公开(公告)号：US07157977B2

公开(公告)日：2007-01-02

申请号：US10995033

申请日：2004-11-23

申请人： Sang Heung Lee ,  Hyeon Cheol Ki ,  Jin Yeong Kang ,  Kyu Hwan Shim ,  Kyong Ik Cho

发明人： Sang Heung Lee ,  Hyeon Cheol Ki ,  Jin Yeong Kang ,  Kyu Hwan Shim ,  Kyong Ik Cho

IPC分类号： H03F3/08

CPC分类号： H03F3/08 ,  H03F1/34 ,  H03F3/3432 ,  H03F3/50 ,  H03G3/3084

摘要： There is provided a feedback amplifier capable of easily controlling its dynamic range without a separate gain control signal generation circuit. The feedback amplifier includes an input terminal detecting an input voltage from input current, a feedback amplification unit amplifying the input voltage to generate an output signal, and an output terminal outputting a signal amplified by the feedback amplification unit. The feedback amplification unit includes a feedback circuit unit including a feedback resistor located between the input terminal and the output terminal, and a feedback transistor connected in parallel to the feedback resistor; and a bias circuit unit supplying a predetermined bias voltage to the feedback transistor of the feedback circuit unit and merged in the feedback amplification unit.

摘要翻译： 提供了一种反馈放大器，其能够在没有单独的增益控制信号产生电路的情况下容易地控制其动态范围。 反馈放大器包括检测来自输入电流的输入电压的输入端子，放大输入电压以产生输出信号的反馈放大单元，以及输出由反馈放大单元放大的信号的输出端子。 反馈放大单元包括反馈电路单元，该反馈电路单元包括位于输入端子和输出端子之间的反馈电阻器和与反馈电阻器并联连接的反馈晶体管; 以及偏置电路单元，向反馈电路单元的反馈晶体管提供预定的偏置电压并且合并在反馈放大单元中。