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Audio-frequency amplifier | Article about audio-frequency ...
https://encyclopedia2.thefreedictionary.com/audio-frequency+amplifier#:~:text=audio-frequency%20amplifier%20%5B%20%E2%80%B2%C8%AFd%C2%B7%C4%93%C2%B7%C5%8D%20%C2%A6fr%C4%93%C2%B7kw%C9%99n%C2%B7s%C4%93%20%C2%A6am%C2%B7pl%C9%99%E2%80%9Af%C4%AB%C2%B7%C9%99r%5D%20%28electronics%29%20An,in%20equipment%20used%20to%20record%20and%20reproduce%20sound.
Amplifiers - Learn About Electronics
https://www.learnabout-electronics.org/Amplifiers/amplifiers10.php
Audio frequency amplifiers are used to amplify signals in the range of human hearing, approximately 20Hz to 20kHz, although some Hi-Fi audio amplifiers extend this range up to around 100kHz, whilst other audio amplifiers may restrict the high frequency limit to 15kHz or less. Audio voltage amplifiers are used to amplify the low level signals from microphones, tape …
RADIO-FREQUENCY AMPLIFIERS. - NIST
https://nvlpubs.nist.gov/nistpubs/ScientificPapers/nbsscientificpaper449vol18p335_A2b.pdf
Audio-frequencyamplificationcancause extraneousnoisesbyamplifyingelectricaldisturbancesoflow frequency.Itisoftenadvantageoustouseradio-frequency amplificationevenifonlyonestageofaudio-frequencyamplifica-tionisused.Acertainminimumsignalisrequiredforgoodopera …
Introduction to RC coupled Audio Frequency Triode …
https://colinjs.com/elec/audio/triodeamp.htm
Audio-frequency amplifiers are intended to amplify frequencies (corresponding to the number of air pressure variations that occur per second) in the range that the human ear can hear. Frequency is associated directly with musical pitch, i.e. as …
Different Types of Amplifiers with their Working Principle
https://www.elprocus.com/types-of-amplifiers-with-workings/
Audio frequency amplifiers are used to amplify signals in the range of human hearing that approximately 20 Hz to 20 kHz. Some Hi-Fi audio amplifiers extend this range up to around 100 kHz ranges while other audio amplifiers may restrict the high frequency limit to 15 kHz or less. Audio Frequency Amplifier
AN APPROACH TO AUDIO FREQUENCY AMPLIFIER DESIGN
https://worldradiohistory.com/BOOKSHELF-ARH/Technology-General/An-Approach-to-Audio-Frequency-Amplifier-Design-General-Electric-1957-Adobe.pdf
The frequency range should be as wide as possible, say 30 to 25,000c/s or at least equal to that of the associated loudspeaker, record player, etc. The maximum distortion should be low, less than 0·5% for the best equipment nsing to perhaps 2% for cheaper amplifiers.
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