Digital differential analyzer data synchronizer
AssigneeMicroUnity Systems Engineering, Inc.
InventorsCraig C. Hansen, Timothy B. Robinson
Life of this patent
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Abstract
A digital differential analyzer data synchronizer receives data at a first clock rate and synchronizes the data to a second clock rate. The two clock rates are related by a ratio of two integers, but have a variable phase relationship. The synchronizer places incoming data into a series of registers at the first clock rate. A digital differential analyzer functions to generate a synchronization signal having a frequency proportional to a ratio of the first clock rate and the second clock rate. A multiplexer is utilized for sequentially reading the plurality of registers at a rate corresponding to the frequency of the synchronization signal.
Claims8
A method of synchronizing a data stream between two distinct clock domains, said method comprising the steps of:
- receiving said data stream at a rate of a first clock;
- sequentially loading said data stream into a plurality of registers at said first clock rate;
- utilizing a digital differential analyzer to generate a synchronization signal having a frequency proportional to a ratio of said first clock rate and a rate of a second clock;
- and
- sequentially reading said plurality of registers at a rate corresponding to said frequency of said synchronization signal.
An apparatus for synchronizing a data stream between two distinct clock domains, said apparatus comprising:
- an input means for receiving said data stream at a rate of a first clock;
- a means for sequentially loading said data stream into a plurality of registers at said first clock rate;
- a digital differential analyzer operative for generating a synchronization signal having a frequency proportional to a ratio of said first clock rate and a rate of a second clock;
- and
- a means for sequentially reading said plurality of registers at a rate corresponding to said frequency of said synchronization signal.
Dependencies are inferred from the claim text.