Diode PINE

A diode PINE ( Positive intrinsic negative diode in English) is a Diode consisted of a zone not-doped, known as intrinsic I, intercalated between 2 doped zones P and NR.

A diode PINE polarized in the direct direction (busy) offers a dynamic impedance (with respect to the variable signals) extrèmement low. Polarized in the opposite direction (blocked) it offers a very great impedance and especially a very LOW capacity (It behaves like a condenser of very low value, a few picofarads, even much less still according to the models).

They are commutation diodes fast used for the signals of high frequencies like:

circuits attenuators
phase-shifting switches

For example to commutate the antenna in turn on the transmitter part then on the receiver part of a transmitter-receiver.

Another example: commutation of inductances in order to cover a broad frequency band on receivers multi-bands (receivers of traffic).

External bonds and documents

Example of characteristics of a current diode PINE: The BA479

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