	US 7,599,460 B2
	Transmitting apparatus
Hiroyuki Matsuo, Kadoma (Japan); and Eiji Maeda, Neyagawa (Japan)
Assigned to Fujitsu Limited, Kawasaki (Japan)
Filed on Apr. 07, 2006, as Appl. No. 11/400,337.
Claims priority of application No. 2005-289129 (JP), filed on Sep. 03, 2005.
Prior Publication US 2007/0079163 A1, Apr. 05, 2007
Int. Cl. H04L 7/00 (2006.01)

U.S. Cl. 375—373 [375/376]

5 Claims

1. A transmitting apparatus, comprising:

a first device including:

a first clock source for generating a first clock, and

a second clock source for generating a second clock; and

a second device including:

a first timing clock generator for pulling the first clock into the second clock, the first timing clock generator including;

a first variable delay element for variably delaying the first clock;

a second variable delay element for variably delaying the second clock;

a first phase detection circuit for comparing the first clock and the second clock; and

a first phase controller controlling a phase control amount of the first variable delay element and the second variable delay element by the use of a result of the first phase detection circuit; and

a second timing clock generator for pulling the second clock into the first clock, the second timing clock generator including:

a third variable delay element for variably delaying the first clock;

a fourth variable delay element for variably delaying the second clock;

a second phase detection circuit for comparing the first clock and the second clock; and

a second phase controller controlling a phase control amount of the third variable delay element and the fourth variable delay element by the use of a result of the second phase detection circuit.