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1. 发明授权

US08587377B2 Apparatus and methods for biasing a power amplifier 有权
标题翻译：用于偏置功率放大器的装置和方法
公开(公告)号：US08587377B2
公开(公告)日：2013-11-19
申请号：US13309349
申请日：2011-12-01
申请人： Sabah Khesbak , San Chin
发明人： Sabah Khesbak , San Chin
IPC分类号： H03G3/30
CPC分类号： H03F1/0222 , H03F3/245 , H03F2200/102 , H03F2200/18 , H03F2200/504
摘要： Apparatus and methods for biasing a power amplifier are disclosed. In one embodiment, a power amplifier system includes a power amplifier configured to amplify a radio frequency (RF) signal and a bias control circuit for generating a bias current for the power amplifier. The bias control circuit is configured to receive an envelope of the RF signal and to change an amplitude of the bias current based at least in part on the envelope.
摘要翻译：公开了用于偏置功率放大器的装置和方法。在一个实施例中，功率放大器系统包括被配置为放大射频（RF）信号的功率放大器和用于产生功率放大器的偏置电流的偏置控制电路。偏置控制电路被配置为接收RF信号的包络并且至少部分地基于包络来改变偏置电流的幅度。

2. 发明申请

US20120146734A1 APPARATUS AND METHODS FOR BIASING A POWER AMPLIFIER 有权
标题翻译：放大功率放大器的装置和方法
公开(公告)号：US20120146734A1
公开(公告)日：2012-06-14
申请号：US13309349
申请日：2011-12-01
申请人： Sabah KHESBAK , San Chin
发明人： Sabah KHESBAK , San Chin
IPC分类号： H03F3/04
CPC分类号： H03F1/0222 , H03F3/245 , H03F2200/102 , H03F2200/18 , H03F2200/504
摘要： Apparatus and methods for biasing a power amplifier are disclosed. In one embodiment, a power amplifier system includes a power amplifier configured to amplify a radio frequency (RF) signal and a bias control circuit for generating a bias current for the power amplifier. The bias control circuit is configured to receive an envelope of the RF signal and to change an amplitude of the bias current based at least in part on the envelope.
摘要翻译：公开了用于偏置功率放大器的装置和方法。在一个实施例中，功率放大器系统包括被配置为放大射频（RF）信号的功率放大器和用于产生功率放大器的偏置电流的偏置控制电路。偏置控制电路被配置为接收RF信号的包络并且至少部分地基于包络来改变偏置电流的幅度。

3. 发明授权

US08598950B2 Apparatus and methods for capacitive load reduction 有权
标题翻译：用于容性负载降低的装置和方法
公开(公告)号：US08598950B2
公开(公告)日：2013-12-03
申请号：US13323503
申请日：2011-12-12
申请人： Sabah Khesbak
发明人： Sabah Khesbak
IPC分类号： H03F1/14
CPC分类号： H03F1/0222 , H03F1/0211 , H03F1/0227 , H03F1/0277 , H03F1/0288 , H03F1/07 , H03F1/305 , H03F1/56 , H03F3/19 , H03F3/193 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/68 , H03F3/72 , H03F2200/102 , H03F2200/18 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/411 , H03F2200/429 , H03F2200/432 , H03F2200/451 , H03F2200/504 , H03F2200/516 , H03F2203/21106 , H03F2203/7209 , H03F2203/7221 , H03F2203/7236
摘要： Apparatus and methods for capacitive load reduction are disclosed. In one embodiment, a power amplifier system includes a plurality of power amplifiers and an envelope tracking module for generating a supply voltage for the power amplifiers. The power amplifier system further includes a switch and a decoupling capacitor operatively associated with a first power amplifier of the system. The switch is configured to electrically float an end of the decoupling capacitor when the first power amplifier is disabled so as to reduce capacitive loading of the envelope tracker and to operate as a dampening resistor when the power amplifier is enabled so as to improve the stability of the system.
摘要翻译：公开了用于容性负载降低的装置和方法。在一个实施例中，功率放大器系统包括多个功率放大器和用于产生功率放大器的电源电压的包络跟踪模块。功率放大器系统还包括与系统的第一功率放大器可操作地相关联的开关和去耦电容器。该开关被配置为在禁用第一功率放大器时电浮动去耦电容器的一端，以便降低包络跟踪器的容性负载并且当功率放大器被使能时用作阻尼电阻器，以便提高稳定性系统。

