To display time in railway stations which digital circuit is used?(a) seven segment decoder(b) eight segment encoder(c) 8:3 multiplexer(d) 9 bit segment driverThe question was posed to me in homework.The origin of the question is Boolean Algebra topic in portion Boolean Algebra and Modeling Computations of Discrete Mathematics

To display time in railway stations which digital circuit is used?(a)

1.	To display time in railway stations which digital circuit is used?(a) seven segment decoder(b) eight segment encoder(c) 8:3 multiplexer(d) 9 bit segment driverThe question was posed to me in homework.The origin of the question is Boolean Algebra topic in portion Boolean Algebra and Modeling Computations of Discrete Mathematics
Answer» RIGHT answer is (a) seven segment decoder For explanation I would say: A seven segment decoder is a digital circuit which is used to construct a common type of digital display device i.e., a set of LED (or LCD) segments that display numbers from 0 through 9 at the command of a four-bit code. Moreover, the behavior of the display driver IC is REPRESENTED by a truth table with seven outputs.

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