koy 发表于 2004-10-27 19:53

看的楼主的分析,受益匪浅啊!

可惜没有见到楼主设计的『单极点、单级放大OP模块』的线路。

wensan 发表于 2004-11-1 00:48

「单极点、单级放大器」另有专文探讨。

「单极点、单级放大器」另有专文探讨。(如果我有时间的话!)

小鬼头 发表于 2004-11-1 08:47

WENSAN兄所说的线路是否近似于

日本人所称的一段增幅放大器线路呢?

wensan 发表于 2004-11-1 10:12

一段增幅放大器线路?

以下是引用小鬼头在2004-11-1 8:47:00的发言:
日本人所称的一段增幅放大器线路呢?


我不清楚日本人所称的一段增幅放大器线路是什么?

koy 发表于 2004-11-3 18:50

"单极点、单级放大器"

顾名思义,是否是单级、单端放大线路?

001焦外 发表于 2005-2-2 18:34

我是菜鸟,问个问题

这个线路能工作吗?为什么不能消除噪声?
<img src="attachments/dvbbs/2005-2/200522183249364.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200522183249364.gif\');}" onmousewheel="return imgzoom(this);" alt="" />
谢谢

blasterno1 发表于 2006-9-1 10:48

<p><strong><font face="Verdana" color="#da2549">wensan消失了吗?</font></strong></p><p></p>

阿四 发表于 2006-9-10 20:17

<p>hen yi han ,kan bu dao tu le!</p>

ReadOnly 发表于 2006-12-3 23:59

jstwjw 发表于 2006-12-4 00:19

<p>非常好的探索,这个问题值得研究。我开始也以为很简单,用4个运放搭一下就行了,仔细想了进去,发现这里面非常难解决共模电压的消除。后来用分立元件来解决,用无反馈放大电路,精度是低了点,但能达到1%,对音响也能马马虎虎用用,用于仪表就不行了。</p>

jillking 发表于 2006-12-5 09:44

呵呵!有一个方法倒是简单啊,把前级的地往下拉,后级为实地,就可以了.绝对对称,处理澡声的方法可不容易啊!

bnm 发表于 2006-12-5 12:17

很敬佩WENSAN的探讨精神,<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">多年前曾试验过几款单端转平衡输出的电路,输入正弦波或三角形波时,用示波器“李沙育图形”分别察看其输出端时:</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">用集成运算放大器组成的负相放大器(反馈电容</span><span lang="EN-US"><font face="Times New Roman">20P</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">)构成的平衡输出电路在工作频率</span><span lang="EN-US"><font face="Times New Roman">20KHz</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">及以下时,其相位差基本难于看出,至</span><span lang="EN-US"><font face="Times New Roman">30KHz</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">时约有</span><span lang="EN-US"><font face="Times New Roman">1.5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">度的相位差,至</span><span lang="EN-US"><font face="Times New Roman">100KHz</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">时约有</span><span lang="EN-US"><font face="Times New Roman">7</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">度左右,至</span><span lang="EN-US"><font face="Times New Roman">300KHz</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">以上时,采用不同的集成运算放大器时,其相位差开始有差异,</span><span lang="EN-US"><font face="Times New Roman">OPA2604</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span><span lang="EN-US"><font face="Times New Roman">NE5532</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">约为</span><span lang="EN-US"><font face="Times New Roman">27</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">度,</span><span lang="EN-US"><font face="Times New Roman">OPA2134</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span><span lang="EN-US"><font face="Times New Roman">EL2244</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">约为</span><span lang="EN-US"><font face="Times New Roman">21</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">度,</span><span lang="EN-US"><font face="Times New Roman">AD827</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">约为</span><span lang="EN-US"><font face="Times New Roman">17</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">度。</span></p><p class="MsoNormal" style="MARGIN

vdeedomen 发表于 2006-12-5 13:08

又学到DD了.......楼主来个真正的平衡电路来....我想做哦.......谢谢先咯.....

wensan 发表于 2006-12-5 13:30

<p>http://www.diysong.com/images/ultras/UltraSymmetryPreAMP.htm</p><p>&nbsp;</p>http://www.diysong.com/images/ultrapoweramp/UltraSymmetryPowerAMP.htm

济公 发表于 2006-12-5 13:30

<p><strong>WENSAN师傅你把信号频率改成10K试试,可能没有你想的延迟.你1000K的频率对运放的要求是要高的,对线路的要求也是要高的!如果你改个高速运放可能也不会有这个延时出现.</strong></p><p><strong></strong>&nbsp;</p><p><strong>我猜的!</strong></p>

vdeedomen 发表于 2006-12-5 15:01

<div class="quote"><b>以下是引用<i>wensan</i>在2006-12-5 13:30:00的发言:</b><br/><p>http://www.diysong.com/images/ultras/UltraSymmetryPreAMP.htm</p><p>&nbsp;</p>http://www.diysong.com/images/ultrapoweramp/UltraSymmetryPowerAMP.htm</div><p></p>打开不了的??.......

lhl20000 发表于 2006-12-5 16:26

可以打开啊,还挺快的.不过我还是喜欢关注版主的过程多点.呵呵

chhw007 发表于 2007-1-16 15:47

<p>有PBC吗?我需要两块</p>

xiaoao360 发表于 2007-3-2 09:57

<br/><br/>

特特 发表于 2007-3-2 10:02

<p>电路很好,但用了运放就有档次不高的感觉。搞成分立件就好了。</p>
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