Patent ID: 8149033
Filing Date: 2012-04-03
Classification: H03L

Abstract:
1. A phase control device comprising a DLL circuit that adds a delay amount to a phase of a reference signal by using delay elements, wherein the DLL circuit includes a delay line that adds, when receiving the reference signal, a delay amount to the phase of the reference signal by using each of the delay elements and outputs a delay signal for each of the delay elements; a phase detector that compares a phase of a delay signal delayed by all the delay elements of the delay line and the phase of the reference signal to obtain a phase difference by using an adjusted delay signal being outputted by a phase adjustment circuit or an adjusted reference signal being outputted by the phase adjustment circuit or a combination thereof, the phase adjustment circuit, when receiving the reference signal or the delay signal delayed by all the delay elements of the delay line or a combination thereof, adjusting the phase of the received reference signal or the received delay signal or a combination thereof and outputing the adjusted delay signal or adjusted reference signal or a combination thereof; and a delay element control circuit that inputs a control voltage value into each of the delay elements of the delay line, the control voltage value being a value by which the delay signal to be compared by the phase detector is synchronized with the reference signal to be compared by the phase detector and being generated from the phase difference output from the phase detector.