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公开(公告)号：US08768273B2
公开(公告)日：2014-07-01
申请号：US13328518
申请日：2011-12-16
申请人： Dmitriy Rozenblit , Masoud Kahrizi
发明人： Dmitriy Rozenblit , Masoud Kahrizi
IPC分类号： H04B1/04
CPC分类号： H04W52/52 , H04B17/101 , H04B17/102 , H04B17/103
摘要： Systems and methods are provided for detecting forward power sent to an antenna and reflected power reflected back from the antenna. Embodiments of the present invention provide systems and methods for measuring forward and reflected power and controlling the amount of power supplied to the antenna responsive to these measurements. Embodiments of the present invention enable the power sent to the antenna to be dynamically altered when antenna impendence changes (e.g., when the antenna gets too close to another object).
摘要翻译： 提供了用于检测发送到天线的正向功率和从天线反射回的反射功率的系统和方法。 本发明的实施例提供了用于测量前向和反射功率并根据这些测量来控制提供给天线的功率量的系统和方法。 当天线阻抗改变时（例如，当天线太靠近另一个物体时），本发明的实施例使能发送到天线的功率被动态地改变。
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公开(公告)号：US08451960B2
公开(公告)日：2013-05-28
申请号：US12771559
申请日：2010-04-30
IPC分类号： H04L27/08
CPC分类号： H04W52/12 , H03G3/001 , H03G3/3089 , H04B2001/0416
摘要： Embodiments provide improved systems and methods of gain control and calibration for wireless transmitters. In particular, embodiments allow linear gain control over the entire transmitter gain control range, independent of temperature/process variations. Embodiments require very low power consumption compared to existing approaches. Embodiments may also be used for gain control calibration during production time, thereby substantially reducing production calibration time and cost.
摘要翻译： 实施例提供了用于无线发射机的增强控制和校准的改进的系统和方法。 特别地，实施例允许在整个发射机增益控制范围内的线性增益控制，与温度/过程变化无关。 与现有方法相比，实施例需要非常低的功耗。 实施例也可用于在生产时间期间的增益控制校准，从而大大减少生产校准时间和成本。
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3.发明申请Transmitter architecture enabling efficient preamplification gain control and related method 审中-公开发射机架构，可实现高效的前置放大增益控制和相关方法公开(公告)号：US20110306391A1
公开(公告)日：2011-12-15
申请号：US12802603
申请日：2010-06-09
IPC分类号： H04W52/04
CPC分类号： H03G3/3042
摘要： According to one embodiment, a radio frequency (RF) transceiver includes a transmitter enabling efficient preamplification gain control. The RF transceiver comprises a receiver and a power amplifier (PA) for amplifying a transmit signal of the transmitter. The transmitter is configured to provide pre-PA gain control for preamplifying the transmit signal before amplification by the PA, wherein substantially all of the pre-PA gain control is provided when the transmit signal is at a transmit frequency of the transmitter. In one embodiment, the transmitter includes a PA driver comprising in combination: a transconductance amplifier, a current steering block, and an output transformer. Each of the transconductance amplifier, current steering block, and output transformer is configured to contribute a respective variable gain control to the pre-PA gain control provided by the PA driver.
摘要翻译： 根据一个实施例，射频（RF）收发器包括能够进行有效的前置放大增益控制的发射器。 RF收发器包括用于放大发射机的发射信号的接收机和功率放大器（PA）。 发射器被配置为提供预PA增益控制，用于在PA放大之前对发射信号进行前置放大，其中当发射信号处于发射机的发射频率时，提供基本上所有的预PA增益控制。 在一个实施例中，发射机包括PA驱动器，其包括：跨导放大器，电流转向块和输出变压器。 跨导放大器，电流控制块和输出变压器中的每一个被配置为对由PA驱动器提供的前PA增益控制贡献相应的可变增益控制。
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公开(公告)号：US20130157598A1
公开(公告)日：2013-06-20
申请号：US13328518
申请日：2011-12-16
申请人： Dmitriy ROZENBLIT , Masoud Kahrizi
发明人： Dmitriy ROZENBLIT , Masoud Kahrizi
CPC分类号： H04W52/52 , H04B17/101 , H04B17/102 , H04B17/103
摘要： Systems and methods are provided for detecting forward power sent to an antenna and reflected power reflected back from the antenna. Embodiments of the present invention provide systems and methods for measuring forward and reflected power and controlling the amount of power supplied to the antenna responsive to these measurements. Embodiments of the present invention enable the power sent to the antenna to be dynamically altered when antenna impendence changes (e.g., when the antenna gets too close to another object).
