这个一个关于红外接电路设计问题：DUT发出红外光，我们设计红外接收电路。  目前收集的红外发射电路设计的信息如下：1.       DUT使用的红外发射二极管型号:SFH4725S.（发射驱动电路没有）。接收电路要求（客户提出）如下：1.      Thecircuit must transmit a 38.4kHz square wave with good signal shape2.      Ideallysignals at their destination will have a smooth monotonic edge with noovershoot. For a 50% duty cycle clock, a general3.      ruleof thumb is to be high at least 1/3 of the period and low at least 1/3 of theperiod. This leaves at most another 1/3 of the period to spend in transition. 我目前设计了一个电路：使用HS0038B这个红外接收头。但是客户不同意。客户不同意的原因如下：as the below block diagram shows, in the HS0038 there is avariable-gain amplifier with AGC which allows the circuit to work with very lowirradiance. This means that the DUT emitter could be mis-assembled or evenblocked, and we would still detect the signal. I asked for a solution to thelow-bandwidth problem I cited, that would be of the emitter-follower type。现在寻找大家帮助，怎么解决这个问题。


补充内容 (2016-1-30 14:43):
虽然这个不是最佳答案，但是感谢jack的回复。现在用TC7SH17F已经验证成功了。