PIN diode is a diode with a wide, undoped intrinsic semiconductor region between a p-type semiconductor and an n-type semiconductor region.
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10 Facts About PIN diode
1.
2.
PIN diode operates under what is known as high-level injection.
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3.
PIN diode obeys the standard diode equation for low-frequency signals.
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4.
The P-I-N PIN diode has a relatively large stored charge adrift in a thick intrinsic region.
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5.
Under a forward bias of 1 mA, a typical PIN diode will have an RF resistance of about, making it a good conductor of RF.
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6.
PIN diode switches are used not only for signal selection, but component selection.
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7.
At high frequencies, the PIN diode appears as a resistor whose resistance is an inverse function of its forward current.
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8.
Consequently, PIN diode can be used in some variable attenuator designs as amplitude modulators or output leveling circuits.
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9.
When used as a shunt limiter the PIN diode is a low impedance over the entire RF cycle, unlike paired rectifier diodes that would swing from a high resistance to a low resistance during each RF cycle clamping the waveform and not reflecting it as completely.
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10.
The depletion region of a PIN diode structure extends across the intrinsic region, deep into the device.
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