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JP2006067573A Low noise amplifier 审中-公开
标题翻译：低噪音放大器
公开(公告)号：JP2006067573A
公开(公告)日：2006-03-09
申请号：JP2005225630
申请日：2005-08-03
申请人： Stmicroelectronics Srl , エッセティマイクロエレクトロニクスエッセ.エルレ.エルレ.Stmicroelectronics S.R.L.
发明人： PELLERITI ROBERTO
IPC分类号： H03F1/26 , H03F1/56 , H03F3/45 , H03G3/10
CPC分类号： H03F1/56 , H03F1/26 , H03F3/183 , H03F3/45103 , H03F2200/372 , H03F2203/45492 , H03F2203/45722
摘要： PROBLEM TO BE SOLVED: To provide a low noise amplifier showing a fixed input resistance, or showing satisfactory linearity when an input signal is high and a satisfactory noise pattern when the input signal is low. SOLUTION: This low noise amplifier is provided with a first circuit block capable of amplifying a first voltage signal that is input to the amplifier. The first circuit block includes a first terminal coupled to a first power supply voltage by a first variable resistance and a second terminal coupled to a second power supply voltage. The second terminal is coupled to the output terminal of the amplifier, and the input voltage signal is applied to a further terminal of the first circuit block. The amplifier also includes a feedback network coupled to the output terminal and to the further terminal of the first circuit block, and a second circuit means (3) coupled between the second power supply voltage and the other terminal of the first circuit block. The second circuit means is adapted to compensate for variations in the value of the first variable resistance to ensure the substantially constant input resistance of the amplifier. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种显示固定输入电阻的低噪声放大器，或者当输入信号为高电平时显示令人满意的线性度，并且当输入信号为低时提供令人满意的噪声模式。解决方案：该低噪声放大器设置有能够放大输入到放大器的第一电压信号的第一电路块。第一电路块包括通过第一可变电阻耦合到第一电源电压的第一端子和耦合到第二电源电压的第二端子。第二端子耦合到放大器的输出端，并且输入电压信号被施加到第一电路块的另一个端子。放大器还包括耦合到输出端子和第一电路块的另一端子的反馈网络，以及耦合在第二电源电压和第一电路块的另一端子之间的第二电路装置（3）。第二电路装置适于补偿第一可变电阻值的变化，以确保放大器基本上恒定的输入电阻。版权所有（C）2006，JPO＆NCIPI

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