METHOD OF AUTOMATICALLY CORRECTING AD CONVERTER AND AD CONVERTER

摘要

For the automatic calibration of an analog-to-digital converter an analog calibration quantity is measured and the digital signal is compared with a digital calibration signal associated with the calibration quantity. A digital difference signal is applied to a register for influencing its counting capacity, while the register contents of pulses counted during the measurement also represents one of the parameters involved in the analog-to-digital conversion. Because of the fully digital character of the calibration, this calibration can be performed very rapidly and accurately.