Programmable Temperature Coefficient Analog Secondary Curvature Compensated Voltage Reference and Trim Technology for Voltage Reference Circuits

摘要

Exemplary voltage reference circuits include: a first circuit 308 configured to generate a temperature proportional current and a corresponding first control voltage and a temperature complementary current and configured to generate a corresponding second control voltage. A reference circuit 202 including a second circuit 316; A first current source (514 ₁₎ coupled to a load circuit (512) - a first current source to said first and said temperature in response to a second control voltage proportional to the current and the total current of the temperature complementary current And the first load circuit generates a zero temperature coefficient (Tempco) voltage from the total current-; And a second current source 715 ₁ coupled to the second load circuits 718 and 720-the second current source generates the sum of the temperature proportional current and the temperature complementary current in response to the first and second control voltages. And the second load circuit generates a negative Tempco voltage from the sum current and temperature complementary current -.