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Audio-frequency amplifier | Article about audio-frequency ...
https://encyclopedia2.thefreedictionary.com/audio-frequency+amplifier
audio-frequency amplifier. [ ′ȯd·ē·ō ¦frē·kwən·sē ¦am·plə‚fī·ər] (electronics) An electronic circuit for amplification of signals within, and in some cases above, the audible range of frequencies in equipment used to record and reproduce sound. Also known as audio amplifier.
The Design of Low-noise Audio-frequency Amplifiers
http://www.keith-snook.info/Stuff-you-should-read/Faulkner%20-%20The%20design%20of%20Low-noise%20audio%20frequency%20amplifiers.pdf
THE DESIGN OF LOW-NOISE AUDIO-FREQUENCY AMPLIFIERS considering current ratios, without explicitly referring to the magnitudes of the voltages appearing at the amplifier input terminals. A great deal of confusion has arisen over the rela tion between noise figure and input resistance. It should be clear from Fig. 3 that if an amplifier has a
Amplifiers - Learn About Electronics
https://www.learnabout-electronics.org/Amplifiers/amplifiers10.php
A.F. Amplifiers. 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 …
RADIO-FREQUENCY AMPLIFIERS. - NIST
https://nvlpubs.nist.gov/nistpubs/ScientificPapers/nbsscientificpaper449vol18p335_A2b.pdf
audio-frequencyamplification,therebeingamechanicalarrange- mentwhereby thecoupling between theprimaries and seconda- ries ofthe first two radio-frequencytransformerscould be varied
Amplifier Circuits - Learn About Electronics
https://www.learnabout-electronics.org/Downloads/amplifiers-module-04.pdf
audio frequency range. It is sometimes necessary however, to modify the flat response of an audio amplifier by making particular stages of the amplifier frequency dependent. This can be achieved by modifying either the response of one or more of the amplifier stages, or the response of a negative feedback path. ...
Different Types of Amplifiers with their Working Principle
https://www.elprocus.com/types-of-amplifiers-with-workings/
Audio Frequency Amplifiers 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 Amplifier Circuit
https://web.ece.ucsb.edu/Faculty/rodwell/Classes/ece2c/labs/Lab%201a%20-%202C%202007.pdf
Week #1: Audio amplifier Week #2: Microphone circuit The audio amplifier project is more difficult and time-consuming than the microphone pre-amp, so part of week #2 may be used to finish the audio amp. All breadboarding and testing can and should be done in lab. Soldering and hardwiring can and should be done outside lab.
Magnetic Audio Frequency Fundamentals
https://www.aes.org/aeshc/pdf/how.the.aes.began/vincent_magnetic-audio-fundamentals.pdf
Magnetic Audio Frequency Fundamentals A. M. VINCENT* Challenging the electron tube in its well established position as the basic amplifier com- ponent, the magnetic principles invoked offer a promising field of new development. E LECTRONIC ENGINEERS are beginning to accept the fact that competitors to the electron tube are not only a
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