Patent ID: 7359473
Filing Date: 2008-04-15
Classification: H04L

Abstract:
1. A communication device comprising a data receiving unit for receiving a transmission data comprised of a bit sequence transmitted in synchronism with a transmission clock of a device at a communication partner side and also comprising a reception clock generating unit for generating a reception clock synchronous with the transmission data and supplying the reception clock to the data receiving unit, wherein the reception clock generating unit comprises: a phase lag detecting unit for detecting a phase lag between the transmission data and the reception clock in connection with signal level variation points of the transmission data; a phase correcting unit for correcting the phase of the reception clock when the phase lag is detected by the phase lag detecting unit; a frequency lag detecting unit for detecting existence of a frequency lag between the transmission clock of the device at the communication partner side and the reception clock on the basis of sequential detection of the phase lag by the phase lag detecting unit; and a frequency correcting unit for correcting the frequency of the reception clock when the frequency lag is detected by the frequency lag detecting unit.