Patent ID: 11881825
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method comprising:
detecting trigging of trim mode;
applying, in a trim mode of an integrated circuit (IC) comprising an operational amplifier (op-amp), a given common mode voltage to inverting and non-inverting inputs of the op-amp,
conducting, in a successive approximation register (SAR) logic of a trimming module connected to the op-amp, a first number of iterations determining coarse bits of a memory value, wherein the first number of iterations are conducted at a first clock cycle duration,
conducting, in the SAR logic, a second number of iterations determining remaining fine bits of the memory value, wherein the second number of iterations are conducted at a second clock cycle duration, the second clock cycle duration being longer than the first clock cycle duration,
adjusting, at the trimming module, after each iteration, a trim control signal that changes an operational parameter of the op-amp to trim the op-amp based on the memory value,
measuring, at the trimming module, after each iteration, a parameter of the op-amp based on the adjusting, and
detecting, at the trimming module, whether the measured parameter is within a predetermined interval.