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1. 发明申请

US20070109056A1 Amplifier circuit, and system incorporating same 有权
标题翻译：放大器电路和系统结合
公开(公告)号：US20070109056A1
公开(公告)日：2007-05-17
申请号：US11282455
申请日：2005-11-17
申请人： Hock Kwa , Xue Ji , Bin Zhang , Pak Chan
发明人： Hock Kwa , Xue Ji , Bin Zhang , Pak Chan
IPC分类号： H03F3/08
CPC分类号： H03F1/486 , H03F1/0205 , H03F1/301 , H03F3/087 , H03F3/345
摘要： In one embodiment, a current source circuit having a reference resistor produces first, second and third bias currents that vary with manufacturing variances of the current compensation resistor. An input amplification stage includes a transconductance stage biased by the first bias current, a first transimpedance amplifier (TIA) biased by the second bias current, and a first feedback resistor coupled between the first TIA's input and output. The input of the first TIA is coupled to an output of the transconductance stage. An output amplification stage is biased by the third bias current and has an input coupled to an output of the first TIA. A second feedback resistor is coupled between the output of the output amplification stage and the input of the transconductance stage. The reference resistor and first and second feedback resistors are formed using a common manufacturing process.
摘要翻译：在一个实施例中，具有参考电阻器的电流源电路产生随着电流补偿电阻器的制造方差而变化的第一，第二和第三偏置电流。输入放大级包括由第一偏置电流偏置的跨导级，由第二偏置电流偏置的第一跨阻抗放大器（TIA）和耦合在第一TIA的输入和输出之间的第一反馈电阻器。第一TIA的输入耦合到跨导级的输出。输出放大级被第三偏置电流偏置，并且具有耦合到第一TIA的输出的输入。第二反馈电阻耦合在输出放大级的输出和跨导级的输入之间。参考电阻器和第一和第二反馈电阻器使用常见的制造工艺形成。

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