Which term describes circuits that regulate output voltage regardless of load current variations?

Which term describes circuits that regulate output voltage regardless of load current variations?

• A. Reverse bias
• B. Active filters
• C. Band-pass
• D. Power Supply Circuits

Answer: (D)

Voltage regulation in power supplies keeps the output constant as the load current changes. Regulated power supplies use feedback, a reference, and a control element to adjust the output so that even when more or less current is drawn, the voltage stays within spec. This can be done with linear regulators or switching regulators, both of which are designed to maintain a stable voltage for avionics and other equipment. The other terms describe different functions: reverse bias is a diode condition that blocks current, filters (including active and band-pass) shape signal frequencies rather than regulate DC voltage, so they don’t provide maintenance of output voltage under varying load. In practice, circuits that ensure a steady voltage under changing load are power supply circuits.

Voltage regulation in power supplies keeps the output constant as the load current changes. Regulated power supplies use feedback, a reference, and a control element to adjust the output so that even when more or less current is drawn, the voltage stays within spec. This can be done with linear regulators or switching regulators, both of which are designed to maintain a stable voltage for avionics and other equipment. The other terms describe different functions: reverse bias is a diode condition that blocks current, filters (including active and band-pass) shape signal frequencies rather than regulate DC voltage, so they don’t provide maintenance of output voltage under varying load. In practice, circuits that ensure a steady voltage under changing load are power supply circuits.