An electronics technician is analyzing solid-state switching and amplification circuits. Match each transistor operating region to its corresponding junction biasing condition and functional circuit behavior.
- BJT Cutoff RegionBoth the base-emitter and base-collector junctions are reverse-biased, resulting in negligible current conduction and acting as an open switch.
- BJT Saturation RegionBoth the base-emitter and base-collector junctions are forward-biased, causing maximum current flow with minimum collector-emitter voltage drop and acting as a closed switch.
- BJT Forward-Active RegionThe base-emitter junction is forward-biased while the base-collector junction is reverse-biased, allowing base current to linearly control a larger collector current.
- JFET Ohmic (Linear) RegionThe gate-source depletion region leaves the channel unpinched at low drain-to-source voltages, allowing the channel to function as a voltage-controlled variable resistor.
Answer
BJT Cutoff matches both junctions reverse-biased (open switch); BJT Saturation matches both junctions forward-biased (closed switch); BJT Forward-Active matches forward-biased base-emitter and reverse-biased base-collector (linear amplification); JFET Ohmic Region matches unpinched channel at low drain voltage (voltage-controlled resistor).
Transistor states are governed by internal PN junction bias levels and gate field controls: Cutoff has both BJT junctions reverse-biased (acting as an open switch), Saturation has both BJT junctions forward-biased (acting as a closed switch), Forward-Active utilizes a forward-biased base-emitter and reverse-biased base-collector junction for linear amplification, and the JFET Ohmic region operates prior to pinch-off as a voltage-controlled variable resistor.
Step-by-Step Solution
Key Concept
Transistor Operating States, Biasing Rules, and Terminal Relationships
Estimated Time:1m 30s