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micpq
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樓主  發(fā)表于: 2008-01-23 00:57
一個(gè)脈沖到底是多長(cháng)時(shí)間
cvlsam
富士低壓，POD（觸摸屏），PLC專(zhuān)賣(mài)
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1樓  發(fā)表于: 2008-02-12 20:49
一個(gè)脈沖是多長(cháng)？這就引入了脈沖寬度這個(gè)概念，其反映的是信號有0到1再由1到0的時(shí)間段，正像PLC指令中PWM方式一樣，通過(guò)調整脈沖寬度就可以改變脈沖的頻率。

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