A good tutorial on sigma delta is https://www.analog.com/en/resources/technical-articles/sigmadelta-adcs-tutorial.html https://www.analog.com/en/resources/techn

A good tutorial on sigma delta is https://www.analog.com/en/resources/technical-articles/sigmadelta-adcs-tutorial.html https://www.analog.com/en/resources/technical-articles/sigma... For a deeper dive, check out any of Richard Schreier's lectures.