Compensation circuit for delta-sigma modulators, corresponding device and method

A device, comprising:

• an analog signal input, which, in operation, receives an analog input signal;
• and
• a delta-sigma modulation circuit having a sampling period and coupled to the analog signal input, wherein the delta-sigma modulation circuit, in operation, generates a delta-sigma modulated signal based on the analog input signal, the delta-sigma modulation circuit including:
• a modulated signal output, which, in operation, outputs the delta-sigma modulated signal;
• a first integrator;
• an analog-to-digital converter coupled to the modulated signal output;
• a feedback-loop coupled between the modulated signal output and an input of the first integrator;
• a second integrator coupled between the first integrator and the analog-to-digital converter;
• and
• loop-delay compensation circuitry having a plurality of switches, wherein the loop delay compensation circuitry, in operation, controls the plurality of switches based on a time interval of a duration of half the sampling period and generates a loop-delay compensation signal.