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Pspice電路仿真求助(急需)

大家好??!我現(xiàn)在有問(wèn)題向各位老師請(qǐng)教?。以谧鲭娐返模粒茫樱祝牛牛蟹抡媸浅霈F(xiàn):No AC sources -- AC Sweep ignored!!!
請(qǐng)問(wèn)我該怎么改電路啊?
我現(xiàn)在急用?。≈x謝了?。?img src="http://u.dianyuan.com/bbs/u/30/1118039177.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20" onload="if(this.width>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/30/1118039177.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
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2005-06-06 21:53
將Vsin 換成Vac 試試
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