Check your knowledge about how ESD can ruin your day.
If there ever was a silent killer for electronic devices, it's ESD (electrostatic discharge). A little zap from a finger, a charged metallic part, or an IC tray can cause an inrush of current that can damage sensitive IC. Trust me, for I know. When replacing a hard drive on a computer some years ago, I powered it and found that nothing happened other than the power supply turning on. A discharge I couldn't feel was enough to kill the PC's motherboard. Since then I always wear charge-dissipating wrist straps when working on a computer. By the way, did you know that wrist straps decompose over time?
This week's quiz questions come from several papers that you can find at Techonline:
1. Why should ESD protection devices have minimal capacitance, preferably less than 0.5 pF?
- Too much capacitance will pull down power rails.
- Capacitance causes excessing EMI emissions.
- Capacitance reduces ESD protection.
- Too much capacitance on data lines can distort signals.