摘要翻译： 提供了用于检测发送到天线的正向功率和从天线反射回的反射功率的系统和方法。 本发明的实施例提供了用于测量前向和反射功率并根据这些测量来控制提供给天线的功率量的系统和方法。 当天线阻抗改变时（例如，当天线太靠近另一个物体时），本发明的实施例使能发送到天线的功率被动态地改变。
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公开(公告)号：US20110268216A1
公开(公告)日：2011-11-03
申请号：US12771559
申请日：2010-04-30
IPC分类号： H04L27/00
CPC分类号： H04W52/12 , H03G3/001 , H03G3/3089 , H04B2001/0416
摘要： Embodiments provide improved systems and methods of gain control and calibration for wireless transmitters. In particular, embodiments allow linear gain control over the entire transmitter gain control range, independent of temperature/process variations. Embodiments require very low power consumption compared to existing approaches. Embodiments may also be used for gain control calibration during production time, thereby substantially reducing production calibration time and cost.
摘要翻译： 实施例提供了用于无线发射机的增强控制和校准的改进的系统和方法。 特别地，实施例允许在整个发射机增益控制范围内的线性增益控制，与温度/过程变化无关。 与现有方法相比，实施例需要非常低的功耗。 实施例也可用于在生产时间期间的增益控制校准，从而大大减少生产校准时间和成本。
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6.发明授权Systems and methods for power control in a multiple standard mobile transmitter 有权多标准移动发射机功率控制系统和方法公开(公告)号：US08874051B2
公开(公告)日：2014-10-28
申请号：US13310434
申请日：2011-12-02
CPC分类号： H04L1/0033 , H03F1/0211 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/245 , H03F2200/451 , H03F2200/465 , H03G3/3042
摘要： A transmitter adjusts a transmitted power level by modifying a control input of a variable gain amplifier. A power amplifier control system includes an envelope extractor, an error extractor, and a feed-forward multiplier. The envelope extractor receives data signal inputs and computes the envelope of the combined signal. The error extractor generates an error signal as a function of the combined signal and the output power generated by the power amplifier. The feed-forward multiplier generates a modified error signal that is responsive to a function of the gain in a feedback path. A corresponding method for controlling a power level is also disclosed. In some embodiments, a transmit chain with a power control loop is used to adjust the transmit signal power applied at an input of a variable gain amplifier. A corresponding method for adjusting the transmit signal power level is also included.
摘要翻译： 发射机通过修改可变增益放大器的控制输入来调整发射功率电平。 功率放大器控制系统包括信封提取器，误差提取器和前馈乘法器。 信封提取器接收数据信号输入并计算组合信号的包络。 误差提取器产生作为组合信号和功率放大器产生的输出功率的函数的误差信号。 前馈乘法器产生响应于反馈路径中的增益的函数的修改的误差信号。 还公开了一种用于控制功率电平的相应方法。 在一些实施例中，具有功率控制环路的发射链用于调整在可变增益放大器的输入处施加的发射信号功率。 还包括用于调整发射信号功率电平的相应方法。
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7.发明申请SYSTEMS AND METHODS FOR POWER CONTROL IN A MULTIPLE STANDARD MOBILE TRANSMITTER 有权多标准移动发射机功率控制系统与方法公开(公告)号：US20120170624A1
公开(公告)日：2012-07-05
申请号：US13310434
申请日：2011-12-02
CPC分类号： H04L1/0033 , H03F1/0211 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/245 , H03F2200/451 , H03F2200/465 , H03G3/3042
摘要： A transmitter adjusts a transmitted power level by modifying a control input of a variable gain amplifier. A power amplifier control system includes an envelope extractor, an error extractor, and a feed-forward multiplier. The envelope extractor receives data signal inputs and computes the envelope of the combined signal. The error extractor generates an error signal as a function of the combined signal and the output power generated by the power amplifier. The feed-forward multiplier generates a modified error signal that is responsive to a function of the gain in a feedback path. A corresponding method for controlling a power level is also disclosed. In some embodiments, a transmit chain with a power control loop is used to adjust the transmit signal power applied at an input of a variable gain amplifier. A corresponding method for adjusting the transmit signal power level is also included.
摘要翻译： 发射机通过修改可变增益放大器的控制输入来调整发射功率电平。 功率放大器控制系统包括信封提取器，误差提取器和前馈乘法器。 信封提取器接收数据信号输入并计算组合信号的包络。 误差提取器产生作为组合信号和功率放大器产生的输出功率的函数的误差信号。 前馈乘法器产生响应于反馈路径中的增益的函数的修改的误差信号。 还公开了一种用于控制功率电平的相应方法。 在一些实施例中，具有功率控制环路的发射链用于调整在可变增益放大器的输入处施加的发射信号功率。 还包括用于调整发射信号功率电平的相应方法。
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公开(公告)号：US08862064B2
公开(公告)日：2014-10-14
申请号：US12924353
申请日：2010-09-24
申请人： Masoud Kahrizi , Zhimin Zhou , Hooman Darabi
发明人： Masoud Kahrizi , Zhimin Zhou , Hooman Darabi
IPC分类号： H04B17/00
CPC分类号： H04B17/0027 , H04B17/13 , H04B17/19
摘要： A self-testing transceiver comprises a receiver, and a transmitter including a power amplifier (PA) and a plurality of transmitter pre-PA stages. The plurality of transmitter pre-PA stages are configured to generate a communication signal at a receive frequency of the transceiver and the receiver is configured to process another communication signal at a transmit frequency of the transceiver, thereby enabling transceiver self-testing. A method for use by a transceiver for self-testing comprises generating a first communication signal at a transmit frequency of the transceiver by a transmitter of the transceiver, processing the first communication signal by a receiver of the transceiver, generating a second communication signal at a receive frequency of the transceiver by the transmitter, and processing the second communication signal by the receiver. The described generating and processing of the first and second communication signals resulting in self-testing by the transceiver.
