Patent ID: 8653885

Claim:
A device for generating a reference current proportional to absolute temperature, comprising: a processing circuit connected to the terminals of a core and designed to equalize the voltages across respective terminals of the core, the core being configured to then be traversed by an internal current proportional to absolute temperature; and an output module configured to deliver to an output terminal the reference current on the basis of the internal current; and wherein the processing circuit comprises a self-biased amplifier possessing at least one first stage arranged according to a folded setup and having first PMOS transistors arranged in a setup of the common-gate type, and a feedback stage having an input connected to an output of the amplifier and having an output connected to an input of the first stage and to at least one terminal of the core, wherein the first stage comprises at least one differential pair of branches connected between the two terminals of the core and a reference voltage; the feedback stage is designed to deliver as input to the first stage an intermediate current proportional to absolute temperature; and a bias loop is furthermore connected between the input of the feedback stage and the first stage, and is configured to cause the flow of a bias current in each differential pair of branches, the intermediate current being the sum of the internal current and of each bias current flowing in each differential pair of branches.