Evolvable Analog LSI
We propose a concept of evolvable analog LSIs and apply it to (1) Intermediate Frequency (IF) filters and (2) Image-Rejection Mixers (IRM). The developed LSI for IF filters have attained (1) a 63% reduction in filler area, (2) a 26% reduction in power dissipation, compared to existing commercial products using both the same process technology and filter topology, and (3) a yield rate of 97%. The developed chip is calibrated within a few seconds by the genetic algorithm (GA). The developed microwave circuit for IRM is also calibrated by GA to outperform a circuit adjusted by an experienced engineer. Our calibration method, which can be applied to a wide variety of analog circuits, leads to cost reductions and the efficient implementation of analog LSIs.
Key wordsanalog LSI yield power dissipation die area process variation IF filter Gm-C filter image-rejection mixer microwave circuit
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