Temperature-current transducer

A temperature-current transducer comprising:

• a first voltage divider coupled between a first supply voltage and a reference voltage, and comprising a thermistor;
• a second voltage divider coupled between the first supply voltage and the reference voltage;
• an amplifier having a first input coupled to an intermediate node of said first voltage divider, and a second input coupled to an intermediate node of said second voltage divider;
• a cascode stage configured to be biased in a conduction state and controlled by said amplifier, said cascode stage comprising a first current terminal coupled to the intermediate node of said second voltage divider, and a second current terminal;
• a current mirror coupled to said second current terminal of said cascode stage;
• and
• a first reference current generator to bias said cascode stage.

A method for generating an output current representative of temperature differences between an environment temperature and a reference temperature, the method comprising:

• connecting a first voltage divider between a first supply voltage and a reference voltage, the first voltage divider comprising a thermistor;
• connecting a second voltage divider between the first supply voltage and the reference voltage;
• connecting an operational amplifier having a first input to an intermediate node of the first voltage divider, and having a second input to an intermediate node of the second voltage divider;
• connecting a cascode stage to the operational amplifier, the cascode stage biased in a conduction state and controlled by the operational amplifier, the cascode stage comprising a first current terminal coupled to the intermediate node of the second voltage divider, and a second current terminal;
• connecting a current mirror to the second current terminal of the cascode stage to mirror an output line of the temperature-current transducer current flowing through the cascode stage;
• and
• connecting a first reference current generator to bias the cascode stage.