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1. 发明申请

US20030160659A1 Transimpedance amplifier 有权
标题翻译：互阻放大器
公开(公告)号：US20030160659A1
公开(公告)日：2003-08-28
申请号：US10372012
申请日：2003-02-21
申请人： Infineon Technologies AG
发明人： Jaafar Mejri
IPC分类号： H03F003/68
CPC分类号： H03F3/08
摘要： Transimpedance amplifier having an input stage (1) to which an input current to be amplified is fed and an output stage (2) which outputs an output voltage (uo) corresponding to the amplified input current. By means of a current control circuit (4) the current (Ic) flowing through the amplifying element (Q1) of the input stage (1) is detected and controlled in such a way that said current is independent of the ambient temperature and of the supply voltage (Vcc). To detect the current (Ic) a dummy transimpedance amplifier (5) is used in combination with a current mirror circuit (6), the current (Ic) being controlled in that the control voltage (Uc) of a further transistor (Qc) coupled to the amplifying element (Q1) configured as a transistor is adjusted accordingly.
摘要翻译：具有输入级（1）的互阻放大器，输入要放大的输入电流被馈送到输出级（2），输出级（2）输出与放大的输入电流对应的输出电压（uo）。通过电流控制电路（4），流过输入级（1）的放大元件（Q1）的电流（Ic）被检测和控制，使得所述电流独立于环境温度和电源电压（Vcc）。为了检测电流（Ic），将虚拟跨阻抗放大器（5）与电流镜电路（6）组合使用，电流（Ic）被控制为另一个晶体管（Qc）的控制电压（Uc）被耦合相应地调整配置为晶体管的放大元件（Q1）。

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