3 ms·
Negative Resistance
- peter_d_sherman 6y ago>"In electronics, negative resistance (NR) is a property of some electrical circuits and devices in which an increase in voltage across the device's terminals results in a decrease in electric current through it.[4][5]" PDS: Which, conversely, would mean that a decrease in voltage -- would result in an increase of current... So, next question: What happens when the voltage is zero? Does current/current capacity increase to infinite? Or is there some limit? What about just before zero, like 0.0001 volts? Also, what about negative (reversed) voltages? (Note To Future Self: Investigate this...)
- ColinWright 6y agoUsing a 741 op-amp you can create a circuit which has negative resistance over a range, but once you go outside that range the linearity disappears and the relationship between voltage and current is otherwise. These are areas where you need to be explicit about ranges and limits. Enjoy!
- peter_d_sherman 6y agoOp-amps are an interesting and vital part of electronics as we know it; however, op-amps are typically very sensitive and frail (with respect to amperage/voltage limits). I was thinking more along the lines of gas/plasma tubes, which, on the low end, could be a common fluorescent light bulb (albeit one with modified current limitation circuitry), to large radio (and other types) of gas/discharge tubes on the high end... But, that being said, there's certainly nothing wrong with op-amps...