OFFSET CORRECTION CIRCUIT AND OFFSET CORRECTION METHOD

摘要

In one example, an offset correction circuit (10) turns on a first switch (SW1) and a third switch (SW3), and turns off a second switch (SW2) and a fourth switch (SW4) to approximate a pre-correction voltage and the reference voltage for a DA converter (15), and then turns off the first switch (SW1) and the third switch (SW3), and turns on the second switch (SW2) and the fourth switch (SW4) to output a reference voltage.