crystal detector
Definition
- Noun:
- A type of early radio signal detector: A "crystal detector" is a simple electronic device used in early radio receivers to convert alternating current (AC) radio signals into direct current (DC) signals that can be heard through headphones. It consists of a thin wire (called a "cat's whisker") making contact with a piece of crystalline mineral, such as galena (lead sulfide).
Examples of Usage
- Noun:
- Early amateur radio enthusiasts often built their own receivers using a crystal detector.
- The simplicity of the crystal detector made it a crucial component in the development of early wireless communication.
Advanced Usage
- Historical Context: The term is primarily used in historical or technical discussions about the early history of radio and electronics.
- The crystal detector, though obsolete, represents a fundamental principle in semiconductor technology.
Variants and Related Words
- Cat's whisker detector: Another name for a crystal detector, emphasizing the fine wire component.
- Semiconductor diode: A modern solid-state electronic component that performs a similar rectifying function and evolved from the principle of the crystal detector.
Synonyms
- Rectifier: A general term for any device that converts alternating current to direct current.
- Demodulator: A device that extracts the information-bearing signal from a carrier wave.
Related Phrases
- Crystal set: A simple radio receiver that uses a crystal detector, typically without a power amplifier.
- He built a crystal set as a science project to demonstrate basic radio principles.
Noun
-
a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier
