Patent ID: 6011427
Filing Date: 2000-01-04
Classification: G05F

Abstract:
A circuit for providing base current in a current mirror, comprising:a first transistor having an emitter coupled to a first terminal, a base, and a collector coupled to a first source of current, the emitter and base of the first transistor being coupled to the emitter and the base of at least one additional transistor to which the current in the first transistor is mirrored and from which a current output is provided;a first feedback circuit coupled to the base and the collector of the first transistor and to a second source of current, the first feedback circuit controlling the base current of the first and additional transistors, responsive to a voltage on the collector of the first transistor; anda second feedback circuit coupled to the first feedback circuit and to the second source of current, the second feedback circuit controlling the second source of current responsive to the base current of the first and additional transistors.