A Zener diode, when reverse biased ( as shown in the circuit ) has a constant voltage drop across it irrespective of the current flowing through it.
12.
I know that the p-n or the base emitter junction is forward biased and the base-collector is reverse biased for a BJT to operate.
13.
Adding the capability of receiving mobile light communication to electronic gadgets is also low cost, since a reverse biased LED or color sensor chip costs very little.
14.
Further, photodiodes are reverse biased and saturate for optical powers above a certain value ( typically in mW ), making thermopile sensors suitable for high power measurements.
15.
Popular makeshift varicaps include LEDs, 1N400X series rectifier diodes, Schottky rectifiers and various transistors used with their collector-base junctions reverse biased, particularly the 2N2222 and BC547.
16.
The design consisted of three semiconductor layers, located one on the other, with a barrier layer below the photosensitive junction in the form of a reverse biased second junction.
17.
If the emitter-base junction is reverse biased into Zener mode and charge flows for a short period of time, the current gain of the BJT will be permanently degraded.
18.
In this field varactor diodes are used as a voltage variable capacitor in frequency multipliers, parametric amplifiers and variable junction when reverse biased which is the source of the capacitor effect.
19.
When in the high capacitance state, usually with low or no bias, they present a low impedance path to RF, whereas when reverse biased their capacitance abruptly decreases and their RF impedance increases.
20.
In a simple P-N junction diode, if the a positive + 6 volts potential is applied to the P terminal and a + 3 volts applied to the n-terminal, is the diode forward biased or is it reverse biased?
