2 Static CMOS CircuitsIn Static CMOS circuits with n inputs, 2n transistors are needed.nMOS block is a dual of the pMOS block.What ever is in series in nMOS, appears in parallel in pMOS and vice versa.CMOS gates consume power only during the transition of inputs.
3 Static complementary gate structure Pull-up and pull-down networksVDDpull-upnetworkoutinputsPull-downnetworkVSS7
4 Pull-up/pull-down network design Pull-up and pull-down networks are duals.To design one gate, first design one network, then compute dual to get other network.13
16 Problems Design a CMOS circuit to implement the logic Y = A'B' + B'C + C'AMake a 2 input CMOS XOR gate to implementY = A B.CMOS XOR and XNOR gates are similar. Just one of the input pairs (A and A' are reversed).
18 Stick diagrams A stick diagram is a cartoon of a layout. Does show all components/vias (except possibly tub ties), relative placement.Does not show exact placement, transistor sizes, wire lengths, wire widths, tub boundaries.