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Radio receiver design, the Glossary

Radio receiver design includes the electronic design of different components of a radio receiver which processes the radio frequency signal from an antenna in order to produce usable information such as audio.^[1]

56 relations: Absolute zero, Amplifier, Amplitude modulation, Antenna (radio), Automatic gain control, Band-pass filter, Baseband, Carrier wave, Continuous wave, Cryogenics, Crystal detector, Decibel, Demodulation, Detector (radio), Diode, Direct-conversion receiver, Electronic design automation, Electronic engineering, Embedded system, Envelope detector, Filter (signal processing), Foxhole radio, Frequency, Frequency drift, Frequency mixer, Frequency-hopping spread spectrum, Gain (electronics), History of radio, Intermediate frequency, Intermodulation, Local oscillator, Low-pass filter, Modulation, Morse code, Noise blanker, Noise figure, Phase-locked loop, Positive feedback, Radio, Radio receiver, Reflex receiver, Regenerative circuit, Selectivity (radio), Sensitivity (electronics), Signal, Signal-to-noise ratio, Single-sideband modulation, Sound recording and reproduction, Spurious emission, Spurious tone, ... Expand index (6 more) »
History of radio technology
Receiver (radio)

Absolute zero

Absolute zero is the lowest limit of the thermodynamic temperature scale; a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as zero kelvin.

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Amplifier

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current).

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Amplitude modulation

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

See Radio receiver design and Amplitude modulation

Antenna (radio)

In radio engineering, an antenna (American English) or aerial (British English) is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. Radio receiver design and antenna (radio) are radio electronics.

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Automatic gain control

Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input.

See Radio receiver design and Automatic gain control

Band-pass filter

A band-pass filter or bandpass filter (BPF) is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.

See Radio receiver design and Band-pass filter

Baseband

In telecommunications and signal processing, baseband is the range of frequencies occupied by a signal that has not been modulated to higher frequencies.

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Carrier wave

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.

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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.

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Cryogenics

In physics, cryogenics is the production and behaviour of materials at very low temperatures.

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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. Radio receiver design and crystal detector are history of radio technology and radio electronics.

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Decibel

The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B).

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Demodulation

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

See Radio receiver design and Demodulation

Detector (radio)

In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage. Radio receiver design and detector (radio) are radio electronics.

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Diode

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

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Direct-conversion receiver

A direct-conversion receiver (DCR), also known as homodyne, synchrodyne, or zero-IF receiver, is a radio receiver design that demodulates the incoming radio signal using synchronous detection driven by a local oscillator whose frequency is identical to, or very close to the carrier frequency of the intended signal. Radio receiver design and direct-conversion receiver are radio electronics and receiver (radio).

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Electronic design automation

Electronic design automation (EDA), also referred to as electronic computer-aided design (ECAD), is a category of software tools for designing electronic systems such as integrated circuits and printed circuit boards.

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Electronic engineering

Electronic engineering is a sub-discipline of electrical engineering that emerged in the early 20th century and is distinguished by the additional use of active components such as semiconductor devices to amplify and control electric current flow.

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Embedded system

An embedded system is a computer system—a combination of a computer processor, computer memory, and input/output peripheral devices—that has a dedicated function within a larger mechanical or electronic system.

See Radio receiver design and Embedded system

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.

See Radio receiver design and Envelope detector

Filter (signal processing)

In signal processing, a filter is a device or process that removes some unwanted components or features from a signal.

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Foxhole radio

A foxhole radio is a makeshift radio that was built by soldiers in World War II for entertainment, to listen to local radio stations using amplitude modulation.

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Frequency

Frequency (symbol f), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time.

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Frequency drift

In electrical engineering, and particularly in telecommunications, frequency drift is an unintended and generally arbitrary offset of an oscillator from its nominal frequency.

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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. Radio receiver design and frequency mixer are radio electronics.

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Frequency-hopping spread spectrum

Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly changing the carrier frequency among many frequencies occupying a large spectral band.

See Radio receiver design and Frequency-hopping spread spectrum

Gain (electronics)

In electronics, gain is a measure of the ability of a two-port circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal.

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History of radio

The early history of radio is the history of technology that produces and uses radio instruments that use radio waves.

See Radio receiver design and History of radio

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. Radio receiver design and intermediate frequency are radio electronics.

