This is the full statement :
Design a RC Wien bridge oscillator with the following FEATURES:
***********Adjustable oscillation frequency [3 ÷ 9] [KHz];
********** Output load 300 [Ω];
***********Automatic control of the oscillation amplitude achieved with TEC-J;
Output oscillation amplitude [10] [V];
Powered circuit will have a reactive stabilizer and regulator element series.
NOTE: You can only use bipolar transistors and TEC-J, βA723.
I need some guides, maybe a small scheme to understand better if you can. I understood what you tryed to tell me that is without purpose....