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onkeyup="$('fj_btn').href='forum.php?mod=redirect&ptid=293526&authorid=0&postno='+this.value" onkeydown="if(event.keyCode==13) {window.location=$('fj_btn').href;return false;}" title="跳转到指定楼层" /> <a href="javascript:;" id="fj_btn" class="z" title="跳转到指定楼层"><img src="static/image/common/fj_btn.png" alt="跳转到指定楼层" class="vm" /></a> </div> <strong> <a href="http://bbs.oecr.com/thread-293526-1-1.html" id="postnum1180030" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>1</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon1180030" src="static/image/common/online_member.gif" /> <em id="authorposton1180030">发表于 2016-1-13 14:51:31</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=293526&page=1&authorid=162299" rel="nofollow">只看该作者</a> <span class="none"><img src="static/image/common/arw_r.gif" class="vm" alt="回帖奖励" /></span> <span class="pipe show">|</span><a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=293526&extra=&ordertype=1" class="show">倒序浏览</a> <span class="pipe show">|</span><a href="javascript:;" onclick="readmode($('thread_subject').innerHTML, 1180030);" class="show">阅读模式</a> </div> </div> </div><div class="pct"><style type="text/css">.pcb{margin-right:0}</style><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1180030"> <div align="left"> 函数信号发生器实现方法：</div><div align="left">（1）用分立元件组成的函数发生器：通常是单函数发生器且频率不高，其工作不很稳定，不易调试。</div><div align="left">（2）可以由<a href="http://material.oecr.com" target="_blank" class="relatedlink">晶体</a>管、运放IC等通用器件制作，更多的则是用专门的函数信号发生器IC产生。早期的函数信号发生器IC，如L8038、BA205、XR2207/2209等，它们的功能较少，精度不高，频率上限只有300kHz，无法产生更高频率的信号，调节方式也不够灵活，频率和占空比不能独立调节，二者互相影响。</div><div align="left"> （3）利用单片集成芯片的函数发生器：能产生多种波形，达到较高的频率，且易于调试。鉴于此，美国美信公司开发了新一代函数信号发生器ICMAX038，它克服了（2）中芯片的缺点，可以达到更高的技术指标，是上述芯片望尘莫及的。MAX038频率高、精度好，因此它被称为高频精密函数信号发生器IC。在锁相环、压控振荡器、频率合成器、脉宽调制器等<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电路</a>的设计上，MAX038都是优选的器件。</div><div align="left"> （4）利用专用直接数字合成DDS芯片的函数发生器：能产生任意波形并达到很高的频率。但成本较高。</div><div align="left"><font face="Calibri"><font style="font-size:10.5pt"> </div><div align="left">以上信息由西安安泰<a href="http://opticaltest.oecr.com" target="_blank" class="relatedlink">测试</a>设备有限公司整理，希望对您能有所帮助。西安安泰测试设备有限公司是一家专注于<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>测试及工业测试领域仪器销售与仪器维修的专业公司。为客户提供“丰富的测试<a href="http://b.oecr.com/sell" target="_blank" class="relatedlink">产品</a>选择、完整的系统测试解决方案、专业的测试<a href="http://opticaldesign.oecr.com" target="_blank" class="relatedlink">软件</a>开发、全面的技术支持及售后服务”。目前公司主要进行电子测试仪器的销售及维修，自研产品的开发，已经成为西北地区规模最大的仪器综合服务商之一。</div><div align="left"> </div><div align="left"> 测试仪器维修事业部拥有多名丰富维修经验的高级工程师，能够完成各种测试仪器与测试系统的芯片级维修。我们提供免费样机试用，免费专业工程师培训，免费测试技术交流。 <br /> 我们秉承全心全意为客户服务的原则，以合理的价格，让用户获得满意，<br /> 公司优势<br /> • 西北唯一能够进行测试仪器芯片件及维修的专业公司帮助客户降低维修成本。 <br /> • 西北地区专业维修测试仪器，修复的仪器全部经过校准，为您提供最高质量的仪器维修服务。 <br /> • 西北地区首家具备出具中华人民共和国修理计量器具许可证的仪器维修公司。 <br /> • 专业的检测维修手段，打破国外厂家对高端仪器维修垄断，终结国外厂家维修的暴利时代。</div><div align="left"> </div><div align="left">咨询电话：029-88353093</div><div align="left">网站：www.agitek.com.cn</div><div align="left"> </div><div align="left"> </div><div align="left"> </div></font></font></td></tr></table> <div class="ptg mbm mtn"> <a title="锁相环" href="misc.php?mod=tag&id=2613" target="_blank">锁相环</a>, <a title="信号发生器" href="misc.php?mod=tag&id=1249" target="_blank">信号发生器</a>, <a title="有限公司" href="misc.php?mod=tag&id=1301" target="_blank">有限公司</a>, <a title="振荡器" href="misc.php?mod=tag&id=515" target="_blank">振荡器</a>, <a title="合成器" href="misc.php?mod=tag&id=3179" target="_blank">合成器</a></div> </div> <div id="comment_1180030" class="cm"> </div> <div id="post_rate_div_1180030"></div> </div> </div> </td></tr> <tr><td class="plc plm"> <div id="p_btn" class="mtw mbm hm cl"> <a 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