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    • 35. 发明授权
    • Differential amplifier
    • 差分放大器
    • US07868695B2
    • 2011-01-11
    • US12091417
    • 2006-08-02
    • Kazuhisa IshiguroYoshiaki Takahashi
    • Kazuhisa IshiguroYoshiaki Takahashi
    • H03F3/45
    • H03F3/45183H03F2203/45364
    • A differential amplifier circuit at the input stage is configured with a twin differential type having a first differential amplifier circuit (11) and a second differential amplifier circuit (12), respective outputs of which are received by a first and a second source-grounded amplifier (M5, M10). The second source-grounded amplifier (M10) is connected to a current mirror circuit (M11, M12), which is driven by the drain current of the second source-grounded amplifier (M10). With this configuration, the dynamic range for the upper half portion of an alternating signal output from an output terminal (OUT) is determined by the current supply capability of the first source-grounded amplifier (M5) and the dynamic range for the lower half portion is determined by the current supply capability of the second source-grounded amplifier (M10). This eliminates the need of a constant current circuit of a large current for generating a signal having lower half portion in which the waveform distortion is improved.
    • 输入级的差分放大器电路配置有具有第一差分放大器电路(11)和第二差分放大器电路(12)的双差分型,其各自的输出由第一和第二源极接地放大器 (M5,M10)。 第二源极接地放大器(M10)连接到由第二源极接地放大器(M10)的漏极电流驱动的电流镜电路(M11,M12)。 利用这种配置,从输出端子(OUT)输出的交流信号的上半部分的动态范围由第一源极接地放大器(M5)的电流供应能力和下半部分的动态范围 由第二源极接地放大器(M10)的电流供应能力确定。 这消除了用于产生具有其中波形失真提高的下半部分的信号的大电流的恒流电路的需要。
    • 37. 发明申请
    • DIFFERENTIAL AMPLIFIER
    • 差分放大器
    • US20100001797A1
    • 2010-01-07
    • US12091417
    • 2006-08-02
    • Kazuhisa IshiguroYoshiaki Takahashi
    • Kazuhisa IshiguroYoshiaki Takahashi
    • H03F3/45
    • H03F3/45183H03F2203/45364
    • A differential amplifier circuit at the input stage is configured with a twin differential type having a first differential amplifier circuit (11) and a second differential amplifier circuit (12), respective outputs of which are received by a first and a second source-grounded amplifier (M5, M10). The second source-grounded amplifier (M10) is connected to a current mirror circuit (M11, M12), which is driven by the drain current of the second source-grounded amplifier (M10). With this configuration, the dynamic range for the upper half portion of an alternating signal output from an output terminal (OUT) is determined by the current supply capability of the first source-grounded amplifier (M5) and the dynamic range for the lower half portion is determined by the current supply capability of the second source-grounded amplifier (M10). This eliminates the need of a constant current circuit of a large current for generating a signal having lower half portion in which the waveform distortion is improved.
    • 输入级的差分放大器电路配置有具有第一差分放大器电路(11)和第二差分放大器电路(12)的双差分型,其各自的输出由第一和第二源极接地放大器 (M5,M10)。 第二源极接地放大器(M10)连接到由第二源极接地放大器(M10)的漏极电流驱动的电流镜电路(M11,M12)。 利用这种配置,从输出端子(OUT)输出的交流信号的上半部分的动态范围由第一源极接地放大器(M5)的电流供应能力和下半部分的动态范围 由第二源极接地放大器(M10)的电流供应能力确定。 这消除了用于产生具有其中波形失真提高的下半部分的信号的大电流的恒流电路的需要。