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用F741运放接成同相放大器 ,用稳压二极管将反相输入端电位拉低 50mV ,组成±50mV双极型模拟信号→ 0 - 5V标准AD输入信号转换电路
F741 op amp connected into a noninverting amplifier, with a Zener diode to invert the input potential of 50mV, composed of ± 50mV bipolar analog signal → 0 - 5V standard AD input signal conversion circuit