Patent ID: 8556506
Filing Date: 2013-10-15
Classification: G01K

Abstract:
1. A temperature-current transducer to generate an output current representative of temperature differences between a temperature in an environment and a reference temperature, and comprising: a first voltage divider coupled between a first supply voltage and a reference voltage, and comprising a thermistor in the environment; a second voltage divider coupled in parallel to said first voltage divider; an operational 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 operational 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 configured to mirror an output line of a current flowing through said cascode stage; and a first reference current generator to bias said cascode stage.