Chopped operational-amplifier (OP-AMP) system
    5.
    发明授权
    Chopped operational-amplifier (OP-AMP) system 有权
    斩波运算放大器(OP-AMP)系统

    公开(公告)号:US09564859B2

    公开(公告)日:2017-02-07

    申请号:US14621110

    申请日:2015-02-12

    Abstract: One example includes an OP-AMP circuit system. The system includes a signal amplification path comprising a signal amplification path comprising a signal amplifier and an output stage. The signal amplification path can be configured to amplify an input voltage received at an input to provide an output voltage via the output stage. The system also includes an offset-reduction path coupled to the input of the signal amplification path and to an output of the signal amplifier. The offset-reduction path includes a transconductance amplifier and at least one chopper that are configured to mitigate noise in the signal amplification path and a noise-filtering feedback path configured to provide chopper feedback with respect to an offset voltage associated with the offset-reduction path, the noise-filtering feedback path comprising a feedback path input coupled to the input of the transconductance amplifier via a resistor.

    Abstract translation: 一个例子包括OP-AMP电路系统。 该系统包括信号放大路径,其包括信号放大路径,该信号放大路径包括信号放大器和输出级。 信号放大路径可以被配置为放大在输入处接收的输入电压以经由输出级提供输出电压。 该系统还包括耦合到信号放大路径的输入和信号放大器的输出的偏移减小路径。 偏移减小路径包括跨导放大器和被配置为减轻信号放大路径中的噪声的至少一个斩波器以及被配置为提供关于与偏移减小路径相关联的偏移电压的斩波反馈的噪声滤波反馈路径 噪声滤波反馈路径包括经由电阻器耦合到跨导放大器的输入的反馈路径输入。

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