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1. 发明授权

US06504428B2 High linearity multicarrier RF amplifier 有权
公开(公告)号：US06504428B2
公开(公告)日：2003-01-07
申请号：US09859720
申请日：2001-05-16
申请人： Armando C. Cova , Emil J. Crescenzi, Jr. , Augustin P. Chang , Stephen J. Foley
发明人： Armando C. Cova , Emil J. Crescenzi, Jr. , Augustin P. Chang , Stephen J. Foley
IPC分类号： H03F366
CPC分类号： H03F1/3235
摘要： A hybrid multicarrier RF power amplifier linearization architecture combines ACT and feed-forward amplifier stages to achieve high output distortion rejection and enhanced amplifier linearity. A carrier cancellation loop is coupled with a main RF power amplifier stage having parallel RF power amplifiers coupled via intermod-complementing predistortion paths. The carrier cancellation loop is coupled to a feed-forward loop containing a feed-forward RF power amplifier, to produce a composite amplified output signal having very reduced intermodulation products. Vector modulators in the main amplifier and feed-forward amplifier stages are controlled by a digital signal processor, using outputs from various monitoring subsystems, including pilot tone detection, correlator, distortion and power detector circuits.

2. 发明授权

US5414313A Dual-mode logarithmic amplifier having cascaded stages 失效
标题翻译：具有级联级的双模对数放大器
公开(公告)号：US5414313A
公开(公告)日：1995-05-09
申请号：US16073
申请日：1993-02-10
申请人： Emil J. Crescenzi, Jr. , Jonathan K. Bamford , Titus J. Wandinger , Michael A. O'Mahoney
发明人： Emil J. Crescenzi, Jr. , Jonathan K. Bamford , Titus J. Wandinger , Michael A. O'Mahoney
IPC分类号： G06G7/24 , H03G7/00
CPC分类号： G06G7/24 , H03G7/001
摘要： A dual-mode successive detection amplifier for providing a first output signal corresponding to a logarithmic function of a RF input signal, and for providing a second limited RF output signal is disclosed herein. A RF input signal is applied to the first of a succession of amplification stages arranged along a RF signal path to cascade amplify the RF input signal into the limited RF output signal. A plurality of detector/limiter (D/L) circuits interposed between the amplification stages limit RF signal energy propagating along the RF signal path so as to prevent saturation of the amplification stages. The D/L modules also provide a succession of detection signals corresponding to video envelopes of the RF signal energy produced by each of the amplification stages. The detection signals are applied to a video summation line and therein summed to produce the logarithmic output signal.
摘要翻译：本文公开了一种用于提供对应于RF输入信号的对数函数并用于提供第二受限RF输出信号的第一输出信号的双模连续检测放大器。 RF输入信号被施加到沿着RF信号路径布置的一系列放大级中的第一级，以将RF输入信号级联放入有限的RF输出信号。插入在放大级之间的多个检测器/限制器（D / L）电路限制沿RF信号路径传播的RF信号能量，以防止放大级的饱和。 D / L模块还提供与由每个放大级产生的RF信号能量的视频包络对应的一系列检测信号。检测信号被加到一个视频求和线上，其中相加得到对数输出信号。

3. 发明授权

US4423388A RF Amplifier circuit employing FET devices 失效
标题翻译： RF放大器电路采用FET器件
公开(公告)号：US4423388A
公开(公告)日：1983-12-27
申请号：US316130
申请日：1981-10-29
申请人： Emil J. Crescenzi, Jr. , Walter T. Wilser , Richard W. Oglesbee , Richard B. Gold
发明人： Emil J. Crescenzi, Jr. , Walter T. Wilser , Richard W. Oglesbee , Richard B. Gold
IPC分类号： H03F3/193 , H03F3/60 , H03F3/04
CPC分类号： H03F3/601 , H03F3/1935
摘要： An RF amplifier including first and second FETs which are interconnected to function as a single transistor with improved gate. An input signal is applied across the gate and source of the first FET, and an output signal is obtained across the drain and source of the second transistor. RF coupling of the FETs is provided by first and second serially connected transmission lines connected between the drain of the first FET and the gate of the second FET. A third transmission line connects the common terminal of the first and second transmission line to circuit ground. In a preferred embodiment, the amplifier comprises a monolithic circuit formed in gallium arsenide with the transmission lines comprising microstrip.
摘要翻译：一种RF放大器，包括互连以用作具有改进的栅极的单个晶体管的第一和第二FET。输入信号施加在第一FET的栅极和源极之间，并且跨越第二晶体管的漏极和源极获得输出信号。 FET的RF耦合由连接在第一FET的漏极和第二FET的栅极之间的第一和第二串联连接的传输线提供。第三传输线将第一和第二传输线的公共端连接到电路接地。在优选实施例中，放大器包括在砷化镓中形成的单片电路，其中传输线包括微带线。

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