Patent ID: 8836413

Claim:
A low power, resistor-less voltage reference circuit, comprising: a proportional-to-absolute-temperature (PTAT) voltage generator configured to produce a PTAT voltage across a first pseudo resistor, wherein the first pseudo resistor comprises a transistor, wherein the PTAT voltage across the first pseudo resistor produces a current based on a resistance of the first pseudo resistor; a current mirror circuit configured to mirror the current; a second pseudo resistor comprising a transistor, wherein the second pseudo resistor is used to convert the mirrored current to a converted PTAT voltage, wherein the first pseudo resistor and the second pseudo resistor comprise equal transistor types; and a complementary-to-absolute-temperature (CTAT) voltage generator configured to produce a CTAT voltage, wherein the CTAT voltage is summed with the converted PTAT voltage to produce a reference voltage, wherein the reference voltage is temperature independent.