The logic gates shown in the digital circuit below use strong pull-down nMOS transistors for LOW logic level at the outputs

Q. The logic gates shown in the digital circuit below use strong pull-down nMOS transistors for LOW logic level at the outputs. When the pull-downs are off, high-value resistors set the output logic levels to HIGH (i.e. the pull-ups are weak). Note that some nodes are intentionally shorted to implement โ€œwired logicโ€. Such shorted nodes will be HIGH only if the outputs of all the gates whose outputs are shorted are HIGH.

The number of distinct values of ๐‘‹3๐‘‹2๐‘‹1๐‘‹0 (out of the 16 possible values) that giv ๐‘Œ = 1 is

Ans: 8

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