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The law
The law

Kirchhoff`s Voltage Law (KVL)
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... (!) When passing the resistor along the current direction, the potential decreases (the voltage is negative); When passing the resistor against the current direction, the potential increases (the voltage is positive); ...
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... characteristics provide the ultimate in high input impedance and “rail-to-rail” output swing, but unlike typical CMOS parts that might be powered by 5V, the LTC6090 can operate with supplies up to ±70V. The device can hold its own in the small-signal regime as well, featuring typical VOS under 500μV ...
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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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