Patent ID: 9059717
Filing Date: 2015-06-16
Classification: G04G,H03K,H03L

Abstract:
1. An apparatus for frequency compensation comprising: a first counter configured to set a reference period using a main clock; a second counter configured to sense a change in the frequency of a sub clock using the reference period; and a frequency compensator configured to provide a compensated frequency using the change in the frequency of the sub clock, wherein the first counter is further configured to set a number of reference clock cycles for the main clock and to set the reference period by measuring a time taken to count the number of reference clock cycles, wherein the second counter is further configured to sense the change in the frequency of the sub clock by counting a number of clock cycles of the sub clock corresponding to a time taken to set the reference period, and wherein the first counter is further configured to set and store the reference period, and the second counter is further configured to sense the change in the frequency of the sub clock using the reference period stored by the first counter.