Dear all,
I am trying to build a simple filtering stage for baseband signals. Therefor I use an Opa301. The Problem is that when I want to filter a sinusoidal signal with a DC offset of 2.1V and amplitude of 100mV something strange happens if my power supply is 3 V. However when I increase the voltage of Vcc, eg to 5V, the problem vanishes at some point. Of course, by using an ideal OPamp, this behaviour doesn't occure neither.
Can somebody give me a hint?
Thank you a lot in advance!
Best regards,
Ben
