emitter
Definition
- Noun:
- The electrode in a transistor where electrons originate: In electronics, the "emitter" is one of the three terminals (emitter, base, collector) in a bipolar junction transistor (BJT). It is the region from which charge carriers (electrons or holes) are injected into the base region.
- A source that emits something: More generally, an "emitter" can refer to any object or device that sends out or gives off something, such as light, sound, particles, or signals.
Examples of Usage
- Noun (Electronics):
- In an NPN transistor, the emitter emits electrons into the base.
- The circuit design requires connecting the emitter to ground.
- Noun (General Source):
- The infrared emitter on the remote control sends signals to the television.
- The factory was identified as a major pollutant emitter.
Advanced Usage
- "Emitter-coupled logic (ECL)": A high-speed integrated circuit technology where the primary switching components are configured as a differential amplifier with emitters coupled together.
- Emitter-coupled logic is known for its very fast operation but high power consumption.
- "Emitter follower": A common collector amplifier configuration where the output voltage follows the input voltage, providing high current gain.
- The emitter follower circuit is often used as a buffer stage.
Variants and Related Words
- Emit (verb): To send out or give off (light, sound, a smell, etc.).
- The device emits a high-pitched sound.
- Emission (noun): The act of emitting or something that is emitted.
- The new regulations aim to reduce carbon emissions.
Synonyms
- Source: A place, person, or thing from which something originates.
- Origin: The point or place where something begins.
- Transmitter: A device that sends out signals (specific to signals/waves).
Related Phrases/Phrasal Verbs
(Note: "Emitter" is primarily a noun and does not have standard phrasal verbs. Related action is described with the verb "emit.") - "To emit from": To be sent out from a source. - Light emitted from the star takes years to reach us.
Related Idioms
(Note: There are no common idioms specifically using the word "emitter.")
Noun
-
the electrode in a transistor where electrons originate
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