LM4780 功放专题!

万健

又是一片二个声道，估计比3886 3875没什么长进！

jone1919

上面的那图不清楚。

rabbit

以下是引用ats909在2005-2-8 14:28:00的发言：
rabbit  兄第六楼的图纸是我2003年夏天的PCB设计~
两路并联的~

未经领导同意，擅自发领导的设计图，请领导批评，呵呵

莫明

jjbooo

单片推书架箱足已,,我就喜欢单片

小鬼头

我的目标是用三块LM4780（双通道功放IC）作成BI-AMP，即分放大器玩法，具体是两块LM4780以并联（每块LM4780内部的两通道相并联）形式推低音、一块不并联推高音。。。既玩并联，又玩BI-AMP，嘿嘿[em06]

还准备吸收上次装制LM3875时的经验，重点是在电源和输出网络处作些调整。电源准备仍使用LM3875的SNUBBER网络（即下面原理图中R9、C5以及R10、C6，的以抑制大电容的谐振）的方法来使用滤波大电容（只限于低频通路，高频通路我准备只用1000U的小电容作电源滤波），还准备针对电源变压器使用类似的手段，通过加进ZOBEL网络（初定是0。3欧姆+0。47U并在变压器的次级绕组，其中0。3欧姆是故意取接近于次级绕组直流电阻的值）来抑制它的内部谐振，以期取得更好的声感。。。

http://www.hifidiy.net/dispbbs.asp?BoardID=2&replyID=34970&id=4215&star=1&skin=0


之前，一直没啥时间[em10]，现在终于有一些进展。。。


我安装LM4780的方法与SAGAQWE兄的不谋而合。。。借他的图用用



这是SAGAQWE兄初试LM4780的报告
http://www.hifidiy.net/dispbbs.asp?boardID=2&ID=7639&skin=0

这些图片才是我的[em11]
<img src="attachments/dvbbs/2005-2/2005219231758973.jpg" 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/2005-2/2005219231758973.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-2/2005219231820633.jpg" 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/2005-2/2005219231820633.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-2/2005219231832487.jpg" 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/2005-2/2005219231832487.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-2/2005219231848639.jpg" 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/2005-2/2005219231848639.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

小钳子

PL

文招

[em09][em09][em09]

土八路

装入有源音箱最好！[em09][em09][em09][em09]

teco

DIY不仅要电路好, 工艺, 造型也要好!

墨西哥跳豆

aeon

[em09][em09][em09]

小鬼头

前天买了机箱,星期天一天在开孔....刚开完....还有接线....[em00]

小鱼儿

别致的造型，精致的做工[em09][em09]

l-k

有谁三块都做过？

7r093

把门锁好哦，小心雅贼哦。哈哈。。。。。[em09][em09][em09]

HQ

<img src="attachments/dvbbs/2005-2/200522219592273.jpg" 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/2005-2/200522219592273.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />


[em09][em09][em09][em11][em11]

小鬼头

呵呵[em05]


http://www.diyaudio.com/forums/showthread.php?s=&postid=581378#post581378

zhang3

现在好了。。

[em11]

zhang3

http://www.diyaudio.com/forums/showthread.php?s=&postid=581378#post581378