The PN JUNCTION has a unique ability to offer very little resistance to current flow in the
forward-bias 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.
The PN JUNCTIONS APPLICATION expands 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).