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    • 7. 发明专利
    • Amplifier and frequency converter
    • 放大器和频率转换器
    • JP2003289226A
    • 2003-10-10
    • JP2002091869
    • 2002-03-28
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • NAKATANI TOSHIBUMIITO JUNJINAKANO HIDEO
    • H03D7/14H03D7/18H03F1/34H03F3/45
    • H03F3/45089H03F1/34H03F2200/372H03F2203/45298H03F2203/45386H03F2203/45464H03F2203/45544H03F2203/45631
    • PROBLEM TO BE SOLVED: To provide a negative feedback amplifier which is suitable for integration of an semiconductor integrated circuit, having a wide dynamic range.
      SOLUTION: An amplifying circuit 10 amplifies a signal inputted from an input terminal P1. A phase control circuit 10 is arranged between the emitter of a bipolar transistor 101 and a ground connection. A feedback circuit 30 is connected between the input and the output of the amplifying circuit 10, and it feeds back the output of the amplifying circuit 10 to input. The variations of phase in the amplifying circuit 10 is determined by the value of an inductor 201, and the variations of phase in the feedback circuit 30 is determined by the values of a resistor 301 and a capacitor 302. The value of each element of these is selected so that the phase difference between an input signal and a feedback signal is 180°, extending in a range of the frequency of the fundamental waves of the input signal to the frequency of second-order harmonic waves. Hereby, the fundamental waves, third-order modulated waves, and second-order harmonic waves of the input signal are fed back negatively to the input.
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:提供一种适用于具有宽动态范围的半导体集成电路的集成的负反馈放大器。 解决方案:放大电路10放大从输入端子P1输入的信号。 在双极晶体管101的发射极和接地连接之间设置相位控制电路10。 反馈电路30连接在放大电路10的输入和输出之间,并将放大电路10的输出反馈到反馈电路10。 放大电路10中的相位的变化由电感器201的值确定,并且反馈电路30中的相位的变化由电阻器301和电容器302的值确定。这些的每个元件的值 被选择为使得输入信号和反馈信号之间的相位差为180°,在输入信号的基波的频率的范围内延伸到二次谐波的频率。 因此,输入信号的基波,三阶调制波和二次谐波被反馈地反馈给输入。 版权所有(C)2004,JPO