Patent ID: 8120415

Claim:
Circuit for generating a temperature-compensated voltage reference of the type comprising at least one generator circuit of a band-gap voltage, inserted between a first and a second voltage reference and including an operational amplifier, having in turn a first and a second input terminal connected to an input stage connected to said first and second input terminal and comprising at least one pair of a first and a second bipolar transistor for the generation of a first voltage component proportional to the temperature, a control block connected to said generator circuit of a band-gap voltage in correspondence with at least one control node coupled to a base of the first bipolar transistor, which is supplied with a value of biasing voltage comprising at least one voltage component which increases with the temperature for compensating the variations of the base-emitter voltage of said first and second bipolar transistor and ensuring the turn-on of a pair of input transistors of said operational amplifier, said circuit including a reference block in communication with another control node and coupled to the control block and configured to communicate a reference voltage constant with the temperature, the circuit further having an output terminal suitable for supplying a temperature-compensated voltage value obtained by the sum of said first voltage component proportional to the temperature and of a second component inversely proportional to the temperature.