A programmable, electrically alterable (EA) resistor, an integrated circuit (IC) chip including the EA resistor and integrated analog circuits using on-chip EA resistors. Phase change storage media form resistors (EA resistors) on an IC that may be formed in an array of parallel EA resistors to set variable circuit bias conditions for circuits on the IC and in particular, bias on-chip analog circuits. The bias resistance is changed by changing EA resistor phase. Parallel connection of the parallel EA resistors may be dynamically alterable, switching one or more parallel resistors in and out digitally.