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DAC0832+LM324输出电压过小

Other Parts Discussed in Thread: LM324

大家好,有个疑问。利用放大器LM324对DAC0832数模转换后的电流信号进行电压转换。为什么转换后的电压输出只有零点几伏呢?反馈的问题吗?具体电路见电路图。