Circuit for generating a reference voltage having a predetermined temperature drift

Claim 1

A circuit for generating a reference voltage with a predetermined temperature drift, comprising a supply circuit; output terminals; a series circuit connected to said supply circuit and between said output terminals including a network and a circuit for generating an electrical variable having a positive temperature coefficient, wherein said network includes at least one active component; and wherein said circuit for generating an electrical variable having a positive temperature coefficient includes: a first branch having a first transistor connected as a diode with a base and a collector, a first collector resistor connected to the collector of said first transistor, a second branch parallel to said first branch having a second transistor with a base, a collector and an emitter, a second collector resistor connected to the collector of said second transistor and an emitter resistor connected to the emitter of said second transistor, and said bases of said first and second transistors are interconnected, and a regulator with negative feedback for regulating an operating point setting having an input circuit connected to said circuit for generating an electrical variable having a positive temperature coefficient and an output circuit connected to said output terminals.