NovelPanda
Junior Member level 3
Long interconnect between digital and analog blcoks
Dear All:
Due to chip planning reason, I have separated the digital blocks and analog ones far away from each other. However, the digital control line must travel a quite long distance (~1mm) before they reach the analog parts. Such interconnects are mainly bit control signal (like VCO band control bit) that would be quiescent after the chip goes into steady state, and the transition speed is pretty low (tens of ns per transit), so their parasitics may not be a concern. I am wondering if this is feasible on-chip because I fear that the lines are broken during manufacturing or easy to break when chip power up. In addition, the line are multilevel metals with 4um width, and inverter buffers are inserted every 300um. Does anyone can help and provide experience?
Thanks in advance!
Dear All:
Due to chip planning reason, I have separated the digital blocks and analog ones far away from each other. However, the digital control line must travel a quite long distance (~1mm) before they reach the analog parts. Such interconnects are mainly bit control signal (like VCO band control bit) that would be quiescent after the chip goes into steady state, and the transition speed is pretty low (tens of ns per transit), so their parasitics may not be a concern. I am wondering if this is feasible on-chip because I fear that the lines are broken during manufacturing or easy to break when chip power up. In addition, the line are multilevel metals with 4um width, and inverter buffers are inserted every 300um. Does anyone can help and provide experience?
Thanks in advance!