4. 发明授权

US08989682B2 Apparatus and methods for envelope tracking calibration 有权
标题翻译：用于包络跟踪校准的装置和方法
公开(公告)号：US08989682B2
公开(公告)日：2015-03-24
申请号：US13367190
申请日：2012-02-06
申请人： David Steven Ripley , Sabah Khesbak , Benjamin Bartram , Kevin Lee Cobley , Robert Astle Henshaw , Julian Hildersley , Robert John Thompson
发明人： David Steven Ripley , Sabah Khesbak , Benjamin Bartram , Kevin Lee Cobley , Robert Astle Henshaw , Julian Hildersley , Robert John Thompson
IPC分类号： H01Q11/12 , H03F1/02 , H03F3/19 , H03F3/24 , H03G3/30
CPC分类号： H04B17/13 , H03F1/0211 , H03F1/0216 , H03F1/0222 , H03F1/0227 , H03F1/025 , H03F1/30 , H03F1/301 , H03F1/32 , H03F1/56 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/211 , H03F3/245 , H03F3/68 , H03F3/72 , H03F2200/102 , H03F2200/108 , H03F2200/111 , H03F2200/15 , H03F2200/387 , H03F2200/405 , H03F2200/429 , H03F2200/451 , H03F2200/462 , H03F2200/465 , H03F2200/471 , H03F2200/507 , H03F2200/511 , H03F2203/21106 , H03G3/30 , H03G3/3036 , H03G3/3042 , H04B1/40 , H04W88/02
摘要： Apparatus and methods for envelope tracking calibration are provided. In one embodiment, a method of calibrating an envelope tracker having an envelope shaping table generated at a desired gain compression of a power amplifier is provided. The method includes generating a supply voltage for the power amplifier using the envelope tracker, operating the supply voltage of the power amplifier at a first voltage level associated with substantially no gain compression of the power amplifier, and measuring an output power of the power amplifier at the first voltage level. The method further includes decreasing a voltage level of the supply voltage one or more times and measuring the output power at each voltage level, determining a second voltage level of the power amplifier associated with a gain compression equal to about that of the desired gain compression, and calibrating the envelope tracker based on the determination.
摘要翻译：提供用于包络跟踪校准的装置和方法。在一个实施例中，提供了一种校准具有在功率放大器的期望增益压缩下产生的包络整形表的包络跟踪器的方法。该方法包括使用包络跟踪器产生用于功率放大器的电源电压，在与功率放大器基本上没有增益压缩相关联的第一电压电平下操作功率放大器的电源电压，以及测量功率放大器的输出功率第一个电压电平。该方法还包括：将电源电压的电压电平降低一次或多次并测量每个电压电平处的输出功率，确定与等于期望增益压缩的增益压缩相关联的增益压缩相关联的功率放大器的第二电压电平，并根据确定校准包络跟踪器。

