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d.innerHTML = d.innerHTML + '<a class=\"download_word download_word_lb\" href=\"javascript:;\" id=\"vipdown\" onclick=\"showpay(2)\"><div class=\"download_card\"><div class=\"card_nr card_nr_lb\"><h4 class=\"card_bt\">rc串并联正弦波振荡电路原理图</h4><div class=\"download_card_msg\">正弦波振荡器_模拟电子技术 
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&ensp;&ensp;&ensp;&ensp;RC正弦波振荡电路通常用在振荡信号频率为几十千赫的情形。RC正弦波振荡电路是利用电阻R和电容C作为选频网络的振。下面小编给大家分享rc串并联正弦波振荡电路原理图，希望能帮助到大家。 rc串并联正弦波振荡电路原理图文档下载网址链接：</div></div><div class=\"download_card_btn download_card_btn_lb\"><div class=\"content_box_tj\"><span>推荐度：</span><img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\"></div><div class=\"downlod_btn_right demo_tc downlod_btn_right_lb\"><em class=\"downlod_icon\"></em>点击下载文档<span>文档为doc格式</span></div> </div></div></a>';
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