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在横流控制的截图中,利用MosFET来控制恒流特性就比较常见的方法,对于小电流有的时候也用双极晶体管来代替.但是图中反向输入端与输出端连接的电容作用如何?是为了改善响应特性嘛?这种接法我以前没有看到过,还请各位指教,最好告知相应资料!多谢!
但是我对其进行了小电流的实验,发现6mA时响应时间过长,约为7ms左右;随着电流的增加,响应时间缩小,如至24mA时,响应时间小于2ms.请问:如何改善这种情况?通过仿真加实验?有何理论依据?