5. 发明授权

US08718188B2 Apparatus and methods for envelope tracking 有权
标题翻译：用于包络跟踪的装置和方法
公开(公告)号：US08718188B2
公开(公告)日：2014-05-06
申请号：US13452620
申请日：2012-04-20
申请人： Florinel G. Balteanu , Sabah Khesbak , Yevgeniy A. Tkachenko , David Steven Ripley , Robert John Thompson
发明人： Florinel G. Balteanu , Sabah Khesbak , Yevgeniy A. Tkachenko , David Steven Ripley , Robert John Thompson
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H03F1/0205 , H03F1/02 , H03F1/0211 , H03F1/0227 , H03F1/0244 , H03F1/302 , H03F1/56 , H03F3/19 , H03F3/21 , H03F3/211 , H03F3/24 , H03F3/245 , H03F3/72 , H03F2200/102 , H03F2200/108 , H03F2200/111 , H03F2200/294 , H03F2200/336 , H03F2200/387 , H03F2200/414 , H03F2200/417 , H03F2200/451 , H03F2200/504 , H03F2200/555 , H03F2203/21106 , H03F2203/7221 , H04B1/04 , H04B1/0475 , H04B2001/0416 , H04B2001/045
摘要： Apparatus and methods for envelope tracking are disclosed. In one embodiment, a power amplifier system including a power amplifier and an envelope tracker is provided. The power amplifier is configured to amplify a radio frequency (RF) signal, and the envelope tracker is configured to control a supply voltage of the power amplifier using an envelope of the RF signal. The envelope tracker includes a buck converter for generating a buck voltage from a battery voltage and a digital-to-analog conversion (DAC) module for adjusting the buck voltage based on the envelope of the RF signal to generate the supply voltage for the power amplifier.
摘要翻译：公开了用于包络跟踪的装置和方法。在一个实施例中，提供了包括功率放大器和外壳跟踪器的功率放大器系统。功率放大器被配置为放大射频（RF）信号，并且包络跟踪器被配置为使用RF信号的包络来控制功率放大器的电源电压。信封跟踪器包括用于从电池电压产生降压电压的降压转换器和用于基于RF信号的包络调整降压电压的数模转换（DAC）模块，以产生功率放大器的电源电压。

6. 发明申请

US20120200354A1 APPARATUS AND METHODS FOR ENVELOPE TRACKING CALIBRATION 有权
标题翻译：用于包围跟踪校准的装置和方法
公开(公告)号：US20120200354A1
公开(公告)日：2012-08-09
申请号：US13367190
申请日：2012-02-06
申请人： David Steven Ripley , Sabah Khesbak , Benjamin Bartram , Kevin Lee Cobley , Robert Astle Henshaw , Julian Hildersley , Robert John Thompson
发明人： David Steven Ripley , Sabah Khesbak , Benjamin Bartram , Kevin Lee Cobley , Robert Astle Henshaw , Julian Hildersley , Robert John Thompson
IPC分类号： H03G3/20
CPC分类号： H04B17/13 , H03F1/0211 , H03F1/0216 , H03F1/0222 , H03F1/0227 , H03F1/025 , H03F1/30 , H03F1/301 , H03F1/32 , H03F1/56 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/211 , H03F3/245 , H03F3/68 , H03F3/72 , H03F2200/102 , H03F2200/108 , H03F2200/111 , H03F2200/15 , H03F2200/387 , H03F2200/405 , H03F2200/429 , H03F2200/451 , H03F2200/462 , H03F2200/465 , H03F2200/471 , H03F2200/507 , H03F2200/511 , H03F2203/21106 , H03G3/30 , H03G3/3036 , H03G3/3042 , H04B1/40 , H04W88/02
摘要： Apparatus and methods for envelope tracking calibration are provided. In one embodiment, a method of calibrating an envelope tracker having an envelope shaping table generated at a desired gain compression of a power amplifier is provided. The method includes generating a supply voltage for the power amplifier using the envelope tracker, operating the supply voltage of the power amplifier at a first voltage level associated with substantially no gain compression of the power amplifier, and measuring an output power of the power amplifier at the first voltage level. The method further includes decreasing a voltage level of the supply voltage one or more times and measuring the output power at each voltage level, determining a second voltage level of the power amplifier associated with a gain compression equal to about that of the desired gain compression, and calibrating the envelope tracker based on the determination.
摘要翻译：提供用于包络跟踪校准的装置和方法。在一个实施例中，提供了一种校准具有在功率放大器的期望增益压缩下产生的包络整形表的包络跟踪器的方法。该方法包括使用包络跟踪器产生用于功率放大器的电源电压，在与功率放大器基本上没有增益压缩相关联的第一电压电平下操作功率放大器的电源电压，以及测量功率放大器的输出功率第一个电压电平。该方法还包括：将电源电压的电压电平降低一次或多次并测量每个电压电平处的输出功率，确定与等于期望增益压缩的增益压缩相关联的增益压缩相关联的功率放大器的第二电压电平，并根据确定校准包络跟踪器。

