前级放大0-100倍可调(最好是opa627),滤波3-20k待定,后级放大0-100倍可调,录音,存储(采样率不低于48khz,16位)。要求底噪平稳,不失真。波形底噪波形平整,上下对称。会做的联系qq2630530160,或留联系方式
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你好:
很多低噪运放都可以选,例如NE5542,LM4562,OPA2604。
参考电路datasheet上都有,具体的滤波参数,可以注册my.ti.com的会员,登陆下载filter pro软件,利用软件计算即可。