Hi,

I designed and implemented a log amplifier that requires fixed voltage shift (bias) of its output. For that I added an adding voltage follower, but I am unable to get the voltage to be lineary shifted as required.

The expected voltage shift is significantly lower than expected of an adding circuit and is not linear.

Can anyone help with a working solution?

See attached schematics.

I designed and implemented a log amplifier that requires fixed voltage shift (bias) of its output. For that I added an adding voltage follower, but I am unable to get the voltage to be lineary shifted as required.

The expected voltage shift is significantly lower than expected of an adding circuit and is not linear.

Can anyone help with a working solution?

See attached schematics.