Patent ID: 6249175
Filing Date: 2001-06-19
Classification: G05F

Abstract:
A self-biasing circuit comprising:a current mirror circuit having a first transistor, a second transistor, and a third transistor for producing an output current, each of said first, second, and third transistors having respective emitters, bases, and collectors;a fourth transistor having an emitter, a base, and a collector, the collector being connected to the collector of said first transistor;a fifth transistor having an emitter, a base, and a collector, the collector being connected to the bases of said fifth and fourth transistors and to the collector of said second transistor;a first resistor connected between the emitters of said fourth and fifth transistors, for flow of a reference current having a positive temperature characteristic; anda second resistor connected between the bases of said fourth and fifth transistors and the emitter of said fourth transistor for flow of a reference current having a negative temperature characteristic.