PROGRAMMABLE TEMPERATURE COEFFICIENT ANALOG SECOND-ORDER CURVATURE COMPENSATED VOLTAGE REFERENCE AND TRIM TECHNIQUES FOR VOLTAGE REFERENCE CIRCUITS

An example voltage reference circuit includes: a reference circuit (202) comprising a first circuit (308) configured to generate a proportional-to-temperature current and corresponding first control voltage and a second circuit (316) configured to generate a complementary-to-temperature current and corresponding second control voltage; a first current source (5141) coupled to a first load circuit (512), the first current source generating a sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the first load circuit generating a zero temperature coefficient (Tempco) voltage from the sum current; and a second current source (7151) coupled to a second load circuit (718, 720), the second current source generating the sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the second load circuit generating a negative Tempco voltage from the sum current and the complementary-to-temperature current.