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# lecture10 - CMPT 150 Combinational Circuits Page 1 CMPT 150...

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CMPT 150 Combinational Circuits Page 1 Example: BCD to Seven Segment Converter Specification: Digital readouts found in many consumer electronic products such as alarm clocks often use LEDs. Each digit of the readout is formed from seven LED segments, where each segment can be illuminated by a digital signal. A BCD to seven segment converter is a combinational circuit that accepts a decimal digit in BCD and generates the appropriate outputs for the segments of the display for that decimal digit. CMPT 150 Combinational Circuits Page 2 BCD to Seven Segment Converter: Formulation The truth table: CMPT 150 Combinational Circuits Page 3 Design of a 4-bit Equality Comparator Specification: The inputs to this circuit is two 4 bit values A and B . A consists of 4 bits A(3), A(2), A(1), and A(0), where A(3) is the most significant bit. Similarly B consists of 4 bits. The output of the circuit is a single bit variable E . Output E is equal to 1 if A and B are equal and equal to 0 if A and B are unequal.

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