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1.发明申请公开(公告)号：US20140206301A1
公开(公告)日：2014-07-24
申请号：US13976384
申请日：2012-03-27
CPC分类号： H04B15/02 , H03H7/40 , H04B1/0458 , H04B1/18 , H04B1/44
摘要： Disclosed is an apparatus including a transmitter amplifier having an output terminal communicatively coupled to a transmission line to output a first set of radio frequency (RF) signals to an antenna. The apparatus may include a receiver amplifier having an input terminal communicatively coupled to the transmission line to receive a second set of RF signals from the antenna. The apparatus may include a passive network coupled between the transmitter amplifier and the receiver amplifier, the passive network being configurable to cancel either a first reactance of a parasitic capacitance of the transmitter amplifier or second reactance of a parasitic capacitance of the receiver amplifier. The apparatus may also include a switch coupled between the input terminal and a voltage reference to selectively configure the passive network to cancel either the first reactance or the second reactance. Other embodiments may be described and claimed.
摘要翻译： 公开了一种装置，其包括具有通信地耦合到传输线以将第一组射频（RF）信号输出到天线的输出端的发射机放大器。 该装置可以包括具有通信地耦合到传输线以从天线接收第二组RF信号的输入端的接收机放大器。 该装置可以包括耦合在发射机放大器和接收机放大器之间的无源网络，无源网络可配置为消除发射机放大器的寄生电容的第一电抗或接收机放大器的寄生电容的第二电抗。 该装置还可以包括耦合在输入端子和电压基准之间的开关，以选择性地配置无源网络以抵消第一电抗或第二电抗。 可以描述和要求保护其他实施例。
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公开(公告)号：US07627060B2
公开(公告)日：2009-12-01
申请号：US11386199
申请日：2006-03-21
申请人： Stewart S. Taylor
发明人： Stewart S. Taylor
IPC分类号： H04L27/00
CPC分类号： H04B1/30 , H03F1/32 , H03F1/3241 , H03F1/3258 , H04L27/38
摘要： In some embodiments, methods and apparatus to reduce nonlinearity in a receiver are generally described herein. Other embodiments may be described and claimed.
摘要翻译： 在一些实施例中，本文通常描述了减少接收机中的非线性的方法和装置。 可以描述和要求保护其他实施例。
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公开(公告)号：US07541875B2
公开(公告)日：2009-06-02
申请号：US11747250
申请日：2007-05-11
申请人： Stewart S. Taylor , Jon S. Duster
发明人： Stewart S. Taylor , Jon S. Duster
IPC分类号： H03F3/04
CPC分类号： H03F3/193 , H03F1/223 , H03F1/3205 , H03F2200/294
摘要： Embodiments of a high-linearity low-noise amplifier (LNA) and method are generally described herein. Other embodiments may be described and claimed. In some embodiments, an RF input signal may be amplified with a cascode amplifier and a common-gate stage. The common-gate stage is dynamically biased based on an output voltage of the common-gate stage to allow an output voltage swing to be shared between the cascode amplifier and the common-gate stage.
摘要翻译： 本文一般地描述高线性低噪声放大器（LNA）和方法的实施例。 可以描述和要求保护其他实施例。 在一些实施例中，RF输入信号可以用共源共栅放大器和共门级放大。 共栅极级基于共栅极级的输出电压动态偏置，以允许在共源共栅放大器和共栅极级之间共享输出电压摆幅。
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4.发明授权Method and apparatus to provide variable gain in a radio receiver front end 有权在无线电接收机前端提供可变增益的方法和装置公开(公告)号：US07539471B2
公开(公告)日：2009-05-26
申请号：US11394798
申请日：2006-03-30
CPC分类号： H03G3/3052
摘要： An RF receiver front end includes a variable gain low noise amplifier and/or a variable gain mixer to provide gain variability in the receiver. This gain variability may be used during, for example, automatic gain control operations. In at least one embodiment, the variable gain LNA is a broadband device that is capable of supporting multiple wireless standards.
摘要翻译： RF接收机前端包括可变增益低噪声放大器和/或可变增益混频器，以在接收机中提供增益变化。 这种增益变化可以在例如自动增益控制操作期间使用。 在至少一个实施例中，可变增益LNA是能够支持多个无线标准的宽带设备。
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5.发明授权Battery life extending technique for mobile wireless applications using bias level control 有权使用偏置电平控制的移动无线应用的电池寿命延长技术公开(公告)号：US07505742B2
公开(公告)日：2009-03-17
申请号：US10822106
申请日：2004-04-09
CPC分类号： H03F1/0261 , H03F1/0233 , H03F1/0272 , H03F2200/18 , H03F2200/207 , H03F2200/411 , H03G3/3036
摘要： An operating voltage applied to a transmitter's power amplifier in a mobile wireless transceiver is dynamically controlled so as to improve the efficiency of the transmitter at all output power levels. In one embodiment, the bias current levels within the transmitter are also varied to optimize the efficiency of the transmitter at all output power levels. In a preferred embodiment, a highly efficient switching regulator is controlled by a control circuit to adjust the operating voltage and/or bias current for the power amplifier in the transmitter. The control circuit has as its input any of a variety of signals which reflect the actual output power of the transmitter, the desired output power, or the output voltage swing of the transmitter.
