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1.发明授权Output stage of operational amplifier suitable for mounting on a substrate and method of amplifying therewith 失效适用于安装在基板上的运算放大器的输出级及其放大方法
公开(公告)号：US5646576A
公开(公告)日：1997-07-08
申请号：US506158
申请日：1995-07-24
CPC分类号： H03F1/0277
摘要： An output stage (418) for an operational amplifier (403) powered by a first supply voltage rail (102) and a second supply voltage rail (104) includes a buffer (100) and a current booster (500) for amplifying an input voltage (105) into a low impedance output signal (117 and 520). The buffer (100) amplifies the input voltage (105) into the amplified output signal (117 and 520) when the input voltage (105) is within a buffer voltage range (210), the buffer voltage range (210) contained within a maximum voltage range (208) defined by a voltage difference in the first supply voltage rail (102) and the second supply voltage rail (104). The current booster (500) assists the buffer (100) in amplifying the input voltage (105) into the output signal (117 and 520) when the input voltage (105) is outside of the buffer voltage range (210) but within the maximum voltage range (208).
摘要翻译： 用于由第一电源电压轨（102）和第二电源电压轨（104）供电的运算放大器（403）的输出级（418）包括缓冲器（100）和用于放大输入电压 （105）转换成低阻抗输出信号（117和520）。 当输入电压（105）在缓冲电压范围（210）内时，缓冲器（100）将输入电压（105）放大到放大的输出信号（117和520）中，缓冲器电压范围（210）包含在最大值 电压范围（208）由第一电源电压轨（102）和第二电源电压轨（104）中的电压差限定。 当输入电压（105）在缓冲器电压范围（210）之外但在最大值内时，电流升压器（500）帮助缓冲器（100）将输入电压（105）放大到输出信号（117和520） 电压范围（208）。
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公开(公告)号：US08185066B2
公开(公告)日：2012-05-22
申请号：US12604854
申请日：2009-10-23
IPC分类号： H04B1/04
CPC分类号： H03F1/3247 , H03F1/0222 , H03F1/0266
摘要： A device may include an envelope detector to generate an envelope signal from the input signal, a drain bias controller to adjust a drain bias of the amplifier based on the envelope signal, a gate bias controller to adjust a gate bias of the amplifier based on the envelope signal, a predistortion controller to predistort the input signal based on the envelope signal, based on the adjusted drain bias, and based on the adjusted gate bias, and to output the predistorted signal, and an amplifier to receive the predistorted signal and to generate an amplified output signal from the predistorted signal. The device may be selectable to operate in a linear mode or a nonlinear mode. The nonlinear mode may be selected by applying a large gate offset bias.
摘要翻译： 器件可以包括一个包络检测器，用于根据输入信号产生一个包络信号，一个漏极偏置控制器，用于根据包络信号调整放大器的漏极偏置;一个栅极偏置控制器，用于根据 包络信号，预失真控制器，用于基于包络信号，基于经调整的漏极偏置，并且基于调整的栅极偏置来预输入输入信号，并输出预失真信号，以及放大器以接收预失真信号并产生 来自预失真信号的放大的输出信号。 该装置可以被选择为以线性模式或非线性模式操作。 可以通过施加大的门偏移偏置来选择非线性模式。
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公开(公告)号：US09031523B2
公开(公告)日：2015-05-12
申请号：US13533448
申请日：2012-06-26
摘要： A method for measuring an impedance of an antenna includes generating, by a signal source coupled to the antenna, a radio frequency (RF) signal, applying the RF signal to a directional coupler, and mixing, by a first mixer, a first signal from the directional coupler with a signal, wherein the first signal corresponds to a reflected power from the antenna. The method further includes mixing, by a second mixer, a second signal with the signal, wherein the second signal is offset from the first signal by ninety degrees. The method further includes outputting, by a first lower pass filter (LPF) coupled to an output of the first mixer, a real part of a reflection coefficient of the antenna and outputting, by a second lower pass filter (LPF) coupled to an output of the second mixer, an imaginary part of the reflection coefficient.
