TL084：带通滤波器

Hello Junqi,

I'm not sure what type of filter you are looking to build, but here are many example circuits for many analog functions. https://www.ti.com/design-development/analog-circuits.html

When using TL084 at 5V supply, please note the valid input and output common-mode ranges.

The following screenshot from the datasheet is for a supply voltage of +/-15V

Best,
Jerry