How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?

More Questions from Combinational Logic Circuits

• Which of the following expressions is in the product-of-sums form?
• A 74HC147 priority encoder has ten active-LOW inputs and four active-LOW outputs. What would be the state of the four outputs if inputs 4 and 5 are LOW and all other inputs are HIGH?
• A decoder can be used as a demultiplexer by ________.
• Which of the following combinations of logic gates can decode binary 1101?
• An output gate is connected to four input gates; the circuit does not function. Preliminary tests with the DMM indicate that the power is applied; scope tests show that the primary input gate has a pulsing signal, while the interconnecting node has no signal. The four load gates are all on different ICs. Which instrument will best help isolate the problem?
• A full-adder has a Cin = 0. What are the sum (∑) and the carry (Cout) when A = 1 and B = 1?
• Two 4-bit binary numbers (1011 and 1111) are applied to a 4-bit parallel adder. The carry input is 1. What are the values for the sum and carry output?
• The device shown here is most likely a ________.
• Which of the following combinations cannot be combined into K-map groups?
• Which of the figures in figure (a to d) is equivalent to figure (e)?

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