Reference voltage training device and method thereof

摘要

Provided are a reference voltage training device and a method thereof. The reference voltage training device includes a comparator configured to compare a toggle signal with a reference voltage and output a comparison signal, a duty cycle detector configured to check a duty ratio of the comparison signal, and a reference voltage level changing unit configured to fix the reference voltage when the duty ratio meets a predetermined condition and to change a level of the reference voltage when the duty ratio does not meet the predetermined condition. The comparator outputs a changed comparison signal using the changed reference voltage.

主权项

1. A reference voltage training device comprising:
a comparator configured to compare a toggle signal with a reference voltage and output a comparison signal; a phase converter configured to shift a phase of the comparison signal and output an inverted phase signal; a duty cycle detector configured to measure a duty ratio of the comparison signal by comparing the comparison signal with the inverted phase signal; and a reference voltage level changing unit configured to fix the reference voltage when the duty ratio meets a predetermined condition and, when the duty ratio does not meet the predetermined condition, to modify a level of the reference voltage and output a changed reference voltage, wherein the comparator outputs a changed comparison signal using the changed reference voltage.