Patent ID: 7969236

Claim:
A core circuit for a reference current generation circuit, comprising: a first transistor in a first current path, having a drain coupled to a first node of a bias circuit for sourcing a first current to the core circuit; a second transistor in a second current path, having a gate coupled to the gate of the first transistor, a drain coupled to a second node of the bias circuit, and configured to source a second current through the second node; a third transistor, having a gate coupled to the gates of the first and second transistors, a drain coupled to the drain of the second transistor and the bias circuit through the second node, wherein the gates of the first, second, and third transistors are also coupled to the second node, and the third transistor is configured to source a third current through the second node, the third transistor having a threshold voltage that is different relative to a threshold voltage of the second transistor; and a resistive component coupled to conduct a combination of the second and third currents, wherein the combination of the second and third currents and the first currents are substantially similar.