Hello,
is there anybody who knows a structure of a high current capability drvier with:
- Slew rate control
- Output must be limited to Vref+ and Vref- (programmable voltage source basically)
- the driver must source/sink current from/into the power supply and not Vref+/-
I found some circuits ideas for the slew rate control but I couldn´t clip the output at the right Vref+/- "in an elegant way"

any circuits ideas or papers links ?

Thanks for your replay Tosei,
Actually the current starving inverter is not an option for me because the SR must be controlled over a wide range of load capacitance.
one idea is to generate a "wave form" with the proper SR followed by a SR-free buffer. my problem is how to limit the output to Vref+/-
- If I use active clippers at the driver output I will burn a lot of current inside the chip.
- Controlling the amplitude of the SR shaping waveform feeding the Buffer in a feedback loop require a huge bandwidth (the driver is supposed to work at 20MHz).

I am designing a substitute chip, and the old one has such a smooth settling behavior that I am convinced that they didn´t use a feedback loop.
It must be something else !