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  2. Radio receiver design - Wikipedia

    en.wikipedia.org/wiki/Radio_receiver_design

    A crystal set receiver consisting of an antenna, a variable inductor, a cat's whisker, and a filter capacitor. A crystal receiver is very simple and can be easy to make or even improvise, for example, the foxhole radio. However, the crystal radio needs a strong RF signal and a long antenna to operate.

  3. Field strength meter - Wikipedia

    en.wikipedia.org/wiki/Field_strength_meter

    A field strength meter is actually a simple receiver. The RF signal is detected and fed to a microammeter, which is scaled in dBμ. The frequency range of the tuner is usually within the terrestrial broadcasting bands. Some FS meters can also receive satellite (TVRO and RRO) frequencies.

  4. Product detector - Wikipedia

    en.wikipedia.org/wiki/Product_detector

    Product detectors can be designed to accept either IF or RF frequency inputs. A product detector which accepts an IF signal would be used as a demodulator block in a superheterodyne receiver, and a detector designed for RF can be combined with an RF amplifier and a low-pass filter into a direct-conversion receiver.

  5. Circuit breaker analyzer - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker_analyzer

    A circuit breaker analyzer is an instrument that measures the parameters of a circuit breaker. [1]In 1984, Megger patented a digital circuit breaker analyzer, controlled by a microprocessor. in 2020 few companies develop software to control circuit breaker analyzers from different devices such as computers, tablet computer, smartphones and others.

  6. Glossary of electrical and electronics engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_electrical_and...

    short-circuit test A test of machines or apparatus where the load terminals are directly connected; usually done at reduced power to prevent damage, but destructive short circuit testing may be carried out on circuit protective devices. short circuit A path in a circuit that has negligible resistance; often un-intended, a fault. shunt

  7. File:Simple TRF receiver block diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Simple_TRF_receiver...

    English: Block diagram of a tuned radio frequency (TRF) receiver, the simplest type of amplifying radio receiver circuit. It consists of one or more tuned RF amplifiers, each consisting of a tuned circuit which functioned as a bandpass filter followed by a radio frequency (RF) amplifier; a detector (demodulator) to extract the audio waveform from the radio carrier wave; followed by an audio ...

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