Automatic frequency control (AFC) is a system used to regulate the frequency of an electronic oscillator. It is a vital component in many electronic devices, including radios, televisions, and communication systems. AFC ensures that the oscillator produces a stable frequency, even when there are variations in the input signal or the environment.
Definitions
Automatic frequency control is a closed-loop system that automatically adjusts the frequency of an oscillator to maintain a constant output frequency. The system uses feedback to compare the output frequency to a reference frequency and adjusts the oscillator accordingly.
Origin
The concept of automatic frequency control dates back to the early 1900s when engineers were developing radio communication systems. They realized that variations in the input signal and the environment could cause the frequency of the oscillator to drift, leading to poor reception. To solve this problem, they developed the first automatic frequency control systems, which used feedback to adjust the oscillator frequency.
Meaning in different dictionaries
According to Merriam-Webster, automatic frequency control is “a system for maintaining the frequency of an oscillator within specified limits by automatically adjusting the tuning circuits.”
The Oxford English Dictionary defines automatic frequency control as “a system for automatically adjusting the frequency of an oscillator to maintain a constant output frequency.”
Associations
Automatic frequency control is commonly used in radio communication systems, including AM and FM radios, as well as television broadcasting. It is also used in radar systems, satellite communication systems, and other electronic devices that require a stable oscillator frequency.
Synonyms
Synonyms for automatic frequency control include automatic frequency stabilization, automatic frequency compensation, and automatic frequency regulation.
Antonyms
Antonyms for automatic frequency control include manual frequency control, fixed frequency, and non-adjustable frequency.
The same root words
The same root words as automatic frequency control include automatic, frequency, and control.
Example Sentences
- The AFC system in our radio ensures that we always have clear reception, even when we’re driving through different areas.
- The satellite communication system uses AFC to maintain a stable frequency, even when the satellite is moving.
- The radar system uses automatic frequency control to adjust the frequency of the oscillator to detect objects at different distances.