拆公房

小鬼头 · 发表于 2006-8-7 10:27

<div class="quote">以下是引用zjf001在2006-7-29 16:13:00的发言： <img src="attachments/dvbbs/2006-7/200672916124557669.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/2006-7/200672916124557669.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> </div>请问图中最左下角（2K电阻左边）的NPN管子是靠近散热器，还是远离散热器？

zjf001 · 发表于 2006-8-7 10:09

高兴第一个加精，除末级功率MOSFET管外，没有三极管(二极管)安装在散热器上，他的工作电流是50MA.

小鬼头 · 发表于 2006-8-7 09:22

<div class="quote">以下是引用zjf001在2006-7-29 16:13:00的发言： <img src="attachments/dvbbs/2006-7/200672916124557669.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/2006-7/200672916124557669.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> </div>这个图有新意.看上去至少有四级放大.也因此前面两级可以使用+/-15V的电源和耐压低的管子.第三级的A970增益比较低,主要起电平转移的作用,第四级的同极性管的驱动方法与金田明彦的完全对称放大器类同。第三级另一臂的C2240之上通过一只二极管加有负反馈,这里的原理没搞懂,可能是相位补偿之需.另外,没搞懂的还有他的末级功放管的静态电流稳定(补偿)方法.照片里没看清楚,想请教楼主————除末级功率MOSFET管外，哪只三极管(二极管)安装在散热器上？或者很靠近散热器？顺便加精.