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Detector (radio), the Glossary

In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage.^[1]

70 relations: Amplitude modulation, Arnold tongue, Audio signal, Capacitor, Carrier wave, Coherer, Continuous wave, Crystal detector, Crystal radio, Cutoff frequency, Demodulation, Diode, Electrical reactance, Electrolytic detector, Electronic filter, Envelope (waves), Envelope detector, Feedback, Field-effect transistor, Foster–Seeley discriminator, Frequency mixer, Frequency modulation, Gilbert cell, Grid-leak detector, Heterodyne, Hot-wire barretter, Information, Integral, Integrated circuit, Intermediate frequency, LC circuit, Limiter, Local oscillator, Lock-in amplifier, Low-pass filter, Magnetic detector, Modulation, Morse code, Nonlinear system, On–off keying, Phase (waves), Phase modulation, Phase-locked loop, Plate detector (radio), Precision rectifier, Product detector, Pulse-width modulation, Radio, Radio frequency, Radio receiver, ... Expand index (20 more) »
Demodulation
Detectors

Amplitude modulation

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave.

See Detector (radio) and Amplitude modulation

Arnold tongue

In mathematics, particularly in dynamical systems, Arnold tongues (named after Vladimir Arnold) Section 12 in page 78 has a figure showing Arnold tongues.

See Detector (radio) and Arnold tongue

Audio signal

An audio signal is a representation of sound, typically using either a changing level of electrical voltage for analog signals, or a series of binary numbers for digital signals.

See Detector (radio) and Audio signal

Capacitor

In electrical engineering, a capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other.

See Detector (radio) and Capacitor

In telecommunications, a carrier wave, carrier signal, or just carrier, is a periodic waveform (usually sinusoidal) that carries no information that has one or more of its properties modified (the called modulation) by an information-bearing signal (called the message signal or modulation signal) for the purpose of conveying information.

See Detector (radio) and Carrier wave

Coherer

The coherer was a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the 20th century. Detector (radio) and coherer are detectors and radio electronics.

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Continuous wave

A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, typically a sine wave, that for mathematical analysis is considered to be of infinite duration.

See Detector (radio) and Continuous wave

Crystal detector

A crystal detector is an obsolete electronic component used in some early 20th century radio receivers that consists of a piece of crystalline mineral which rectifies the alternating current radio signal. Detector (radio) and crystal detector are detectors and radio electronics.

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Crystal radio

A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio. Detector (radio) and crystal radio are radio electronics.

See Detector (radio) and Crystal radio

Cutoff frequency

In physics and electrical engineering, a cutoff frequency, corner frequency, or break frequency is a boundary in a system's frequency response at which energy flowing through the system begins to be reduced (attenuated or reflected) rather than passing through.

See Detector (radio) and Cutoff frequency

Demodulation

Demodulation is extracting the original information-bearing signal from a carrier wave. Detector (radio) and Demodulation are radio electronics.

See Detector (radio) and Demodulation

Diode

A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance).

See Detector (radio) and Diode

Electrical reactance

In electrical circuits, reactance is the opposition presented to alternating current by inductance and capacitance.

See Detector (radio) and Electrical reactance

Electrolytic detector

The electrolytic detector, or liquid barretter, was a type of detector (demodulator) used in early radio receivers. Detector (radio) and electrolytic detector are detectors and radio electronics.

See Detector (radio) and Electrolytic detector

Electronic filter

Electronic filters are a type of signal processing filter in the form of electrical circuits.

See Detector (radio) and Electronic filter

Envelope (waves)

In physics and engineering, the envelope of an oscillating signal is a smooth curve outlining its extremes. Detector (radio) and envelope (waves) are radio electronics.

See Detector (radio) and Envelope (waves)

Envelope detector

An envelope detector (sometimes called a peak detector) is an electronic circuit that takes a (relatively) high-frequency signal as input and outputs the envelope of the original signal. Detector (radio) and envelope detector are Demodulation and detectors.

See Detector (radio) and Envelope detector

Feedback

Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop.

See Detector (radio) and Feedback

Field-effect transistor

The field-effect transistor (FET) is a type of transistor that uses an electric field to control the flow of current in a semiconductor.

See Detector (radio) and Field-effect transistor

Foster–Seeley discriminator

The Foster–Seeley discriminator is a common type of FM detector circuit, invented in 1936 by Dudley E. Foster and Stuart William Seeley. Detector (radio) and Foster–Seeley discriminator are Demodulation.

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Frequency mixer

In electronics, a mixer, or frequency mixer, is an electrical circuit that creates new frequencies from two signals applied to it. Detector (radio) and frequency mixer are radio electronics.

See Detector (radio) and Frequency mixer

Frequency modulation

Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.

