Question

EE40001 1. Stick diagrams are frequently employed to assist in the layouts. The colour coding scheme that is normally used in such stick diagrams is given in Table Q1. A static CMOS logic gate is to be designed to implement the logic function Flabsd such that of CMOS VLSI (a) Sketch the schematic CMOS circuit that will implement the logic function defined by F using the smallest number of transistors possible (b) From the schematic circuit in part (a), sketch a corresponding stick diagram using the "Mono code" layer representation given in Table Q1. Your answer should clearly label the polysilicon gates with the appropriate input signals (a, b, c and d), along with the power supply (VDD), ground (GND) and output (F) rails. Material Laver Polysilicon Active (nt or p) Metal 1 n-Well boundary Poly /Active contacts Mono code Colour code TZZ Table Q1 (c) Examine the stick diagram layouts given in Fig Q1A and Fig QlB. For each layout, sketch the corresponding schematic CMOS circuit. Hence (or otherwise) determine if the stick diagram represents a functional logic gate and if so determine the logic function that it provides. [10] [QUESTION CONTINUES ON NEXT PAGE] of 8 EE4000 GIND Fig Q1A GIND Fig Q1B

Answer 1

VOD behween ho

VDD a. - ab cd

VDD al Сл cl QfNp