Base current cancellation for bipolar junction transistor current summing bias voltage generator

摘要

A circuit for creating a current complementary to absolute temperature comprises a first transistor and a second transistor. A resistor for generating a current complementary to absolute temperature has a first node coupled to the emitter of the first transistor and a second node coupled to the base of the first transistor. A first current mirror is coupled between the second node of the resistor and the emitter of the second transistor, the second transistor being used for replicating bias conditions of the first transistor. A second current mirror is coupled between the base of the first transistor and the base of the second transistor, and the second current mirror is used for canceling a base current of the first transistor.