Patent ID: 7382151
Filing Date: 2008-06-03
Classification: H04L

Abstract:
1. A method for reducing the cross-talk induced edge jitter within a plurality of propagating data signals transmitted over data transmission lines and a synchronous propagating clock signal transmitted over a clock transmission line proximate the data transmission lines comprising the steps of: coupling states of each of a plurality of data signals to an input of a data off-chip driver (OCD) with a first circuit in response to a first logic state transition of a first clock signal of frequency F thereby generating one of the propagating data signal as the output of the data OCD coupled to one of the data transmission lines; generating a second clock signal with a frequency F/2 from the first clock signal; generating a shifted second clock signal in a second circuit by shifting the second clock signal a time substantially equal to one-half cycle of the first clock signal; and coupling the shifted second clock signal to the input of a clock OCD thereby generating the propagating clock signal as an output of the clock OCD coupled to the clock transmission line, wherein transition generated noise coupled from the data transmission lines to the clock transmission line occurs between positive going and negative going logic state transitions of the propagating clock signal.