Definition
An electronic amplifier circuit designed to increase the magnitude of an electrical current while keeping the voltage relatively unchanged. It accepts a small input current and produces a larger output current capable of driving a load that the original signal could not.
Plain English
A circuit that takes a weak electrical signal and boosts how much current it can deliver, so it has enough strength to operate something like a relay, motor, or indicator.
Context Anchor
Seen in aircraft electrical and electronic system discussions, especially in radios, sensors, indicators, and control circuits.
Derivation
From Latin 'currere' (to run or flow), describing the flow of electrons, and 'amplificare' (to enlarge). Together: a device that enlarges the flow.
Why Pilots Care
It ensures weak electrical signals reach cockpit instruments and control systems with enough strength for accurate readings and safe operation.
Intuition Check
Current does not mean “right now” here. It means the flow of electricity in a circuit.
Example Sentence 1
The autopilot's signal was too weak to move the control servo directly, so a current amplifier was used to drive it.
Example Sentence 2
During electrical system checks, the technician tested the current amplifier to confirm it delivered sufficient power to the navigation instruments.