摘要翻译： 自检收发器包括接收器和包括功率放大器（PA）和多个发射器预PA级的发射器。 多个发射器预PA级被配置为以收发器的接收频率生成通信信号，并且接收器被配置为以收发器的发射频率处理另一通信信号，由此使能收发器自检。 收发信机用于自检的方法包括：通过收发信机的发射机在收发信机的发射频率下生成第一通信信号，由收发信机的接收机处理第一通信信号，产生第二通信信号 由发射机接收收发信机的频率，并由接收机处理第二通信信号。 所描述的第一和第二通信信号的产生和处理导致收发器的自检。
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公开(公告)号：US07715814B2
公开(公告)日：2010-05-11
申请号：US11569031
申请日：2005-05-13
申请人： Tajinder Manku , Masoud Kahrizi
发明人： Tajinder Manku , Masoud Kahrizi
CPC分类号： H04B1/30 , H03D7/00 , H04B15/06 , H04B2215/065
摘要： A method and system for dynamically shifting spurious tones away from the desired frequency in a virtual local oscillator receiver, such that any undesired signal residing at such spurious tones are effectively delineated from the desired signal and removed from the RF input signal. The system detects the presence of potential undesired blocker signals in the RF input signal, and initiates an iterative power comparison and mixer signal adjustment loop. As the virtual local oscillator uses two mixer signals, the frequency of one of the mixer signals is adjusted during the loop until the power of the down-converted signal is minimized to a predetermined level. Minimized power in the down-converted signal is indicative of the absence of the blocker signal, since the presence of a relatively high power signal is indicative of a blocker signal overlapping with a desired signal.
摘要翻译： 一种用于在虚拟本地振荡器接收机中动态地将杂散音调从期望频率移位的方法和系统，使得驻留在这种寄生音调处的任何不需要的信号被有效地从期望的信号中描绘出并从RF输入信号中去除。 该系统检测RF输入信号中存在潜在的不希望的阻塞信号，并启动迭代功率比较和混频信号调节环路。 由于虚拟本地振荡器使用两个混频器信号，所以在环路中调整混频信号之一的频率，直到下变频信号的功率被最小化到预定的电平。 下变频信号中的最小化功率表示不存在阻塞信号，因为相对高功率信号的存在表示阻塞信号与期望信号重叠。
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公开(公告)号：US08457580B2
公开(公告)日：2013-06-04
申请号：US12804399
申请日：2010-07-20
申请人： Mohyee Mikhemar , Hooman Darabi , Masoud Kahrizi
发明人： Mohyee Mikhemar , Hooman Darabi , Masoud Kahrizi
摘要： According to one embodiment, a compact low-power receiver comprises a front-end producing a front-end gain and a back-end producing a back-end gain. The front-end includes a transconductance amplifier providing digital gain control and outputting an amplified receive signal, a mixer for generating a down-converted signal from the amplified receive signal, and a transimpedance amplifier (TIA) including a current mode buffer. The TIA provides gain control for amplifying the down-converted signal to produce a front-end output signal. In one embodiment, the back end includes a second-order low-pass filter to produce a filtered signal from the front-end output signal and an analog-to-digital converter (ADC), wherein the filtered signal is fed directly to the ADC without direct-current (DC) offset cancellation being performed. In various embodiments, the front-end gain is substantially greater than the back-end gain.
摘要翻译： 根据一个实施例，紧凑型低功率接收机包括产生前端增益的前端和产生后端增益的后端。 前端包括提供数字增益控制和输出放大的接收信号的跨导放大器，用于从放大的接收信号产生下变频信号的混频器，以及包括电流模式缓冲器的跨阻抗放大器（TIA）。 TIA提供用于放大下变频信号以产生前端输出信号的增益控制。 在一个实施例中，后端包括从前端输出信号产生滤波信号的二阶低通滤波器和模数转换器（ADC），其中滤波后的信号被直接馈送到ADC 没有执行直流（DC）偏移消除。 在各种实施例中，前端增益基本上大于后端增益。
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