REFERENCE LADDER AUTO-CALIBRATION CIRCUIT FOR AN ANALOG TO DIGITAL CONVERTER

摘要

An auto-calibrated reference resistor ladder network (140) is disclosed which is suitable for use in a precision ADC (110). Resistors in the ladder are connected to an auto-calibration circuit which continually measures the potential developed across each of the connected resistors and adjusts the resistance of the resistor to match the measured potential to a reference potential. The reference potential is the potential developed across a defined one of the resistors.