I have implemented the attached circuit.
It is working in simulation, but it didn’t work in real circuit.
Please help me to find out the problem.
The problem is voltage at “sink voltage” node is fixed at
4.6V, when I change R28 to another value such as 20K or 30K; the “sink voltage”
node is still at 4.6V
Very appreciate your any answers.
Best Regards.
