For a lab experiment we are required to build an op-amp circuit according to instructions provided. However, the instruction given is rather vague and a lot of steps are omitted. I've pretty much completed the circuit, but for some reason the gain is only in the thousands. The specifications demand at least 500k Av while consuming less than 5mA. Here is how my circuit looks like. It's made up of a current mirror, Widlar circuit, common emitter voltage amplifier as well as a common collector stage for the buffer. Vout is measured in the output stage. Is there anything wrong with the circuit?