This paper describes the application of a digital delay locked loop that compensates for variable delays on the clock chip, printed circuit board clock traces, and the clock systems on multiple ASICs. For a computer system consisting of nine PC boards (“modules”) plugged into a back plane with two clock chips per board and six ASICs per clock chip, a locking range of 25-150 MHz was achieved with a maximum skew in the system of less than 1 ns
Published in:
Solid-State Circuits, IEEE Journal of
(Volume:30
,
Issue:
11
)
Date of Publication: Nov 1995