A selected bandgap reference (11) of a voltage generator (10) is operated
at a duty cycle that is less than one hundred percent. The seclectable
bandgap reference (11) has at a high current consumption when enabled and
a low current consumption when disabled. The output voltage of the
selectable bandgap reference (11) is stored on a storage element (13)
when the selectable bandgap reference (11) is enabled. A high impedance
amplifier (16) receives the stored voltage and generates the reference
voltage.