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Amateur Extra: N-Type Charge Carriers

Charge Transfer

Extra question of the day is from sub-element 6 (circuit components) section A (n-type semiconductors) [E6A16] What are the majority charge carriers in N-type semiconductor material? A. Holes B. Free electrons C. Free protons D. Free neutrons First, remember what the N-type designator means.  It indicates that the device uses Negatively charged carriers.   Protons and …

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Amateur Extra: What is a Parametric Amplifier?

Variable Capacitor

Today’s exam question comes from the Amateur Extra exam, Sub-element 7 (Practical Circuits) and Section B, (Amplifiers)…  [E7B20] What is a parametric amplifier? A. A type of bipolar operational amplifier with excellent linearity derived from use of very high voltage on the collector B. A low-noise VHF or UHF amplifier relying on varying reactance for …

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