See Radio receiver design and Intermediate frequency

Intermodulation

Intermodulation (IM) or intermodulation distortion (IMD) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system. Radio receiver design and intermodulation are radio electronics.

See Radio receiver design and Intermodulation

Local oscillator

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

See Radio receiver design and Local oscillator

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 Radio receiver design and Low-pass filter

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 Radio receiver design 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 Radio receiver design and Morse code

Noise blanker

A Citizen's Band transceiver equipped with a noise blanker for the receiver, controlled by a button on the front panel (2nd from right) In the design of radio receivers, a noise blanker is a circuit intended to reduce the effect of certain kinds of radio noise on a received signal. Radio receiver design and noise blanker are radio electronics and receiver (radio).

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Noise figure

Noise figure (NF) and noise factor (F) are figures of merit that indicate degradation of the signal-to-noise ratio (SNR) that is caused by components in a signal chain.

See Radio receiver design and Noise figure

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. Radio receiver design and phase-locked loop are radio electronics.

See Radio receiver design and Phase-locked loop

Positive feedback

Positive feedback (exacerbating feedback, self-reinforcing feedback) is a process that occurs in a feedback loop which exacerbates the effects of a small disturbance.

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Radio

Radio is the technology of communicating using radio waves.

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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. Radio receiver design and radio receiver are receiver (radio).

See Radio receiver design and Radio receiver

Reflex receiver

A reflex radio receiver, occasionally called a reflectional receiver, is a radio receiver design in which the same amplifier is used to amplify the high-frequency radio signal (RF) and low-frequency audio (sound) signal (AF). Radio receiver design and reflex receiver are history of radio technology, radio electronics and receiver (radio).

See Radio receiver design and Reflex receiver

Regenerative circuit

A regenerative circuit is an amplifier circuit that employs positive feedback (also known as regeneration or reaction). Radio receiver design and regenerative circuit are radio electronics and receiver (radio).

See Radio receiver design and Regenerative circuit

Selectivity (radio)

Selectivity is a measure of the performance of a radio receiver to respond only to the radio signal it is tuned to (such as a radio station) and reject other signals nearby in frequency, such as another broadcast on an adjacent channel.

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Sensitivity (electronics)

The sensitivity of an electronic device, such as a communications system receiver, or detection device, such as a PIN diode, is the minimum magnitude of input signal required to produce a specified output signal having a specified signal-to-noise ratio, or other specified criteria.

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Signal

Signal refers to both the process and the result of transmission of data over some media accomplished by embedding some variation.

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Signal-to-noise ratio

Signal-to-noise ratio (SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.

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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.

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Sound recording and reproduction

Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects.

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Spurious emission

In radio communication, a spurious emission is any component of a radiated radio frequency signal the complete suppression of which would not impair the integrity of the modulation type or the information being transmitted.

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Spurious tone

In electronics (radio in particular), a spurious tone (also known as an interfering tone, a continuous tone or a spur) denotes a tone in an electronic circuit which interferes with a signal and is often masked underneath that signal.

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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. Radio receiver design and superheterodyne receiver are history of radio technology, radio electronics and receiver (radio).

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Telecommunications

Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information with an immediacy comparable to face-to-face communication.

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Telecommunications engineering

Telecommunications engineering is a subfield of electronics engineering which seeks to design and devise systems of communication at a distance.

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Triode

A triode is an electronic amplifying vacuum tube (or thermionic valve in British English) consisting of three electrodes inside an evacuated glass envelope: a heated filament or cathode, a grid, and a plate (anode).

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Tuned radio frequency receiver

A tuned radio frequency receiver (or TRF receiver) is a type of radio receiver that is composed of one or more tuned radio frequency (RF) amplifier stages followed by a detector (demodulator) circuit to extract the audio signal and usually an audio frequency amplifier. Radio receiver design and tuned radio frequency receiver are history of radio technology, radio electronics and receiver (radio).

See Radio receiver design and Tuned radio frequency receiver

Watt

The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3.

See Radio receiver design and Watt

References

[1] https://en.wikipedia.org/wiki/Radio_receiver_design

, Superheterodyne receiver, Telecommunications, Telecommunications engineering, Triode, Tuned radio frequency receiver, Watt.

Radio receiver design, the Glossary

Table of Contents

See also

History of radio technology

Receiver (radio)

References