Method and apparatus for synchronizing multiple direct digital synthesizers (DDSs) across multiple printed circuit assemblies (PCAs)
First Claim
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1. A radio frequency generation system comprising:
- a synchronization board that receives an external clock signal from a clock source and generates multiple copies of the external clock signal;
a plurality of RF signal generation boards each of which receives a copy of the external clock signal from the synchronization board, wherein each signal generation board comprises;
a plurality of direct digital synthesizers each having a reference clock input and a synchronization input;
replicator circuitry that distributes substantially identical copies of the external clock signal to the reference clock inputs of each of said plurality of direct digital synthesizers; and
translator circuitry that generates a translated version of the external clock signal and distributes the translated version of the external clock signal to the synchronization inputs of each of said plurality of direct digital synthesizers.
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Abstract
A radio frequency generating system comprises a synchronization board that receives an external clock signal from a clock source and generates multiple copies of the external clock signal. Each of a plurality of signal generation board receives a copy of the external clock signal from the synchronization board. Each signal generation board comprises a plurality of direct digital synthesizers that are synchronized using the external clock signal.
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Citations
4 Claims
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1. A radio frequency generation system comprising:
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a synchronization board that receives an external clock signal from a clock source and generates multiple copies of the external clock signal; a plurality of RF signal generation boards each of which receives a copy of the external clock signal from the synchronization board, wherein each signal generation board comprises; a plurality of direct digital synthesizers each having a reference clock input and a synchronization input; replicator circuitry that distributes substantially identical copies of the external clock signal to the reference clock inputs of each of said plurality of direct digital synthesizers; and translator circuitry that generates a translated version of the external clock signal and distributes the translated version of the external clock signal to the synchronization inputs of each of said plurality of direct digital synthesizers. - View Dependent Claims (2, 3)
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4. A method for synchronizing multiple direct digital synthesizers across a plurality of signal generation boards comprising the steps of:
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receiving an external clock signal from a clock source; generating multiple copies of the external clock signal and distributing the copies to a plurality of signal generation boards; receiving a copy of the external clock signal at each of said plurality of signal generation boards; at each of said plurality of signal generation boards; distributing the external clock signal to respective external clock inputs of a plurality of direct digital synthesizers therein; and generating a translated version of the external clock signal and distributing the translated version of the external clock signal to a respective synchronization input of each of the plurality of direct digital synthesizers.
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Specification