Bench Power supply circuit is nearly ready!

Hi,

   So we are getting very close. The first circuit creates our un-regulated supply, a 38V supply for the op-amps for the circuitry and a 12V supply for the internal cooling fan.

Then we have an op amp based power supply design with current limiter based on the LT3080 voltage regulator. In this circuit we are using 2 in series to double the amount of current we can deliver. These regulators rely on a minimum load of 1mA generated by I1. I2 is simply for testing (to represent the load on the output of the supply). This supply should give between 32V and 0V, and 0A to 4A. I believe that the transformer I have will only provide 0.5A at 48V, but I have designed the circuit to support more current if I choose to change the transformer in the future.

This has taken me over a month, and is only what I guess is a 'first draft'. I need to get some people who really know how these things work to give it a once over before I start designing the PCB!