Analog Devices, Inc.
FIRMWARE-BASED INTERLEAVED-ADC GAIN CALIBRATION AND HARDWARE-THRESHOLDING ENHANCEMENTS

Abstract:

The present disclosure enables firmware-based interleaved-ADC gain calibration and provides hardware-thresholding enhancements. An on-chip memory may store subADC samples and a microprocessor accesses these stored samples for use with the calibration algorithm. Power estimates may be performed using square of each subADC sample to estimate gain error. Thresholding may be applied to the subADC samples, such as Maximum Amplitude Thresholding, Minimum Power Thresholding, and/or using Histogram Output Memory, to determine that samples are valid and may be used for calibration or that subADC data are to be discarded and a new subADC data capture is to be started.