摘要翻译： 用于测量天线的阻抗的方法包括：通过耦合到天线的信号源产生射频（RF）信号，将RF信号施加到定向耦合器，并且通过第一混频器将第一信号从 具有信号的定向耦合器，其中第一信号对应于来自天线的反射功率。 该方法还包括通过第二混合器将第二信号与信号进行混合，其中第二信号与第一信号偏离九十度。 该方法还包括通过耦合到第一混频器的输出的第一低通滤波器（LPF）输出天线的反射系数的实部，并通过耦合到输出端的第二低通滤波器（LPF）输出 的反射系数的虚部。
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公开(公告)号：US20130342404A1
公开(公告)日：2013-12-26
申请号：US13533448
申请日：2012-06-26
IPC分类号： G01R27/06
摘要： A method for measuring an impedance of an antenna includes generating, by a signal source coupled to the antenna, a radio frequency (RF) signal, applying the RF signal to a directional coupler, and mixing, by a first mixer, a first signal from the directional coupler with a signal, wherein the first signal corresponds to a reflected power from the antenna. The method further includes mixing, by a second mixer, a second signal with the signal, wherein the second signal is offset from the first signal by ninety degrees. The method further includes outputting, by a first lower pass filter (LPF) coupled to an output of the first mixer, a real part of a reflection coefficient of the antenna and outputting, by a second lower pass filter (LPF) coupled to an output of the second mixer, an imaginary part of the reflection coefficient.
摘要翻译： 用于测量天线的阻抗的方法包括：通过耦合到天线的信号源产生射频（RF）信号，将RF信号施加到定向耦合器，并且通过第一混频器将第一信号从 具有信号的定向耦合器，其中第一信号对应于来自天线的反射功率。 该方法还包括通过第二混合器将第二信号与信号进行混合，其中第二信号与第一信号偏离九十度。 该方法还包括通过耦合到第一混频器的输出的第一低通滤波器（LPF）输出天线的反射系数的实部，并通过耦合到输出端的第二低通滤波器（LPF）输出 的反射系数的虚部。
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公开(公告)号：US09002278B2
公开(公告)日：2015-04-07
申请号：US13408719
申请日：2012-02-29
CPC分类号： H04B1/163 , H03H7/40 , H04B1/0458 , H04B17/12 , H04B17/30
摘要： Embodiments of a method for tuning the resonant frequency of an antenna in a wireless communication device are disclosed, along with embodiments of a wireless communication device using such a method. Embodiments sense the out-of-band impedance of the antenna, which comprises an antenna element and selectively adjustable impedance disposed between the antenna element and a ground plane of the wireless device, and adjust the selectively adjustable impedance to achieve a desired resonant frequency of the antenna. Embodiments separate an antenna signal into an in-band signal and out-of-band impedance, generate an error signal related to the out-of-band impedance, apply the error signal to a controller circuit configurable to generate an impedance error signal representing the change in antenna impedance, and apply the impedance error signal to the selectively adjustable impedance. Embodiments of a method and electronic circuit for determining the change in impedance of an antenna are also disclosed.
