A combinational circuit is used to control a 7-segment display of decimal
digits. The circuit has 4 inputs (x3, x2, x1, x0), which provide the 4-bit code
used in BCD representation (0000 = 0, 1001 = 9). The seven outputs (y6, y5, y4,
y3, y2, y1, y0) define which segments will be activated to display a given
decimal digit. Note some combinations of inputs and outputs are not needed.
Write the truth table for this circuit
Express the truth table in SOP form
Express the truth table in POS form
Provide a simplified expression
Implement your circuit in Diglog
y0
_
y1 |_| y2 y3 is center bar
y4 |_| y5
y6
Segments that are illuminated for each set of inputs
_ _ _ _ _ _ _
| | | _| _| |_| |_ |_ | |_| |_|
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