Patent ID: 7039384

Claim:
A low power supply bandgap current reference comprises: first P-N junction device; second P-N junction device, wherein the second P-N junction device is a larger device than the first P-N junction device; first resistor coupled in parallel with the first P-N junction device; second resistor coupled in series with the second P-N junction device, third resistor coupled in parallel with a series combination of the second resistor and the second P-N junction device; first current source coupled to the first P-N junction device; second current source coupled to the series combination of the second resistor and the second P-N junction device, wherein the first and second current sources provide substantially similar currents; operational amplifier operably coupled to control the first and second current sources based on voltages across the first and third resistors; and current mirror operably coupled to the first or second current source to provide a reference current.