Patent ID: 6144242
Filing Date: 2000-11-07
Classification: H04L

Abstract:
A device for transmitting multiple synchronized signals with reduced electromagnetic interference at a peak frequency comprising:a first transmission line for carrying a first digital signal having a minimum time T between transitions;a first controllable delay coupled to the first transmission line and adapted to delay the first digital signal by a first controlled interval of time to produce a first delayed digital signal, said first controlled interval of time being significantly less than T;a second transmission line for carrying a second digital signal, said second transmission line being in close proximity to said first transmission line, and said second digital signal having the same minimum time T between transitions and being synchronized with the first digital signal;a second controllable delay coupled to the second transmission line and adapted to delay the second digital signal by a second controlled interval of time to produce a second delayed digital signal, said second controlled interval of time being significantly less than T and being different from said first controlled interval of time;a third transmission line for carrying a third digital signal, said third transmission line being in close proximity to the first and second transmission lines, and said third digital signal having the same minimum time T between transitions and being synchronized with said first and second digital signals; anda third controllable delay coupled to the third transmission line and adapted to delay the third digital signal by a third controlled interval of time to produce a third delayed digital signal, said third controlled interval of time being significantly less than T and being different from said first and second controlled intervals of time, wherein the first, second, and third controlled intervals of time are generally different from each other such that the transitions of the first, second, and third delayed digital signals are slightly out-of-sync.