摘要翻译： 动态地控制施加到移动无线收发器中的发射机功率放大器的工作电压，以便在所有输出功率电平下提高发射机的效率。 在一个实施例中，发射机内的偏置电流电平也被改变以在所有输出功率电平下优化发射机的效率。 在优选实施例中，高效开关调节器由控制电路控制，以调整发射机中功率放大器的工作电压和/或偏置电流。 控制电路具有反映发射机的实际输出功率，所需输出功率或发射机的输出电压摆幅的各种信号作为其输入。
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公开(公告)号：US20080224775A1
公开(公告)日：2008-09-18
申请号：US11724707
申请日：2007-03-16
申请人： Stewart S. Taylor , Jon S. Duster
发明人： Stewart S. Taylor , Jon S. Duster
IPC分类号： H03F3/45
CPC分类号： H03F1/223 , H03F3/19 , H03F2200/451 , H03G1/0029
摘要： A variable gain amplifier includes multiple gain stages. Each gain stage includes a gain transistor and a cascode transistor to form a cascode amplifier, and a current diversion transistor to divert current away from a cascode transistor to reduce gain in the stage. A control circuit is included to maintain substantially constant drain-to-source voltage and drain current in the gain transistor.
摘要翻译： 可变增益放大器包括多个增益级。 每个增益级包括增益晶体管和共源共栅晶体管，以形成共源共栅放大器，以及电流分流晶体管，以将电流转移到共源共栅晶体管，以减小阶段中的增益。 包括控制电路以在增益晶体管中保持基本恒定的漏极 - 源极电压和漏极电流。
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公开(公告)号：US20080150594A1
公开(公告)日：2008-06-26
申请号：US11644592
申请日：2006-12-22
CPC分类号： H03K17/145 , H03K17/223
摘要： A wireless device includes a supply independent bias circuit such as a bandgap current generator or a Proportional-To-Absolute-Temperature (PTAT) current generator. A start-up circuit that includes an amplifier and a Schmidt trigger to provide the desired start-up that avoids regulation to an undesired state.
摘要翻译： 无线设备包括电源独立偏置电路，例如带隙电流发生器或比例绝对温度（PTAT）电流发生器。 包括放大器和施密特触发器的启动电路，以提供避免调节到不期望状态的期望启动。
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公开(公告)号：US20070268072A1
公开(公告)日：2007-11-22
申请号：US11435397
申请日：2006-05-16
IPC分类号： H03F1/34
CPC分类号： H03F1/342 , H03F1/26 , H03F2200/294 , H03F2200/372
摘要： Embodiments related to resistive feedback amplifiers are presented herein.
摘要翻译： 本文给出了与电阻反馈放大器相关的实施例。
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公开(公告)号：US5327027A
公开(公告)日：1994-07-05
申请号：US814965
申请日：1991-12-24
申请人： Stewart S. Taylor
发明人： Stewart S. Taylor
CPC分类号： H03H11/405
摘要： A circuit is described herein which effectively multiplies the value of a capacitor. The circuit draws current from an input node, where this current being drawn is related to the gain of an amplifier and the value of a capacitor, thus effectively amplifying the capacitance value of a capacitor as seen at the input node.
摘要翻译： 这里描述了有效地乘以电容器的值的电路。 该电路从输入节点吸取电流，其中所绘制的电流与放大器的增益和电容器的值相关，从而有效地放大电容器的电容值，如输入节点所示。
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10.发明授权Compensation method and apparatus for enhancing single-ended to differential conversion 失效用于增强单端到差分转换的补偿方法和装置
公开(公告)号：US5068621A
公开(公告)日：1991-11-26
申请号：US566904
申请日：1990-08-13
CPC分类号： H03F3/45381 , H03F1/3211 , H03F3/45708 , H03F3/45766 , H03F2203/45702
摘要： A compensation method and apparatus for enhancing single-ended to differential conversion includes a compensation network that is coupled between the single-ended voltage input and the bias terminal of a differential stage. The compensation network has an impedance substantially equal to the impedance presented by the bias circuit used to bias the differential stage. Accordingly, the compensation network provides a current that substantially cancels the signal tail current supplied to the bias terminal of the differential stage, resulting in a balanced differential output. The compensation network may be AC coupled from the single-ended voltage input to the bias terminal in order to preserve the original DC operating condition. The compensation network may be chosen to provide more cancelling current at higher operating frequencies. Additionally, the compensation network can be configured to match a bias circuit built from resistors, transistors, current mirrors, or the like.
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