If the inputs to the diagram shown in figure "2" of the illustration were A=0 and B=0, what logic levels would be indicated at points "C", "D", "E", and "F" respectively? Illustration EL-0089
• Identify each logic gate in figure 2 (AND, OR, NOT) and note which ones have inversion bubbles, making them NAND or NOR gates. • Recall the truth tables for AND, OR, NOT, NAND, and NOR when both inputs are 0. • Trace the signal step‑by‑step: from A and B into C and D, then from D into E, and finally from C and E into F.
• With A=0 and B=0, what is the output of the top gate before and after the inversion bubble at point C? • For the lower path, what is the OR result of A and B, how does the bubble at D change it, and then how does the inverter change it again to produce E? • Once you have values for C and E, what does the final gate do with those two inputs to obtain F?
• Be sure you’ve correctly labeled which gates are NAND and which are NOR (look for the small inversion bubbles). • Verify your intermediate values for C, D, and E against the basic truth tables before deciding on F. • Confirm that the final gate combining C and E has no inversion bubble at its output, so you apply the correct operation there.
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