7. 发明授权

US06542029B1 Variable-slope variable-gain amplifier 有权
标题翻译：可变斜率可变增益放大器
公开(公告)号：US06542029B1
公开(公告)日：2003-04-01
申请号：US09686669
申请日：2000-10-11
申请人： Sabah Khesbak , Madhukar Reddy
发明人： Sabah Khesbak , Madhukar Reddy
IPC分类号： H03G320
CPC分类号： H03G3/3036
摘要： A system for varying output power of variable-gain amplifiers (VGA) allows for varying the output power transfer function, thus varying the gain, and, hence, the resolution of the output power of the VGA. The preferred embodiment comprises a variable-slope VGA (VSVGA) circuit configured to operate within a closed-loop power-controlled CDMA handset. The VSVGA circuit manipulates the input control voltage of the VGA, thereby, adjusting the gain of the amplifier by varying the slope of a line which models the amplifier output transfer function. Varying gain of the VGA provides for a varying resolution in the VGA amplifier output transfer function. This variation allows for compatibility of a single CDMA handset with different industry standards.
摘要翻译：用于改变可变增益放大器（VGA）的输出功率的系统允许改变输出功率传递函数，从而改变增益，并因此改变VGA的输出功率的分辨率。优选实施例包括可变斜率VGA（VSVGA）电路，其被配置为在闭环功率控制的CDMA手持机内操作。 VSVGA电路操纵VGA的输入控制电压，从而通过改变对放大器输出传递函数建模的线的斜率来调节放大器的增益。 VGA的不同增益提供了VGA放大器输出传递功能的不同分辨率。这种变化允许单个CDMA手机与不同行业标准的兼容性。

8. 发明申请

US20120269240A1 APPARATUS AND METHODS FOR ENVELOPE TRACKING 有权
标题翻译：用于包围跟踪的装置和方法
公开(公告)号：US20120269240A1
公开(公告)日：2012-10-25
申请号：US13452620
申请日：2012-04-20
申请人： Florinel G. Balteanu , Sabah Khesbak , Yevgeniy A. Tkachenko , David Steven Ripley , Robert John Thompson
发明人： Florinel G. Balteanu , Sabah Khesbak , Yevgeniy A. Tkachenko , David Steven Ripley , Robert John Thompson
IPC分类号： H04B15/00 , H04B1/38 , H04B1/04
CPC分类号： H03F1/0205 , H03F1/02 , H03F1/0211 , H03F1/0227 , H03F1/0244 , H03F1/302 , H03F1/56 , H03F3/19 , H03F3/21 , H03F3/211 , H03F3/24 , H03F3/245 , H03F3/72 , H03F2200/102 , H03F2200/108 , H03F2200/111 , H03F2200/294 , H03F2200/336 , H03F2200/387 , H03F2200/414 , H03F2200/417 , H03F2200/451 , H03F2200/504 , H03F2200/555 , H03F2203/21106 , H03F2203/7221 , H04B1/04 , H04B1/0475 , H04B2001/0416 , H04B2001/045
摘要： Apparatus and methods for envelope tracking are disclosed. In one embodiment, a power amplifier system including a power amplifier and an envelope tracker is provided. The power amplifier is configured to amplify a radio frequency (RF) signal, and the envelope tracker is configured to control a supply voltage of the power amplifier using an envelope of the RF signal. The envelope tracker includes a buck converter for generating a buck voltage from a battery voltage and a digital-to-analog conversion (DAC) module for adjusting the buck voltage based on the envelope of the RF signal to generate the supply voltage for the power amplifier.
摘要翻译：公开了用于包络跟踪的装置和方法。在一个实施例中，提供了包括功率放大器和外壳跟踪器的功率放大器系统。功率放大器被配置为放大射频（RF）信号，并且包络跟踪器被配置为使用RF信号的包络来控制功率放大器的电源电压。信封跟踪器包括用于从电池电压产生降压电压的降压转换器和用于基于RF信号的包络调整降压电压的数模转换（DAC）模块，以产生功率放大器的电源电压。