See Detector (radio) and Frequency modulation

Gilbert cell

In electronics, the Gilbert cell is a type of frequency mixer. Detector (radio) and Gilbert cell are radio electronics.

See Detector (radio) and Gilbert cell

Grid-leak detector

A grid leak detector is an electronic circuit that demodulates an amplitude modulated alternating current and amplifies the recovered modulating voltage. Detector (radio) and grid-leak detector are radio electronics.

See Detector (radio) and Grid-leak detector

Heterodyne

A heterodyne is a signal frequency that is created by combining or mixing two other frequencies using a signal processing technique called heterodyning, which was invented by Canadian inventor-engineer Reginald Fessenden.

See Detector (radio) and Heterodyne

Hot-wire barretter

The hot-wire barretter was a demodulating detector, invented in 1902 by Reginald Fessenden, that found limited use in early radio receivers. Detector (radio) and hot-wire barretter are detectors and radio electronics.

See Detector (radio) and Hot-wire barretter

Information

Information is an abstract concept that refers to something which has the power to inform.

See Detector (radio) and Information

Integral

In mathematics, an integral is the continuous analog of a sum, which is used to calculate areas, volumes, and their generalizations.

See Detector (radio) and Integral

Integrated circuit

An integrated circuit (IC), also known as a microchip, computer chip, or simply chip, is a small electronic device made up of multiple interconnected electronic components such as transistors, resistors, and capacitors.

See Detector (radio) and Integrated circuit

In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception. Detector (radio) and intermediate frequency are radio electronics.

See Detector (radio) and Intermediate frequency

LC circuit

An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together.

See Detector (radio) and LC circuit

Limiter

In electronics, a limiter is a circuit that allows signals below a specified input power or level to pass unaffected while attenuating (lowering) the peaks of stronger signals that exceed this threshold.

See Detector (radio) and Limiter

Local oscillator

In electronics, a local oscillator (LO) is an electronic oscillator used with a mixer to change the frequency of a signal. Detector (radio) and local oscillator are radio electronics.

See Detector (radio) and Local oscillator

Lock-in amplifier

A lock-in amplifier is a type of amplifier that can extract a signal with a known carrier wave from an extremely noisy environment.

See Detector (radio) and Lock-in amplifier

Low-pass filter

A low-pass filter is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency.

See Detector (radio) and Low-pass filter

Magnetic detector

The magnetic detector or Marconi magnetic detector, sometimes called the "Maggie", was an early radio wave detector used in some of the first radio receivers to receive Morse code messages during the wireless telegraphy era around the turn of the 20th century. Detector (radio) and magnetic detector are detectors and radio electronics.

See Detector (radio) and Magnetic detector

Modulation

In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal called the modulation signal that typically contains information to be transmitted.

See Detector (radio) and Modulation

Morse code

Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.

See Detector (radio) and Morse code

Nonlinear system

In mathematics and science, a nonlinear system (or a non-linear system) is a system in which the change of the output is not proportional to the change of the input.

See Detector (radio) and Nonlinear system

On–off keying

On–off keying (OOK) denotes the simplest form of amplitude-shift keying (ASK) modulation that represents digital data as the presence or absence of a carrier wave.

See Detector (radio) and On–off keying

Phase (waves)

In physics and mathematics, the phase (symbol φ or ϕ) of a wave or other periodic function F of some real variable t (such as time) is an angle-like quantity representing the fraction of the cycle covered up to t. It is expressed in such a scale that it varies by one full turn as the variable t goes through each period (and F(t) goes through each complete cycle).

See Detector (radio) and Phase (waves)

Phase modulation

Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission.

See Detector (radio) and Phase modulation

Phase-locked loop

A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Detector (radio) and phase-locked loop are radio electronics.

See Detector (radio) and Phase-locked loop

Plate detector (radio)

In electronics, a plate detector (anode bend detector, grid bias detector) is a vacuum tube circuit in which an amplifying tube having a control grid is operated in a non-linear region of its grid voltage versus plate current transfer characteristic, usually near plate current cutoff, to demodulate amplitude modulated carrier signal.

See Detector (radio) and Plate detector (radio)

Precision rectifier

The precision rectifier is a configuration obtained with an operational amplifier in order to have a circuit behave like an ideal diode and rectifier.

See Detector (radio) and Precision rectifier

Product detector

A product detector is a type of demodulator used for AM and SSB signals. Detector (radio) and product detector are Demodulation.

See Detector (radio) and Product detector

Pulse-width modulation

Pulse-width modulation (PWM), also known as pulse-duration modulation (PDM) or pulse-length modulation (PLM), is any method of representing a signal as a rectangular wave with a varying duty cycle (and for some methods also a varying period).

