How can i generate 4 clocks with 90 degree phase shift and very low jitter?
You'll want to select a device which is capable of supporting a VCO rate which is 4 times your desired output frequency, and has 4 or more outputs (e.g. AD9516). The key function within the chip which enables you to get 90 degree phase offset is the coarse phase selection block in the output divider.
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