A voltage generation circuit generates a reference voltage using a bandgap
reference. A countering circuit is included to adaptively counter for any
deviations caused in a bandgap reference voltage such that the reference
voltage is independent of fabrication process variations and changes in
ambient temperature. In an embodiment, current, proportionate to
deviation in absolute value of Vbe from a nominal value, is injected into
an emitter-base junction to cause Vbe to equal the nominal value.