RobG wrote on Nov 3rd, 2011, 7:02pm:The DC operating point will be more stable if you replace Tp with a current source. As it is drawn, the DC current will depend strongly on the power supply.
Totally agree -
In a big way, it is two diode connected devices essentially.
However, these things do work pretty well, so lets get them started.
When it gets more sophisticated you put a control system around it to adjust the power supply voltage and maintain an average current, but thats getting ahead of things.