Which transistor terminal is associated with the voltage output?

Which transistor terminal is associated with the voltage output?

• A. Base
• B. Collector
• C. Emitter
• D. Gate

Answer: (C)

In an emitter-follower arrangement, the voltage output comes from the emitter terminal. The base controls when the transistor conducts, while the emitter follows the base voltage (roughly base voltage minus 0.6–0.7 V for silicon), delivering a voltage to the load with low output impedance. That makes the emitter the output node in this setup, providing a useful voltage signal with good drive capability. The gate terminal isn’t used as the output for a BJT; it’s a control terminal in MOSFETs, where the output would typically be taken from the drain. In other common configurations (like common-emitter), the output is taken at the collector, so the specific configuration determines which terminal provides the voltage output.

In an emitter-follower arrangement, the voltage output comes from the emitter terminal. The base controls when the transistor conducts, while the emitter follows the base voltage (roughly base voltage minus 0.6–0.7 V for silicon), delivering a voltage to the load with low output impedance. That makes the emitter the output node in this setup, providing a useful voltage signal with good drive capability. The gate terminal isn’t used as the output for a BJT; it’s a control terminal in MOSFETs, where the output would typically be taken from the drain. In other common configurations (like common-emitter), the output is taken at the collector, so the specific configuration determines which terminal provides the voltage output.