A network having a current mirror comprising: a output transistor having a gate electrode for controlling a first current between a first electrode and a second electrode, the first electrode being coupled to a positive reference potential and the second electrode being connected to ground. A second transistor has a gate electrode for controlling a second current between a first electrode and a second electrode of the second transistor. The gate electrodes are connected together to produce the first current and the second current with equal current densities. A first portion of current from a current source is fed to the first electrode of the second transistor and a second portion of current from the current source is fed to a bias voltage producing circuit producing a bias voltage at the gate electrode of the output transistor for tracking variations in the first current passing through the output transistor.