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    • 75. 发明申请
    • AUTOMATIC GAIN CONTROL CIRCUIT
    • 自动增益控制电路
    • US20140097901A1
    • 2014-04-10
    • US14114519
    • 2012-06-29
    • Kimikazu SanoHiroyuki FukuyamaMakoto NakamuraHideyuki NosakaMiwa MutohKoichi Murata
    • Kimikazu SanoHiroyuki FukuyamaMakoto NakamuraHideyuki NosakaMiwa MutohKoichi Murata
    • H03G3/30
    • H03G3/30H03G3/3084
    • An automatic gain control circuit (5a) includes a peak detector circuit (10) that detects the peak voltage of the output signal from a variable gain amplifier (3), an average value detection and output amplitude setting circuit (11) that detects the average voltage of the output signals from the variable gain amplifier (3) and adds a voltage ½ the desired output amplitude of the variable gain amplifier (3) to the average voltage, and a high gain amplifier (12) that amplifies the difference between the output voltage of the peak detector circuit (10) and the output voltage of the average value detection and output amplitude setting circuit (11) and controls the gain of the variable gain amplifier (3) using the amplification result as a gain control signal. The peak detector circuit (10) includes transistors (Q1, Q2, Q3), a current source (I1), and a filter circuit. The filter circuit includes a series connection of a resistor (Ra) and a capacitor (C1).
    • 自动增益控制电路(5a)包括检测来自可变增益放大器(3)的输出信号的峰值电压的峰值检测电路(10),检测平均值的平均值检测和输出幅度设定电路(11) 来自可变增益放大器(3)的输出信号的电压,并将可变增益放大器(3)的期望输出幅度的电压½加到平均电压上;以及高增益放大器(12),放大输出 峰值检测器电路(10)的电压和平均值检测和输出幅度设置电路(11)的输出电压,并且使用放大结果作为增益控制信号来控制可变增益放大器(3)的增益。 峰值检测器电路(10)包括晶体管(Q1,Q2,Q3),电流源(I1)和滤波器电路。 滤波电路包括电阻(Ra)和电容器(C1)的串联连接。
    • 77. 发明授权
    • Signal output circuit
    • 信号输出电路
    • US08593201B2
    • 2013-11-26
    • US13527510
    • 2012-06-19
    • Kimikazu SanoHiroyuki FukuyamaHideyuki NosakaMakoto NakamuraKoichi MurataMasatoshi TobayashiEisuke Tsuchiya
    • Kimikazu SanoHiroyuki FukuyamaHideyuki NosakaMakoto NakamuraKoichi MurataMasatoshi TobayashiEisuke Tsuchiya
    • H03L5/00
    • H03K19/017545
    • In a signal output circuit, an input buffer externally receives a single-phase switching instruction signal to switch a state of the output circuit a shutdown disable state or a shutdown enable state, and converts and outputs the single-phase switching instruction signal into a differential switching instruction signal. A generation control circuit outputs a generation control signal for controlling generation of a control voltage in the control voltage generation circuit based on the differential switching instruction signal. A control voltage generation circuit outputs the control voltage upon changing a value of the control voltage in accordance with a logic of the single-phase switching instruction signal. An output circuit externally receives a differential input signal, outputs a differential output signal upon impedance-converting the differential input signal, and switches between the shutdown disable state and the shutdown enable state of the differential input signal.
    • 在信号输出电路中,输入缓冲器从外部接收单相开关指令信号,以将输出电路的状态切换到关闭禁止状态或关断使能状态,并将单相切换指令信号转换并输出到差分 切换指令信号。 一代控制电路根据差动切换指示信号输出用于控制控制电压产生电路中的控制电压产生的发电控制信号。 控制电压产生电路根据单相切换指令信号的逻辑改变控制电压的值来输出控制电压。 输出电路从外部接收差分输入信号,通过对差分输入信号进行阻抗转换来输出差分输出信号,并在差分输入信号的关断禁止状态和关断使能状态之间切换。