Analysis and Synthesis of Boolean Relations by cascading two comparator to realize an eight bit magnitude comparator

INSTRUCTION

  1. Apply high to VCC and low voltage to ground (GND)
  2. For all the combinations of the 8 bit inputs A ( A7A6A5A4A3A2A1A0), B ( B7B6B5B4B3B2B1B0)) verify that the LEDs are ON or not.
  3. Enter binary input A=10011011 (Decimal value is 155), B=10011011 (Decimal value is 155). Output A=B, the led will be on.
  4. Enter binary input A=11001101 (Decimal value is 205), B=10010001 (Decimal value is 145). Output A>B, the led will be on.
  5. Enter binary input A=1101001 (Decimal value is 105), B=10000111 (Decimal value is 135). Output A< B, the led will be on.
  6. Enter other input combination of A and B.
  7. Note: Red button symbolize as Low (L), Green button symbolize as High (H).

TRUTH TABLE

ABOutput
A7A6A5A4A3A2A1A0B7B6B5B4B3B2B1B0A>BA<BA=B

CIRCUIT DIAGRAM

circuit image