Semiconductor Electronics: Materials, Devices and Simple Circuits: NEET 2021

Hard· Digital Electronics and Logic Gates (Combination of Gates)· +4 / −1

For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal

y

? Figure: the input waveforms (levels 0 V or 5 V) are shown against the time instants

t_1

t_6

. A is high during

t_1

t_2

t_3

t_4

and

t_5

t_6

and low otherwise. B is high only during

t_2

t_4

. C is low only during

t_2

t_4

and high otherwise. In the circuit, A and B feed an AND gate; B and C feed a NAND gate; the outputs of the AND gate and the NAND gate feed an OR gate whose output is

y

, so

y = A\cdot B + \overline{B\cdot C}

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Semiconductor Electronics: Materials, Devices and Simple Circuits: NEET 2021

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