Changes

The [http://www.ti.com/lit/ds/symlink/lm134.pdf LM334] provides a bias to the current amplifier circuit as seen above. The configuration of the LM334 is shown in the figure below. This is a modified figure taken from LM334.

[[File:lm334source.png|thumb|250px|LM334 configuration used for biasing the output transistors]] The LM334 is configured as a "Zero Temperature Coefficent Current Source". This means that the bias current is immune to ambient temperature changes and ensures the circuit operating point remains stationary.