Band-gap reference circuit for providing an accurate reference voltage compensated for process state, process variations and temperature

An electronic device, comprising:

• a band-gap reference circuit;
• electronic circuitry, requiring reference to said band-gap reference circuit and electronically coupled to said band-gap reference circuit;
• and,
• programmable circuitry, electronically coupled to said band-gap reference circuit;
• wherein said programmable circuitry is enabled to control the trimming current of said band-gap reference circuit.

In an integrated circuit device, a method for providing a reference voltage, comprising the steps of:

• flowing current through a chain of diodes such that the band-gap voltage of said diodes adds up to said reference voltage;
• providing selectable trimming shunts;
• and
• adjusting said flow of current through said chain of diodes by activating said trimming shunts such that desired amounts of current are shunted past said chain of diodes.