Abstract: An integrated circuit device comprises a first clock signal source, arranged to provide at least one first clock signal; a second clock signal source, arranged to provide at least one second clock signal different from the at least one first clock signal; and a plurality of sequential logic cells, at least one of the plurality connected to receive, in a first mode, the at least one first clock signal or at least one clock signal derived from the at least one first clock signal, and to receive, in a second mode, the at least one second clock signal or at least one clock signal derived from the at least one second clock signal; wherein in the second mode the at least one second clock signal is adapted to the at least one of the plurality of sequential logic cells to generate in at least a portion of the integrated circuit device a current consumption when the at least one first clock signal is not a toggling signal.

Abstract: A system and method in a communication device (10) uses timing tracking to correct timing drifting due to the difference in frequency of a transmitter clock and a receiver clock. With the timing tracking, correlation values of three consecutive samples are calculated using the receive signal and the recovered symbols and then summed. A timing signal, (nk, frack) is updated based upon a metric calculated from a previous correlation value, R?1, present correlation value (R0) and a next con-elation value (R+1). Adjustment of timing signal is based on the relative location with respect to the current timing of a peak of a second order polynomial curve formed by the first correlation value R?1, the second correlation value R0 and the third correlation value R+1.