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    • 42. 发明公开
    • 자동영점화 전류 피드백 기기 증폭기
    • AUTOZEROING电流反馈仪表放大器
    • KR1020080101784A
    • 2008-11-21
    • KR1020080045632
    • 2008-05-16
    • 내셔널 세미콘덕터 코포레이션
    • 페르티즈스미키엘레이츠마게오르게
    • H03F3/45
    • H03F3/387H03F3/45475H03F3/45977H03F2200/261H03F2203/45048H03F2203/45076H03F2203/45138H03F2203/45534
    • An auto-zero current feedback instrumentation amplifier has a low offset to an input and a spurious switching signal of a low level in a low input current and a low output. An instrument amplifier includes an output terminal(310) generating the output voltage, and the low frequency path connected to the output terminal and a high frequency path connected to the output terminal. A first input terminal(320) senses the differential input and produces the first intermediate current based on the differential input. A first feedback stage(330) is connected to the first input terminal and the output terminal, and produces the first feedback current based on the output voltage. An auto-zero circuit(340) is connected to the input terminal, and the feedback stage and output terminal, and produces the nulling current compensating for the errors inside the first intermediate current derived from the input offset inside the first input terminal and the first feedback stage. A high frequency path is connected to an output stage and holds a dominant position in the frequency exceeding the specific frequency in the low frequency route.
    • 自动零电流反馈仪表放大器在低输入电流和低输出端具有低输入偏移量和低电平的寄生开关信号。 仪器放大器包括产生输出电压的输出端子(310)和连接到输出端子的低频路径和连接到输出端子的高频路径。 第一输入端子(320)感测差分输入端并基于差分输入产生第一中间电流。 第一反馈级(330)连接到第一输入端和输出端,并且基于输出电压产生第一反馈电流。 自动归零电路(340)连接到输入端子和反馈级和输出端子,并产生归零电流补偿由第一输入端子内的输入偏移导出的第一中间电流内的误差,第一 反馈阶段。 高频路径连接到输出级,并且在低频路径中保持超过特定频率的频率的主要位置。