Hi,
I designed a low noise Howland current source using TLC2272,but current noise is much larger than 100pAp-p,that can't be accepted.I want to know why ,and how to analyse? Howland current source circuit involes positive feedback,I don't know its noise analysis.
voltage noise of VG1 is 4uVp-p (0.1~10Hz),RLoad =1kΩ,the output current noise could be less than 100pAp-p (0.1~10Hz),I don't know why.
