For positive inputs, A1 operates as a normal amplifier connected to the A2 summing point through resistor, R5.
输入大于零时，A1起放大作用，输出经电阻R5连到A2的求和节点。
In the case of ideal operational amplifier, circuit analysis was simplified by the ideal summing point restraints of zero voltage and zero current at the inverting input.
对于理想的运算放大器而言，通过倒相输入处零电压和零电流的理想求和点限制，可以简化电路分析过程。
After summing up the main point in the text, points out the direction for further research.
在对全文的主要观点和不足进行了总结之后，指出了今后进一步研究的方向。
In the third, it mainly discussed the defects in the transformation theory and point out that the main defect is too simple on the summing up to the study of literature theory in 1990s.
第三章主要论述转型理论的局限，指出转型理论有将九十年代复杂的现实情况简单化处理的倾向。
In the third, it mainly discussed the defects in the transformation theory and point out that the main defect is too simple on the summing up to the study of literature theory in 1990s.
第三章主要论述转型理论的局限，指出转型理论有将九十年代复杂的现实情况简单化处理的倾向。
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