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Hi,
We have placed an oscillator close to the ASIC, but we are considering using multiple ASICs in the future. I am considering whether it will work fine with just one oscillator for multiple ASICs, or whether it would be better to use a clock buffer. When do you need a clock buffer? I would like to know what concerns you have and how they can be resolved by adopting a clock buffer.
Thanks,
Conor
Hello Conor,
I am considering whether it will work fine with just one oscillator for multiple ASICs, or whether it would be better to use a clock buffer.
For multiple ASICs, you for sure want one oscillator given the reference to a buffer and that buffer fanning out that frequency to multiple ASICs. If you only use one oscillator and route that signal to multiple ASICs, the swing/amplitude of your clock will change and therefore, may violate the swing requirements and add more noise for the clock being fed into the ASICs.
When do you need a clock buffer?
In other words, this is a perfect example of when you would need a buffer. When you are trying to create several multiples of the same frequency. Let me know if you have any other questions.
Good luck!
Andrea