Amateur Extra › E6 Circuit Components › E6B11
E6B11
What is used to control the attenuation of RF signals by a PIN diode?
Pick an answer to check it.
Answer: A. Forward DC bias current
The RF resistance of a PIN diode drops as forward DC bias current increases. Varying that DC current lets the diode act as a variable RF attenuator.
Tip: More DC bias current = less RF resistance.