See Detector (radio) and Pulse-width modulation

Radio

Radio is the technology of communicating using radio waves.

See Detector (radio) and Radio

Radio frequency

Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around.

See Detector (radio) and Radio frequency

Radio receiver

In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form.

See Detector (radio) and Radio receiver

Radiotelephone

A radiotelephone (or radiophone), abbreviated RT, is a radio communication system for conducting a conversation; radiotelephony means telephony by radio.

See Detector (radio) and Radiotelephone

RC time constant

The RC time constant, denoted (lowercase tau), the time constant (in seconds) of a resistor–capacitor circuit (RC circuit), is equal to the product of the circuit resistance (in ohms) and the circuit capacitance (in farads), i.e.: It is the time required to charge the capacitor, through the resistor, from an initial charge voltage of zero to approximately 63.2% of the value of an applied DC voltage, or to discharge the capacitor through the same resistor to approximately 36.8% of its final charge voltage.

See Detector (radio) and RC time constant

Rectifier

A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.

See Detector (radio) and Rectifier

Resistor

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.

See Detector (radio) and Resistor

Ring modulation

In electronics, ring modulation is a signal processing function, an implementation of frequency mixing, in which two signals are combined to yield an output signal.

See Detector (radio) and Ring modulation

Shortwave listening

Shortwave listening, or SWLing, is the hobby of listening to shortwave radio broadcasts located on frequencies between 1700 kHz and 30 MHz Listeners range from casual users seeking international news and entertainment programming, to hobbyists immersed in the technical aspects of long-distance radio reception and sending and collecting official confirmations (QSL cards) that document their reception of remote broadcasts (DXing).

See Detector (radio) and Shortwave listening

Sideband

In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, that are the result of the modulation process.

See Detector (radio) and Sideband

Single-sideband modulation

In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation used to transmit information, such as an audio signal, by radio waves.

See Detector (radio) and Single-sideband modulation

Standing wave ratio

In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Detector (radio) and standing wave ratio are radio electronics.

See Detector (radio) and Standing wave ratio

Superheterodyne receiver

A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency. Detector (radio) and superheterodyne receiver are radio electronics.

See Detector (radio) and Superheterodyne receiver

Synchronous detector

In electronics, a synchronous detector is a device that recovers information from a modulated signal by mixing the signal with a replica of the unmodulated carrier.

See Detector (radio) and Synchronous detector

Tikker

A tikker, alternately spelled ticker, was a vibrating interrupter used in early wireless telegraphy radio receivers such as crystal radio receivers in order to receive continuous wave (CW) radiotelegraphy signals.

See Detector (radio) and Tikker

Transformer

In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.

See Detector (radio) and Transformer

Transistor

A transistor is a semiconductor device used to amplify or switch electrical signals and power.

See Detector (radio) and Transistor

Tuner (radio)

A tuner is a subsystem that receives radio frequency (RF) transmissions, such as FM broadcasting, and converts the selected carrier frequency and its associated bandwidth into a fixed frequency that is suitable for further processing, usually because a lower frequency is used on the output. Detector (radio) and tuner (radio) are radio electronics.

See Detector (radio) and Tuner (radio)

Vacuum tube

A vacuum tube, electron tube, valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.

See Detector (radio) and Vacuum tube

Voltage-controlled oscillator

A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. Detector (radio) and voltage-controlled oscillator are radio electronics.

See Detector (radio) and Voltage-controlled oscillator

Wireless telegraphy

Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables.

See Detector (radio) and Wireless telegraphy

Wunderlich (vacuum tube)

Wunderlich refers to a series of vacuum tubes introduced in the early 1930s.

See Detector (radio) and Wunderlich (vacuum tube)

XOR gate

XOR gate (sometimes EOR, or EXOR and pronounced as Exclusive OR) is a digital logic gate that gives a true (1 or HIGH) output when the number of true inputs is odd.

See Detector (radio) and XOR gate

References

[1] https://en.wikipedia.org/wiki/Detector_(radio)

Also known as Cymoscope, Detector (electronics), Detector radio, Detector radio receiver, Detector receiver, Discriminator detector, Electric wave detector, FM detector, Frequency discriminator, Quadrature detection, Quadrature detector, Signal detector, Slope detection, Slope detector.

, Radiotelephone, RC time constant, Rectifier, Resistor, Ring modulation, Shortwave listening, Sideband, Single-sideband modulation, Standing wave ratio, Superheterodyne receiver, Synchronous detector, Tikker, Transformer, Transistor, Tuner (radio), Vacuum tube, Voltage-controlled oscillator, Wireless telegraphy, Wunderlich (vacuum tube), XOR gate.

Detector (radio), the Glossary

Table of Contents

See also

Demodulation

Detectors

References