In order to fill the PEP and SPEAR storage rings with beams from the SLC linac and damping rings, precise con trol of the linac subharmonic buncher and the damping ring RF is required. Recently several companies have developed resettable GiAs master/slave fl-type flip-Sops which are ca pable of operating at frequencies of 3 GHz and higher. Using these digital devices as frequency dividers, one can phase shift the SLAC CW-RF systems to optimize the timing for filling the storage rings. We have

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... aluated the performance of inte grated circuits from two vendors for our particular application. Using microstrip circuit techniques, we have built and oper ated in the accelerator several chassis to synchronize a reset signal from trie storage rings to the SLAC 2.656 GHz RF and to phase shift divide-by-four and divide-by-sixteen frequency dividers to the nearest 350 psec bucket required for filling. DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Nettlter Che United 5tales Government nor aay agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsi bility for the accuracy, completeness, or usefulness of any information, apparatus, produce, or process disclosed, or represents that its use would not infringe privately owned rights. Refer ence herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom mendation, or favoring by the United States Government or any agency thereof. The views and opinions or authors expressed herein do not necessarily state or reflect those of the United Slates Government or any agency thereof.