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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
Chapter 10: Amplifiers Frequency Response
https://staff-old.najah.edu/sites/default/files/Chapter%2010.pdf
frequency) is a frequency at which Pout drops to one-half (50%) of its P(mid) Æ (at 3 dB reduction in the power gain) Also, at the critical frequencies the voltage gain is 70.7% of its midrange value and is expressed in dB as (at 3 dB reduction in the voltage gain) Example: A certain amplifier has a midrange rms output voltage of 10 V. What
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-frequencyamplification,therebeingamechanicalarrange- mentwhereby thecoupling between theprimaries and seconda- ries ofthe first two radio-frequencytransformerscould be varied
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 Amplifier Circuit, Working and details of Nx, Lm386 ...
https://www.watelectronics.com/audio-amplifier-circuit-working-and-applications/
Audio Amplifier Circuit. The circuit of the audio amplifier consists of a transistor a device to apply the input signals and a speaker at the output. The transistors are connected based on the necessity. The important factors that need to be considered while designing a audio amplifier is gain,noise, frequency response and distortion.Higher the gain higher will be the …
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