摘要翻译： 公开了一种用于调谐无线通信设备中的天线的谐振频率的方法的实施例以及使用这种方法的无线通信设备的实施例。 实施例感测天线的带外阻抗，其包括设置在天线元件和无线设备的接地平面之间的天线元件和选择性可调节的阻抗，并且调节选择性可调节的阻抗以实现所希望的谐振频率 天线。 实施例将天线信号分离成带内信号和带外阻抗，产生与带外阻抗相关的误差信号，将误差信号施加到可配置为产生代表该频带阻抗的阻抗误差信号 改变天线阻抗，并将阻抗误差信号应用于选择性可调阻抗。 还公开了一种用于确定天线的阻抗变化的方法和电子电路的实施例。
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公开(公告)号：US20110098011A1
公开(公告)日：2011-04-28
申请号：US12604854
申请日：2009-10-23
CPC分类号： H03F1/3247 , H03F1/0222 , H03F1/0266
摘要： A device may include an envelope detector to generate an envelope signal from the input signal, a drain bias controller to adjust a drain bias of the amplifier based on the envelope signal, a gate bias controller to adjust a gate bias of the amplifier based on the envelope signal, a predistortion controller to predistort the input signal based on the envelope signal, based on the adjusted drain bias, and based on the adjusted gate bias, and to output the predistorted signal, and an amplifier to receive the predistorted signal and to generate an amplified output signal from the predistorted signal. The device may be selectable to operate in a linear mode or a nonlinear mode. The nonlinear mode may be selected by applying a large gate offset bias.
摘要翻译： 器件可以包括一个包络检测器，用于根据输入信号产生一个包络信号，一个漏极偏置控制器，用于根据包络信号调整放大器的漏极偏置;一个栅极偏置控制器，用于根据 包络信号，预失真控制器，用于基于包络信号，基于经调整的漏极偏置，并且基于调整的栅极偏置来预输入输入信号，并输出预失真信号，以及放大器以接收预失真信号并产生 来自预失真信号的放大的输出信号。 该装置可以被选择为以线性模式或非线性模式操作。 可以通过施加大的门偏移偏置来选择非线性模式。
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公开(公告)号：US20130225088A1
公开(公告)日：2013-08-29
申请号：US13408719
申请日：2012-02-29
CPC分类号： H04B1/163 , H03H7/40 , H04B1/0458 , H04B17/12 , H04B17/30
摘要： Embodiments of a method for tuning the resonant frequency of an antenna in a wireless communication device are disclosed, along with embodiments of a wireless communication device using such a method. Embodiments sense the out-of-band impedance of the antenna, which comprises an antenna element and selectively adjustable impedance disposed between the antenna element and a ground plane of the wireless device, and adjust the selectively adjustable impedance to achieve a desired resonant frequency of the antenna. Embodiments separate an antenna signal into an in-band signal and out-of-band impedance, generate an error signal related to the out-of-band impedance, apply the error signal to a controller circuit configurable to generate an impedance error signal representing the change in antenna impedance, and apply the impedance error signal to the selectively adjustable impedance. Embodiments of a method and electronic circuit for determining the change in impedance of an antenna are also disclosed.
摘要翻译： 公开了一种用于调谐无线通信设备中的天线的谐振频率的方法的实施例以及使用这种方法的无线通信设备的实施例。 实施例感测天线的带外阻抗，其包括设置在天线元件和无线设备的接地平面之间的天线元件和选择性可调节的阻抗，并且调节选择性可调节的阻抗以实现所希望的谐振频率 天线。 实施例将天线信号分离成带内信号和带外阻抗，产生与带外阻抗相关的误差信号，将误差信号施加到可配置为产生代表该频带阻抗的阻抗误差信号 改变天线阻抗，并将阻抗误差信号应用于选择性可调阻抗。 还公开了一种用于确定天线的阻抗变化的方法和电子电路的实施例。
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公开(公告)号：US20080171523A1
公开(公告)日：2008-07-17
申请号：US11613392
申请日：2006-12-20
CPC分类号： H03F1/0261 , H03F1/0205 , H03F1/0211 , H03F1/0233 , H03F1/0272 , H03F2200/207 , H03F2200/451 , H03F2200/465 , H03F2200/504
摘要： A power amplifier circuit for a mobile terminal controls the bias voltage depending on the modulation of the input signal. The power amplifier circuit includes a power amplifier control circuit configured to control power amplifier bias for a first input signal modulation using calibrated bias control values corresponding to a range of transmit power levels, and to control power amplifier bias for said second input signal modulation using adjusted bias control values obtained by adding bias offsets to said calibrated bias control values.
