superhet
Noun: A superhet is a type of radio receiver. Its full technical name is a superheterodyne receiver. It works by combining the incoming radio signal's carrier frequency with a frequency generated inside the receiver itself. This process creates a new, fixed intermediate frequency signal that is easier to filter and amplify before the sound information is finally extracted (demodulated) and made louder.
The term superhet is a technical abbreviation used primarily in electronics and radio engineering contexts. - Most modern AM and FM radios are based on the superhet design for improved selectivity and sensitivity. - The engineer explained that the key advantage of a superhet is its ability to receive weak signals clearly.
- Superhet is almost exclusively used as a shortened, informal form of superheterodyne. In formal technical writing, the full term is preferred.
- The principle is so dominant that the term can sometimes be used attributively (like an adjective) to describe the technology or a component.
- The superhet circuit revolutionized radio design in the 20th century.
- Superheterodyne (n & adj): The full, formal term for the receiver or its operating principle.
- Heterodyne (v & adj): Refers to the technical process of combining two frequencies to produce new ones (sum and difference frequencies). A superhet is a specific application of heterodyning.
- Superheterodyne receiver: The complete and formal synonym.
- IF receiver (Intermediate Frequency receiver): Highlights the key internal signal created by the superhet process.
- Intermediate Frequency (IF): The fixed, lower frequency signal produced inside the superhet receiver.
- Local Oscillator (LO): The internal circuit that generates the frequency mixed with the incoming signal.
- Mixer: The stage in the receiver where the incoming signal and the local oscillator signal are combined.
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a radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplified
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