 发明申请

US20130287076A1 CALIBRATION OF COMMUNICATION PROCESSING PATH 失效
标题翻译：通信处理路径校准
公开(公告)号：US20130287076A1
公开(公告)日：2013-10-31
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： H04B15/00 , H04L25/49
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。

5. 发明授权

US08063706B2 Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages 有权
标题翻译： Cascode CMOS射频功率放大器，具有可编程的反馈共源共栅偏置电压
公开(公告)号：US08063706B2
公开(公告)日：2011-11-22
申请号：US12860905
申请日：2010-08-22
申请人： Mingyuan Li , Ali Afsahi , Arya Reza Behzad
发明人： Mingyuan Li , Ali Afsahi , Arya Reza Behzad
IPC分类号： H03F3/04
CPC分类号： H03F1/0261 , H03F1/0244 , H03F1/0272 , H03F1/223 , H03F3/193 , H03F2200/61
摘要： A Radio Frequency (RF) cascode power amplifier operates with differing battery supply voltages. A transconductance stage has a transistor with an RF signal input at its gate. A cascode stage has at least one cascode transistor, the cascode stage coupled in series with the transconductance stage between a battery voltage node and ground, the cascode stage having an RF signal output at the battery voltage node and at least one bias input to the at least one cascode transistor. Cascode bias feedback circuitry applies fixed bias voltage(s) to the at least one two bias inputs for a low battery voltage and applies feedback bias voltage(s) to the at least two bias inputs for a high battery voltage, the feedback bias voltage(s) based upon a voltage of the battery voltage node. More than two differing battery supply voltages are supported.
摘要翻译：射频（RF）共源共栅功率放大器以不同的电池电压工作。跨导级具有在其栅极处输入RF信号的晶体管。共源共栅级具有至少一个共源共栅晶体管，所述共源共栅级与电池电压节点和地之间的跨导级串联耦合，所述共源共栅级在电池电压节点处具有RF信号输出和至少一个偏置输入到至少一个共源共栅晶体管。串联偏压反馈电路为低电池电压向至少一个两个偏置输入端施加固定偏置电压，并且对于高电池电压将反馈偏置电压施加到至少两个偏置输入端，反馈偏置电压（ s）基于电池电压节点的电压。支持两种不同的电池电源电压。

6. 发明授权

US07545856B2 Current mode phase shifter, mixer and amplifier 有权
标题翻译：电流模式移相器，混频器和放大器
公开(公告)号：US07545856B2
公开(公告)日：2009-06-09
申请号：US11224610
申请日：2005-09-12
申请人： Arya Reza Behzad , Ali Afsahi
发明人： Arya Reza Behzad , Ali Afsahi
IPC分类号： H04B1/38
CPC分类号： H04L27/0008 , H03F1/34 , H03F3/24 , H03F3/45188 , H03F3/45475 , H03F2200/294 , H03F2200/91 , H03F2203/45522 , H03F2203/45592 , H03H11/20 , H04B2001/0433 , H04L27/206 , H04L27/362
摘要： An integrated circuit radio transceiver 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 with a low input impedance that is operable to produce a phase and frequency shifted output current 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. Similarly, an operational amplifier configured in a low input impedance mode is provided to receive and amplify a current signal mixer output, all to maximize signal processing head room reduce circuit noise and improve linearity.
摘要翻译：集成电路无线电收发机包括相移块，其可操作以在相移块的输出处产生相移电流信号，以及具有低输入阻抗的混频器，其可操作以产生基于相位和频移的输出电流信号相移电流信号。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。类似地，以低输入阻抗模式配置的运算放大器被提供以接收和放大当前信号混频器输出，所有这些都使信号处理最大化房间减小电路噪声并提高线性度。

7. 发明申请

US20130109325A1 DUAL MODE LOCAL AREA NETWORK TRANSCEIVER AND METHODS FOR USE THEREWITH 审中-公开
标题翻译：双模局域网收发器及其使用方法
公开(公告)号：US20130109325A1
公开(公告)日：2013-05-02
申请号：US13329297
申请日：2011-12-18
申请人： Ali Afsahi , Arya Reza Behzad
发明人： Ali Afsahi , Arya Reza Behzad
IPC分类号： H04B1/38
CPC分类号： H04B7/0689 , H04B17/13
摘要： A radio frequency (RF) section of an RF transceiver is coupled to an antenna structure that includes a plurality of antennas. The RF section includes a configuration controller operable to generate a control signal that selectively indicates a non-contiguous state in a non-contiguous mode of operation of the RF transceiver and a multi-input multi-output (MIMO) state in a MIMO mode of operation of the RF transceiver.
摘要翻译： RF收发器的射频（RF）部分耦合到包括多个天线的天线结构。 RF部分包括配置控制器，其可操作以产生选择性地指示RF收发器的非连续操作模式中的非连续状态的控制信号和MIMO模式中的多输入多输出（MIMO）状态 RF收发器的操作。