摘要翻译： 用于移动终端的功率放大器电路根据输入信号的调制来控制偏置电压。 功率放大器电路包括功率放大器控制电路，其被配置为使用对应于发射功率电平的范围的校准偏置控制值来控制用于第一输入信号调制的功率放大器偏置，并且使用经调整的调节器控制所述第二输入信号调制的功率放大器偏置 通过将偏置偏移加到所述校准的偏置控制值而获得的偏置控制值。
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9.发明授权Wireless terminals, methods and computer program products with transmit power amplifier input power regulation 有权无线终端，方法和计算机程序产品具有发射功率放大器输入功率调节公开(公告)号：US07102442B2
公开(公告)日：2006-09-05
申请号：US10833655
申请日：2004-04-28
IPC分类号： H03G3/10
CPC分类号： H03G3/004 , H03G3/3042 , H03G3/3047 , H04W52/04
摘要： A transmit power amplifier of a wireless terminal is controlled by determining a power supply voltage applied to the transmit power amplifier, determining a power supply current provided to the transmit power amplifier, determining a relationship of the determined power supply current and the determined power supply voltage, and controlling the power supply voltage responsive to the determined relationship of the power supply current and the power supply voltage. For example, determining a relationship of the determined power supply current and the determined power supply voltage may include determining whether the power supply current meets a predetermined criterion, e.g., a predetermined current range, associated with the determined power supply voltage. The invention may be embodied as apparatus, methods, and computer program products.
摘要翻译： 通过确定施加到发射功率放大器的电源电压来确定提供给发射功率放大器的电源电流，确定所确定的电源电流和所确定的电源电压的关系来控制无线终端的发射功率放大器 并且响应于所确定的电源电流和电源电压的关系来控制电源电压。 例如，确定所确定的电源电流和所确定的电源电压的关系可以包括确定电源电流是否满足与所确定的电源电压相关联的预定标准，例如预定电流范围。 本发明可以体现为装置，方法和计算机程序产品。
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公开(公告)号：US5732330A
公开(公告)日：1998-03-24
申请号：US675171
申请日：1996-07-02
CPC分类号： H04B1/006 , H03D7/16 , H04B1/005 , H04B1/0057 , H04B1/406
摘要： A dual band transceiver for operating in a first lower frequency band such as the band allocated to cellular systems, and in a second higher frequency band such as the band allocated to personal communication services (PCS) systems. In a representative embodiment, the dual band transceiver comprises a main voltage controlled oscillator (VCO) for generating a local oscillator (LO) signal; an offset VCO for generating an offset frequency (OF) signal; a first mixer for combining the LO signal with the OF signal to produce a first transmit signal; a modulator for modulating the first transmit signal with the data signal to produce a first data modulated transmit signal; and a second mixer for combining the first data modulated transmit signal with the LO signal to produce a second data modulated signal. The main VCO and the offset VCO can be programmed such that the first data modulated transmit signal is in the first band and the second data modulated transmit signal is in the second band.
摘要翻译： 用于在诸如分配给蜂窝系统的频带的第一较低频带以及诸如分配给个人通信服务（PCS）系统的频带的第二较高频带中操作的双频带收发器。 在代表性的实施例中，双频带收发器包括用于产生本地振荡器（LO）信号的主压控振荡器（VCO） 用于产生偏移频率（OF）信号的偏移VCO; 用于将LO信号与OF信号组合以产生第一发射信号的第一混频器; 调制器，用于利用所述数据信号来调制所述第一发射信号，以产生第一数据调制的发射信号; 以及第二混频器，用于将第一数据调制发射信号与LO信号组合以产生第二数据调制信号。 可以对主VCO和偏移VCO进行编程，使得第一数据调制发送信号处于第一频带，而第二数据调制发送信号处于第二频带。
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