Vonada's Engineering Maxims
Friday, December 02 2016 @ 14:55 CET
Contributed by: tingo
From a mailing list. Vonada's Engineering Maxims (for digital circuits)
- There is no such thing as ground.
- Digital circuits are made from analog parts.
- Prototype designs always work.
- Asserted timing conditions are designed first; unasserted timing conditions are found later.
- When all but one wire in a group of wires switch, that one will switch also.
- When all but one gate in a module switches, that one will switch also.
- Every little pico farad has a nano henry all its own.
- Capacitors convert voltage glitches to current glitches (conservation of energy).
- Interconnecting wires are probably transmission lines.
- Synchronizing circuits may take forever to make a decision.
- Worst-case tolerances never add -- but when they do, they are found in the best customer's machine.
- Diagnostics are highly efficient in finding solved problems.
- Processing systems are only partially tested since it is impractical to simulate all possible machine states.
- Murphy's Laws apply 95 percent of the time. The other 5 percent of the time is a coffee break.