Function Call Latch
A synthesized parity function calculates the even parity of a 3-bit input to detect transmission errors.
Expected behavior:
| A | B | C | Parity | |-----|-----|-----|----------| | 0 | 0 | 0 | 0 | | 0 | 0 | 1 | 1 | | 0 | 1 | 0 | 1 | | 0 | 1 | 1 | 0 | | 1 | 0 | 0 | 1 | | 1 | 0 | 1 | 0 | | 1 | 1 | 0 | 0 | | 1 | 1 | 1 | 1 |
Simulation shows Parity = 1 when testing the input A=0, B=0, C=0 immediately after A=0, B=0, C=1. The expected output is 0. The circuit fails to update and retains a previous value for this specific input combination. Inspect the circuit and correct the fault.
Constraints
- The circuit must be strictly combinational.
- No feedback loops or state-holding elements are permitted in the final design.
Topics
Solve this problem
Place the gates, wire them up and watch the signals settle. Every submission runs on the same simulation engine that grades it.
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