Texas Instruments Corporation

Sudheer Gangula

Dimitar Trifonov

Jerry Doorenbos

Examples of bandgap circuits and elements thereof enable generation of an accurate and stable bandgap reference voltage that is not affected by low current gain. An example circuit includes first and second input transistors, each having an emitter to receive a tail current; first and second core transistors, a collector of each coupled to ground; a first lower leg coupled between a first upper leg and the emitter of the first core transistor at a first current input coupled to the base of the first input transistor; a second lower leg coupled between a second upper leg and the emitter of the second core transistor at a second current input coupled to the base of the second input transistor; and a base resistor coupled between the base and collector of the first core transistor. The input transistor pair has a current density ratio that is the same as that of the core transistor pair.

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TUCSON, AZ, United States of America

Sudheer Gangula