8. 发明申请

US20100271135A1 CMOS RF POWER AMPLIFIER WITH LDMOS BIAS CIRCUIT FOR LARGE SUPPLY VOLTAGES 有权
标题翻译：具有LDMOS偏置电路的CMOS RF功率放大器，用于大电源电压
公开(公告)号：US20100271135A1
公开(公告)日：2010-10-28
申请号：US12430645
申请日：2009-04-27
申请人： Ali Afsahi , Arya Reza Behzad , Vijay Ramachandra Reddy
发明人： Ali Afsahi , Arya Reza Behzad , Vijay Ramachandra Reddy
IPC分类号： H03F3/04
CPC分类号： H03F1/223 , H03F1/0261 , H03F1/52 , H03F3/195 , H03F3/24 , H03F2200/18
摘要： Bias circuitry that may be used within a communications or other device includes a first current mirror having first and second transistors with sources coupled to ground and operable to receive a reference current at a drain of first transistor. A second current mirror has first and second transistors with drains coupled to a battery voltage supply. A third current mirror has first and second transistors with drains coupled to sources of the first and second transistors of the second current mirror, respectively. A biasing transistor couples between the second transistor of the first current mirror and the first transistor of the third current mirror and operable to receive a tuning input voltage at its gate. A resistive element coupled between the second transistor of the third current mirror and ground produces a bias voltage produced at a connection of the resistive element and the second transistor of the third current mirror.
摘要翻译：可以在通信或其他设备中使用的偏置电路包括具有第一和第二晶体管的第一电流镜，其具有耦合到地的源和可操作以在第一晶体管的漏极处接收参考电流。第二电流镜具有第一和第二晶体管，漏极耦合到电池电压源。第三电流镜具有第一和第二晶体管，漏极分别耦合到第二电流镜的第一和第二晶体管的源极。偏置晶体管耦合在第一电流镜的第二晶体管和第三电流镜的第一晶体管之间，并且可操作以在其栅极处接收调谐输入电压。耦合在第三电流镜的第二晶体管和地之间的电阻元件产生在电阻元件和第三电流镜的第二晶体管的连接处产生的偏置电压。

9. 发明授权

US09065504B2 Transmitter front end with programmable notch filter and methods for use therewith 有权
标题翻译：变送器前端带可编程陷波滤波器及其使用方法
公开(公告)号：US09065504B2
公开(公告)日：2015-06-23
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。

10. 发明授权

US08072270B2 CMOS RF power amplifier with LDMOS bias circuit for large supply voltages 有权
标题翻译： CMOS射频功率放大器，具有LDMOS偏置电路，适用于大电源电压
公开(公告)号：US08072270B2
公开(公告)日：2011-12-06
申请号：US12430645
申请日：2009-04-27
申请人： Ali Afsahi , Arya Reza Behzad , Vijay Ramachandra Reddy
发明人： Ali Afsahi , Arya Reza Behzad , Vijay Ramachandra Reddy
IPC分类号： H03F3/04
CPC分类号： H03F1/223 , H03F1/0261 , H03F1/52 , H03F3/195 , H03F3/24 , H03F2200/18
摘要： Bias circuitry that may be used within a communications or other device includes a first current mirror having first and second transistors with sources coupled to ground and operable to receive a reference current at a drain of first transistor. A second current mirror has first and second transistors with drains coupled to a battery voltage supply. A third current mirror has first and second transistors with drains coupled to sources of the first and second transistors of the second current mirror, respectively. A biasing transistor couples between the second transistor of the first current mirror and the first transistor of the third current mirror and operable to receive a tuning input voltage at its gate. A resistive element coupled between the second transistor of the third current mirror and ground produces a bias voltage produced at a connection of the resistive element and the second transistor of the third current mirror.
摘要翻译：可以在通信或其他设备中使用的偏置电路包括具有第一和第二晶体管的第一电流镜，其具有耦合到地的源和可操作以在第一晶体管的漏极处接收参考电流。第二电流镜具有第一和第二晶体管，漏极耦合到电池电压源。第三电流镜具有第一和第二晶体管，漏极分别耦合到第二电流镜的第一和第二晶体管的源极。偏置晶体管耦合在第一电流镜的第二晶体管和第三电流镜的第一晶体管之间，并且可操作以在其栅极处接收调谐输入电压。耦合在第三电流镜的第二晶体管和地之间的电阻元件产生在电阻元件和第三电流镜的第二晶体管的连接处产生的偏置电压。

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