TechnoGilles
New Member
Hi all,
I'm designing simple first order active low-pass filters with op-amps. I work in single supply inverting configuration. In this configuration, my op-amp positive terminal is fed with my mid-supply buffered bias (2.5V).
What confuses me when reading the litterature (datasheets, tutorials, sample circuits, ...) is that sometimes, the mid-supply is fed directly, and sometimes it is feed through a resistor.
What are the factors to consider when deciding if/when/what resistor to use ?
Thanks !
I'm designing simple first order active low-pass filters with op-amps. I work in single supply inverting configuration. In this configuration, my op-amp positive terminal is fed with my mid-supply buffered bias (2.5V).
What confuses me when reading the litterature (datasheets, tutorials, sample circuits, ...) is that sometimes, the mid-supply is fed directly, and sometimes it is feed through a resistor.
What are the factors to consider when deciding if/when/what resistor to use ?
Thanks !