ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 2
The PN junction has a unique ability to offer very little
resistance to current flow in the forwardbiased direction but
maximum resistance to current flow when reverse biased. For
this reason, the PN junction is commonly used as a diode to
convert ac to dc. Figure {84 shows a plot of the voltage
current relationship (characteristic curve) for a typical PN
junction diode.
FIGURE 84. PN JUNCTION DIODE CHARACTERISTIC CURVE.
k. PN Junction Application. The PN junction's. application
expands into many different areas, from a simple voltage
protection device to an amplifying diode. Two of the most
commonly used applications for the PN junction are the SIGNAL
DIODE (mixing, detecting, and switching signals) and the
RECTIFYING DIODE (converting ac to dc).
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