LEDs have also been used as a medium-quality voltage reference in electronic circuits. The forward voltage drop (e.g. about 1.7 V for a normal red LED) can be used instead of a Zener diode in low-voltage regulators. Red LEDs have the flattest I/V curve above the knee. Nitride-based LEDs have a fairly steep I/V curve and are useless for this purpose. Although LED forward voltage is far more current-dependent than a Zener diode, Zener diodes with breakdown voltages below 3 V are not widely available.
LEDs have also been used as a medium - quality voltage reference in electronic circuits . The forward voltage drop ( e.g. about 1.7 V for a normal red LED ) can be used instead of a Zener diode in low - voltage regulators . Red LEDs have the flattest I / V curve above the knee . Nitride - based LEDs have a fairly steep I / V curve and are useless for this purpose . Although LED forward voltage is far more current - dependent than a Zener diode , Zener diodes with breakdown voltages below 3 V are not widely available .
What LEDs have a very steep I/V curve?
What LEDs have a very steep I / V curve ?
Nitride-based LEDs
Nitride-based LEDs