Patent ID: 7456679

Claim:
A reference circuit comprising: a first reference circuit having a first node for providing a reference signal and a ΔV BE loop; and a modification circuit using a first voltage to change a first current in the ΔV BE loop of the first reference circuit, where: the change in the first current in the ΔV BE loop of the first reference circuit changes the reference signal to a modified reference signal; V mod ≅ V Bandgap ( 1 + R 2 R 3 ) where V mod modified reference signal, V Bandgap is the reference signal of the first reference circuit without the modification circuit present, R 2 is a resistance value of a resistor in the first reference circuit, and R 3 is a resistance value of a resistor in the modification circuit; and the modification circuit is electrically coupled in a path between the first node and the ΔV BE loop of the first reference circuit.