標(biāo)準(zhǔn)UC3843的BUCK直流降壓波形很好就是有負(fù)尖(見(jiàn)圖)?

標(biāo)準(zhǔn)UC3843的BUCK直流降壓波形很陡就是有負(fù)尖(見(jiàn)圖)?

120k波形很好,但上管關(guān)斷時(shí)總有一個(gè)負(fù)尖脈沖(如圖右上角),
請(qǐng)問(wèn)大俠們,為什么?該如何消除?

驅(qū)動(dòng)端已加肖特基

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dragonbtv

LV.4

2005-09-05 09:59

500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/33/1125885547.jpg');}" onmousewheel="return imgzoom(this);">

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huitengda

LV.5

2005-09-05 21:41

@dragonbtv

[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/33/1125885547.jpg');}"onmousewheel="returnimgzoom(this);">[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/33/1125885559.jpg');}"onmousewheel="returnimgzoom(this);">

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