A PIN diode is a semiconductor device that operates as a variable resistor at RF and microwave frequencies. The resistance value of the PIN diode is determined only by the forward biased dc current. In switch and attenuator applications, the PIN diode should ideally control the RF signal level without introducing distortion which might change the shape of the RF signal. An important addition...
This Application Note goes over the Basics of Pin Diodes - Covers points such as Break Down Voltage, Q Factor, Switching Considerations, Temperature effects on premormance and more.
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