Howto give differences of Voltages,whenonetransistor is connected in active feedback

Sir,
I have used the Avago ATF 54143 transistor to my work and connected the one transistor to other transistor in a feedback mode. How to set the biasing for the two transistors. Feedback transistors how much voltage differences of Vds and Vgs we have to obtain, when we choose Vds= 3V and Ids=60mA.How much voltage differences we have to set for other transistor and two transistors.
If two transistors are used as cascade each other, how much difference of voltages we have to obtain at the cascading transistors.
Whether we have to obtain the absolute voltages or difference of voltages at Vgs or Vds, how much voltage we need to obtain.
I have attached the feedback transistor figure and datasheet of ATF54143 transistor