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发表于 2010-8-31 11:43:37
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filters (Mosfet-C, Gm-C, Gm-OTA-C) •Layout design for matching –Capacitor matching rules •design to limit the capacitor ratio value •choice of the unit capacitor area with identical layout structure •interdigitate layout, common centroid structure •dummy capacitors for uniform environment –Resistor matching rules •never use small width W resistor •choice of the unit resistor value with L ~ 50---100 um •identical layout structure &contacts and the same direction •dummy resistors for uniform environment •Layout design for matching (Contd) –MOSFET matching rules •never use min dimensions (W,L) •use |
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