Patent ID: 11940831
Assignee: INFINEON TECHNOLOGIES AG
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A method comprising:
measuring an output current of a programmable PTAT generator of a reference current generator at a first scale setting of a plurality of programmable scale settings at a first temperature to obtain a first current measurement;
measuring the output current of the programmable PTAT generator at a second scale setting of the plurality of programmable scale settings at the first temperature to obtain a second current measurement;
measuring the output current of the programmable PTAT generator at the first scale setting of the plurality of programmable scale settings at a second temperature to obtain a third current measurement; and
measuring the output current of the programmable PTAT generator at the second scale setting of the plurality of programmable scale settings at the second temperature to obtain a fourth current measurement;
determining a scale setting of the plurality of programmable scale settings that configures the programmable PTAT generator to generate an output current having a predetermined temperature coefficient based on the first current measurement, the second current measurement, the third current measurement and the fourth current measurement;
setting the programmable PTAT generator to the determined scale setting to provide a trimmed temperature dependent current;
determining a constant current offset that provides a predetermined dc offset current at a third temperature when subtracted from the trimmed temperature dependent current;
setting a programmable constant current generator of the reference current generator to provide the determined constant current offset;
generating, by the reference current generator, a reference current based on the trimmed temperature dependent current and the determined constant current offset; and
comparing an output current of a memory cell of a memory circuit with the reference current.