有源滤波器

CQUPT幸运

LoktikVJ 发表于 2022-5-10 19:00
if something is not clear in picture, I can explain, I used this idea many many times and it worked  ...

请问一下，这种方案精度能做到多少呢

LoktikVJ

you can design circuits without articles)))) it's a pretty simple idea, actually
filter tuning accuracy is usually determined by time you can have for calibration and number of cap tuning bits. f3db mism was less than 1%
filter amplitude response after RC calibration: