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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 .

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. Power amplifier classes - Wikipedia

   en.wikipedia.org/wiki/Power_amplifier_classes

   In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier 's characteristics and performance. The first three classes are related to the time period that the active amplifier device is passing current, expressed as a fraction of the period of a ...

5. Amplifier - Wikipedia

   en.wikipedia.org/wiki/Amplifier

   In general, the power amplifier is the last 'amplifier' or actual circuit in a signal chain (the output stage) and is the amplifier stage that requires attention to power efficiency. Efficiency considerations lead to the various classes of power amplifiers based on the biasing of the output transistors or tubes: see power amplifier classes below.

6. Fryette Amplification - Wikipedia

   en.wikipedia.org/wiki/Fryette_Amplification

   The Power Station serves as a power attenuator, power booster, and reamping device with a passive line out and posts load amp effects loop. The internal power amp response can be adjusted using dedicated Presence and Depth controls based on Fryette's original Depth Control design introduced in 1988. Aether Amplifier. Also introduced in 2014 ...

7. Doherty amplifier - Wikipedia

   en.wikipedia.org/wiki/Doherty_amplifier

   The Doherty amplifier is a modified class B radio frequency amplifier invented by William H. Doherty of Bell Telephone Laboratories Inc in 1936. Whereas conventional class B amplifiers can clip on high input-signal levels, the Doherty power amplifier can accommodate signals with high peak-to-average power ratios by using two amplifier circuits within the one overall amplifier to accommodate ...