Circuit generating a stable reference voltage with respect to temperature, particularly for CMOS processes

A generator circuit of a reference voltage which is stable with respect to temperature, the circuit comprising:

• a first bipolar transistor connected between a first and a second voltage references and connected to an output terminal of the generator circuit;
• a first current generator connected to a control terminal of the bipolar transistor and providing a reference current;
• a resistive element connected between the control terminal of the bipolar transistor and an additional voltage reference having reverse dependence on temperature with respect to the reference current;
• and
• a second resistive element, feedback connected between the output terminal of the generator circuit and the control terminal of the bipolar transistor, the output terminal of the generator circuit thus providing a stable reference voltage with respect to temperature.

Method for generating a reference voltage which is stable with respect to temperature, the method comprising:

• providing a bipolar transistor connected between a first and a second voltage references;
• injecting a reference current into a resistive element connected between a control terminal of the bipolar transistor and an additional voltage reference having reverse dependence on temperature with respect to the reference current;
• providing a second resistive element, feedback connected between a first conduction terminal and the control terminal of the bipolar transistor;
• and
• generating a reference voltage stable with respect to temperature and having any value by adding a base-emitter voltage of the bipolar transistor and a voltage across said resistive element.