sinara-hw / Urukul

4 channel 1GS/s DDS (AD9910 or AD9912 variant)
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incorrect PCB stackup dielectric constant #54

Closed sbourdeauducq closed 3 years ago

sbourdeauducq commented 3 years ago

The Dielectric3 layer constant is specified to be 4.2, which is not symmetric (the constant of Dielectric1 is 3.66). And the theoretical impedances improve when changing the constant of Dielectric3 to 3.66. Greg confirmed this is an error.

urukul_stackup

gkasprow commented 3 years ago

fixed