很喜欢《电子制作》,特别是其中有关电路设计方面的文章。去年第十期刊登的《开关充电器电路设计》,是徐世锋先生经过反复实验和修改后,献给读者的一篇佳作。文章中也提到几个问题:其中之一为什么作为比较器使用的运放A2其输出波形不是我们希望的矩形波呢?《编者点评》中认为,这是A2反相输入端的电位在开关切换瞬间发生波动造成的。对此,我另有体会。多年以前,在进行开关电源设计制 I really like “electronic production,” especially the articles on circuit design. The “Switching Charger Circuit Design” published in the tenth issue of last year is a masterpiece dedicated by Xu Shifeng to his readers after repeated experiments and modifications. The article also mentioned several questions: One of the reasons why as a comparator using the op amp A2 its output waveform is not what we want the rectangular wave? “Editor’s Comments” that this is the A2 inverting input potential switch Instantaneous fluctuations caused by. In this regard, I have another experience. Years ago, switching power supply design