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2. RF power amplifier - Wikipedia

   en.wikipedia.org/wiki/RF_power_amplifier

   A radio-frequency power amplifier ( RF power amplifier) is a type of electronic amplifier that converts a low-power radio-frequency (RF) signal into a higher-power signal. [ 1] Typically, RF power amplifiers are used in the final stage of a radio transmitter, their output driving the antenna. Design goals often include gain, power output ...

3. Audio power amplifier - Wikipedia

   en.wikipedia.org/wiki/Audio_power_amplifier

   Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus 1 Hi Fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.

4. Linear amplifier - Wikipedia

   en.wikipedia.org/wiki/Linear_amplifier

   A linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load. The term usually refers to a type of radio-frequency (RF) power amplifier, some of which have output power measured in kilowatts, and are used in amateur radio. Other types of linear amplifier are used in ...

5. Amplifier - Wikipedia

   en.wikipedia.org/wiki/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). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude (magnitude of the voltage or current) of a signal applied to its input ...

6. Radio receiver - Wikipedia

   en.wikipedia.org/wiki/Radio_receiver

   A portable battery-powered AM/FM broadcast receiver, used to listen to audio broadcast by local radio stations. A modern communications receiver, used in two-way radio communication stations to talk with remote locations by shortwave radio. Girl listening to vacuum tube console radio in the 1940s.

7. Intermediate-frequency amplifier - Wikipedia

   en.wikipedia.org/wiki/Intermediate-frequency...

   More modern IF amplifier and demodulator in integrated circuit form. Intermediate-frequency (IF) amplifiers are amplifier stages used to raise signal levels in radio and television receivers, at frequencies intermediate to the higher radio-frequency (RF) signal from the antenna and the lower (baseband) audio or video frequency that the receiver ...

8. Antenna amplifier - Wikipedia

   en.wikipedia.org/wiki/Antenna_amplifier

   In electronics, an antenna amplifier (also: aerial amplifier or booster) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 ohm for coaxial cable and 300 ohm for twin-lead cable . An antenna amplifier boosts a radio signal considerably for devices that receive radio ...

9. Magnetic amplifier - Wikipedia

   en.wikipedia.org/wiki/Magnetic_amplifier

   Magnetic amplifier. A small magnetic amplifier rated at 250 watts and designed to operate on 120 VAC, 60 Hz. The large center winding is the control winding. The magnetic amplifier (colloquially known as a "mag amp") is an electromagnetic device for amplifying electrical signals. The magnetic amplifier was invented early in the 20th century ...