Digital Electronics: Principles, Devices and Applications

354 Digital Electronics3. Determine the number of programmable interconnections in the following programmable logicdevices.(a) 1K × 4 PROM;(b) PLA device with four input variables, 32 AND gates and four OR gates;(c) PAL device with eight input variables, 16 AND gates and four OR gates.(a) 4096; (b) 384; (c) 2564. A and B are two binary variables. The objective is to design a magnitude comparator to produceA = B, ABoutputs. Design a suitable PLD with a PAL-like architecture usinganti-fuse based interconnects.Fig. 9.44ABA=B ABFigure 9.44 Answer to problem 4.5. Figure 9.45 shows a programmed PAL device using fuse-based interconnects. Examine the logicdiagram and determine the logic block implemented by the PLD. A cross (× represents anunprogrammed interconnection and a dot (•) represents a hard-wired interconnection.Full adder