求助大神帮我解惑啊，感激不尽！
下面是我的英文课题要求
Researchers and students insciences such as Chemistry and Biology often have to make electrical signalmeasurements as part of their work. Sometimes specialist measurement equipmentis required (such as potentiostats), but often simple meter or oscilloscopeshould be sufficient. In the later case there is often a problem with thesignals being too low level or noisy to obtain good results with basic labequipment. The ""obvious"" answer might be to purchase abetter oscilloscope with more sensitivity or built in filters, but this mightnot be affordable or justifiable, particularly if the job can be done with asimple amplifier and filter. The problem is that the science researcher willprobably not have the knowledge to create a filter circuit to do the job.Commercial general purpose filters are of course available, but again may beexpensive (or maybe this can be better in some way). A designed unit also hasthe advantage of facilitating further development of system prototypes. The aimof this project is to develop a general purpose amplifier and filter for labuse which can be easily programmed from a PC via a USB interface by someone whois not an expert in filters. The system should be designed in way thatfacilitates rapid development/incorporation of the signal processing into astand-alone embedded system if the experimental work develops to a full systemprototype or demonstrator system.
Specification include
* USB programmable, withnon-volatile member so does not need PC once set up*Amplifier gain up to 1000
* Good input protection
* Wide range of filtercharacteristics and cut-off frequencies
* AC or DC coupling
* Active offset cancellation for DCsignals
下面是我自己的翻译，翻译的不好
化学专业和生物专业的一些研究者和学生们在他们的工作中经常会测量电信号。有时候一些专业的测量设备是必须的（比如恒电位移）但是有时候一些简单的仪器或者示波器也可以处理这些问题。在后一种情况中经常会遇到信号水平太低或者有噪声干扰以至于达不到有效的测试效果。显而易见的问题解决方式是购买一个精度更高的示波器或者搭建一个滤波器，但是这种办法不是很经济和有效的，特别是一个简单的放大器和滤波器电路可以解决的问题。现在问题的关键在于其他专业科技研究者或许没有足够的电子专业知识去搭建这样一个电路。现在最有效的办法就是电子工程专业的学生搭建一个电路来解决这个问题。这个项目的目的就是建立一个在实验室可以通用的放大器和滤波器。这些器件可以轻松的通过电脑连接的USB来编程。该系统的设计应以有利于信号处理的快速发展/掺入到一个独立的嵌入式系统，如果实验工作发展到全系统的原型或演示系统的方式。
要求包括：
1．USB可编程的，具有非易失性构件，一旦开始工作就不需要PC了
2．放大器的增益可达1000
3．良好的输入保护
4．滤波特性和截止频率范围宽
5．AC或DC耦合
6．对于直流信号主动偏移取消
期待有大神可以给小弟提供有效的建议。谢谢。