weber8722
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In a recent mixed-signal IC design project (mid-size, no deep-sub-um technology) I used circuit optimization techniques with some success, but the whole analog layout was still done fully manually (just schematic-driven, not more), only routing to the control-unit was done with a routing tool. As usual I observed that analog layout takes more than expect, but my trials with constraints, analog placers, etc. where not so positive. With no constraints the placements where poor, with many constraints, just many of them are not kept. Or partly the placement was good, but it was extremely difficult to repair the non-optimum parts. What are your experiences? Which tools? PDK support? Who should use them, the front-end designer or a layout expert? Learning curve? For what blocks (complexity, ADC, RF,...)?
Bye Stephan
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