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sinara-hw / mirny

4-channel Microwave synthesiser
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More flexible clock routing #23

Closed hartytp closed 3 years ago

hartytp commented 4 years ago

https://github.com/sinara-hw/mirny/issues/10#issuecomment-558618102

gkasprow commented 3 years ago

@hartytp @jordens would such wiring work for you? obraz

hartytp commented 3 years ago

That arrangement allows one to select between the SMA and the VCXO/MMCX on a per-channel basis. For our use-cases, it would be more convenient to select between the MMCX and the SMA/VCXO on a per-channel basis, but the above is acceptable. @jordens preferences here?

@gkasprow based on our previous experience, I guess we expect quite a bit of cross-talk from the DNPd jumpers, do we?

gkasprow commented 3 years ago

we can use T-type jumpers, when unused, the central part is grounded.

jordens commented 3 years ago

Either is fine by me.

jordens commented 3 years ago

Default population being all channels clocked from IC13.

gkasprow commented 3 years ago

I added such a scheme. To avoid dangling nets, the segment is terminated on both sides. To improve isolation, unused net segments can be grounded. That should solve the issue with crosstalk. obraz

gkasprow commented 3 years ago

I also changed the assignment - now we select between MMCX and the SMA/VCXO.

gkasprow commented 3 years ago

The layout/routing of the clocking section obraz