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线性直流电源
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牛力 from 06C.S.E.
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Apr 16, 2009, 1:03:24 AM
4/16/09
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to 复旦电子设计竞赛讨论组
请大家多多指教啊!
刚刚传了开题报告上去,图上参数有点问题,R16应该是0.7,算好后忘记在图中改过了,望谅解。
G.M.Chen
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Apr 16, 2009, 9:17:11 AM
4/16/09
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to 复旦电子设计竞赛讨论组
报告很详细,也比较规范,很好。
有几个问题:
第一、辅助电源没有说明怎么获得,而且10V对地也是不对的,应该接到主电源的输出端。
第二、作为恒流源的JFET,没有说明其主要参数IDSS的大小,以及这个电流与差分放大器的静态工作点的关系。
这两个问题,反映一个问题,就是你们对于这个电路的理解。我估计你们这个电路是参考了某个资料的(也可能是我武断),参考是必须的,况且你们还是刚入门
者。但是必须理解电路,才能从别人的设计中学到技巧、得到灵感。
kay from 06C.S.E.
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Apr 16, 2009, 11:10:39 AM
4/16/09
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to 复旦电子设计竞赛讨论组
感谢陈老师的指点!
这个电路图的确是我们根据相关资料的样本修改的。只不过在原始的电路图上,没有JEFT作为差分放大器的负载,我们想到使用JEFT的高动态内阻会使得
性能变优,但却没有进一步的对其直流工作点等进行核算,这是我们设计上的失误,谢谢老师帮我们指出。
而辅助电源也是我们的疏忽,我们误认为是由仪器提供的,并且当时也没有完全弄懂接在调整管中9013发射级的原因,所以想当然得就将他接地处理了。
我们接下来会继续对这个电路进行分析,真正理解并优化电路。
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