Patent ID: 8912818
Filing Date: 2014-12-16
Classification: G11C

Abstract:
1. A calibration circuit comprising: an amplifier having a first input, a second input, and an output, wherein said first input receives a reference signal and said second input is configured to connect to an external reference component; a current steering digital-to-analog converter (DAC) having a first input, a first analog output, and a second analog output, wherein said first input is connected to the output of said amplifier and said first analog output is connected to the second input of said amplifier; a comparator having a first input receiving said reference signal, a second input connected to said second analog output of said current steering DAC, and an output at which an output of said calibration circuit is presented; a slew calibration network connected to said second input of said comparator and configured to adjust a slew rate of said calibration circuit; and an on-die termination (ODT) network connected to said second input of said comparator.