9. 发明申请

US20120146731A1 APPARATUS AND METHODS FOR CAPACITIVE LOAD REDUCTION 有权
标题翻译：用于电容负载减少的装置和方法
公开(公告)号：US20120146731A1
公开(公告)日：2012-06-14
申请号：US13323503
申请日：2011-12-12
申请人： SABAH KHESBAK
发明人： SABAH KHESBAK
IPC分类号： H03F3/68 , H03F3/16
CPC分类号： H03F1/0222 , H03F1/0211 , H03F1/0227 , H03F1/0277 , H03F1/0288 , H03F1/07 , H03F1/305 , H03F1/56 , H03F3/19 , H03F3/193 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/68 , H03F3/72 , H03F2200/102 , H03F2200/18 , H03F2200/222 , H03F2200/318 , H03F2200/387 , H03F2200/411 , H03F2200/429 , H03F2200/432 , H03F2200/451 , H03F2200/504 , H03F2200/516 , H03F2203/21106 , H03F2203/7209 , H03F2203/7221 , H03F2203/7236
摘要： Apparatus and methods for capacitive load reduction are disclosed. In one embodiment, a power amplifier system includes a plurality of power amplifiers and an envelope tracking module for generating a supply voltage for the power amplifiers. The power amplifier system further includes a switch and a decoupling capacitor operatively associated with a first power amplifier of the system. The switch is configured to electrically float an end of the decoupling capacitor when the first power amplifier is disabled so as to reduce capacitive loading of the envelope tracker and to operate as a dampening resistor when the power amplifier is enabled so as to improve the stability of the system.
摘要翻译：公开了用于容性负载降低的装置和方法。在一个实施例中，功率放大器系统包括多个功率放大器和用于产生功率放大器的电源电压的包络跟踪模块。功率放大器系统还包括与系统的第一功率放大器可操作地相关联的开关和去耦电容器。该开关被配置为在禁用第一功率放大器时电浮动去耦电容器的一端，以便降低包络跟踪器的容性负载并且当功率放大器被使能时用作阻尼电阻器，以便提高稳定性系统。

10. 发明授权

US06339361B1 Power amplifier driver system for wireless handset 有权
标题翻译：无线手机的功率放大器驱动系统
公开(公告)号：US06339361B1
公开(公告)日：2002-01-15
申请号：US09328927
申请日：1999-06-09
申请人： Sabah Khesbak , Madhukar Reddy , Pramote Piriyapoksombut , Trevor Robinson
发明人： Sabah Khesbak , Madhukar Reddy , Pramote Piriyapoksombut , Trevor Robinson
IPC分类号： H03G310
CPC分类号： H03G3/3042 , H03F1/0261 , H03F1/302
摘要： A driver system for a power amplifier in a wireless communication handset. The driver system includes a driver and a current source. The driver drives the power amplifier at a level of linearity determined responsive to a variable input bias current provided by the current source. The current source varies the bias current, and thus the degree of linearity provided, responsive to the desired output power of the handset.
摘要翻译：一种用于无线通信手机中的功率放大器的驱动器系统。驱动器系统包括驱动器和电流源。驱动器以响应于由电流源提供的可变输入偏置电流确定的线性度驱动功率放大器。电流源根据手机所需的输出功率改变偏置电流，从而提供线性度。

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