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    • 44. 发明专利
    • Amplifier circuit
    • 放大器电路
    • JP2006086682A
    • 2006-03-30
    • JP2004267838
    • 2004-09-15
    • Mitsubishi Electric Corp三菱電機株式会社
    • TAKAAI JUNYOSHIMURA TSUTOMUTOSAKA NORIO
    • H03G11/00H03F3/45H03G11/04
    • H03F3/45085H03F2203/45631H03F2203/45652H03F2203/45702
    • PROBLEM TO BE SOLVED: To provide an amplifier circuit the peaking strength of an active feedback circuit of which can externally be adjusted. SOLUTION: The amplifier circuit includes: a first differential amplifier circuit; a second differential amplifier circuit for amplifying the output signal of the first differential amplifier circuit; and the active feedback circuit for feeding back the output signal of the second differential amplifier circuit to apply waveform shaping to the output signal of the first differential amplifier circuit, and the active feedback circuit includes first and second transistors whose collectors or drains are connected to two output modes of the first differential amplifier circuit, respectively, whose bases or gates are connected to two output nodes of the second differential amplifier circuit, respectively, and whose emitters or sources are connected in common, and a first current source the one terminal of which is connected to the emitters or the sources of the first and second transistors and the other terminal of which is connected to a low level power supply, and the current value of which can externally be adjusted. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:为了提供放大器电路,其有源反馈电路的峰值强度可以从外部调整。 解决方案:放大器电路包括:第一差分放大器电路; 第二差分放大器电路,用于放大第一差分放大器电路的输出信号; 以及用于反馈第二差分放大器电路的输出信号的有源反馈电路以对第一差分放大器电路的输出信号施加波形整形,并且有源反馈电路包括第一和第二晶体管,其集电极或漏极连接到两个 第一差分放大器电路的基极或栅极分别连接到第二差分放大器电路的两个输出节点并且其发射器或源极共同连接的第一差分放大器电路的输出模式,以及其一个端子的第一电流源 连接到第一和第二晶体管的发射极或源极,另一个端子连接到低电平电源,其电流值可以从外部调整。 版权所有(C)2006,JPO&NCIPI
    • 48. 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
    • 49. 发明专利
    • Operational amplifier circuit
    • 操作放大器电路
    • JPS59107613A
    • 1984-06-21
    • JP21684582
    • 1982-12-13
    • Hitachi Ltd
    • NAGAI KENJIFUJII FUMIAKI
    • H03F3/345H03F1/08H03F3/30H03F3/34H03F3/45
    • H03F3/45188H03F1/086H03F3/3023H03F2200/153H03F2203/45398H03F2203/45508H03F2203/45631
    • PURPOSE: To make noise at a high frequency region hard to appear at an output by connecting a capacitor between a gate to a pair of active load transistor (TRs) of a differential input circuit and the circuit.
      CONSTITUTION: The capacitor C
      0 is connected between a node n'
      0 of the gate terminal of the load MOSFETM
      3 , M
      4 of the differential input circuit 1 and the grounding point of the circuit. The gate terminal of the FETM
      4 of the circuit 1 is grounded in terms of AC by the capacitor C
      0 and the FETM
      4 acts like a common gate amplifier. Thus, in connecting an output terminal to a minus input terminal and constituting a voltage follower, noise at the high frequency region superimposed on an output Vout is transmitted to a node n
      0 , but suppressed by the capacitor C
      0 . Thus, the noise is nerver amplifier nor transmitted to a node n
      1 via the FETM
      4 .
      COPYRIGHT: (C)1984,JPO&Japio
    • 目的:通过在差分输入电路的栅极与一对有源负载晶体管(TR)之间连接电容器和电路,使高频区域的噪声难以出现在输出端。 构成:电容器C0连接在负载MOSFETM3的栅极端子的节点n'0,差分输入电路1的M4和电路的接地点之间。 电路1的FETM4的栅极端子通过电容器C0以交流接地,并且FETM4像共用栅极放大器那样起作用。 因此,在将输出端子连接到负输入端子并构成电压跟随器时,叠加在输出Vout上的高频区域的噪声被发送到节点n0,但被电容器C0抑制。 因此,噪声是神经放大器,也不通过FETM4传输到节点n1。