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Basics of Audio Amplifier - 1/9 - Engineers Garage
https://www.engineersgarage.com/basics-of-audio-amplifier-1-9/#:~:text=The%20output%20current%20of%20these%20amplifiers%20is%20in,the%20noise%20and%20distortion%20in%20the%20output%20signal.
Output Power of Audio Amplifier
https://amplifier.cd/Tutorial/Power/output_power.htm
Two channels are used. Channel 1 measures the amplifiers output voltage by using a probe. Channel 2 measure the current with a sufficient fast current probe e.g. Tektronix P6042, P6019 / 134, or AM503. Channel 1 is to be multiplied by channel 2 in the computer of the oscilloscope and for this product is during one period the integral to be formed.
Amplifiers: Output stage - Lenard Audio
https://education.lenardaudio.com/en/12_amps_5.html
Darlington complementary is the basic order in how the output stage of an amplifier is taught. All output transistors are arranged as emitter followers. The collectors are connected directly to the rails. The emitter follows the signal on base within 650mV. The output transistors do not increase the size of the audio signal. Output transistors can only add …
New Audio Amplifiers With Current Amplifier Outputs.
http://nov79.com/amr/amf1.htm
The current amplifier solves the output problem by following the voltage amplifier with a circuit which gains the current (and hence, load driving capacity) without internal voltage gain. The current amplifier is low in noise because of the absence of internal voltage gain. It is also low in distortion because of its high speed.
Basics of Audio Amplifier - 1/9 - Engineers Garage
https://www.engineersgarage.com/basics-of-audio-amplifier-1-9/
Output Power – The power output of an audio amplifier is equivalent to how loud can be sound output from it. It is generally expressed in Watts or Milli Watts. The larger will be the speakers, more output power from the amplifier will be required for them. The maximum output power of an amplifier circuit can be calculated as follow – P = V2/2R
Over-current protection in audio amplifiers - EETimes
https://www.eetimes.com/over-current-protection-in-audio-amplifiers/
The output of the device is a current proportional to the voltage observed between the inputs, where the constant of proportionality is known as the transconductance, G T . The output current can then be put through a resistor in order to give a …
Amplifier current vrs watts; why is current more important?
https://forum.audiogon.com/discussions/amplifier-current-vrs-watts-why-is-current-more-important
100 watts into 8 ohms ---> Voltage is 28V, current is 3.5 amps, transformer 100 VA (~watts) When the speaker dips to 4 ohms, the voltage can only remain constant if the power supply can deliver 7 amps. To do this, the transformer has to be at least 200 VA. Twice as big.
The talk of current amplifier vs voltage in audio ...
https://electronics.stackexchange.com/questions/226401/the-talk-of-current-amplifier-vs-voltage-in-audio
The fact remains that it is impractical, a current output amplifier would apply the maximum voltage it can deliver (it would clip !!!) when no speaker is connected or the speaker's impedance becomes too high. Normal voltage output amplifiers only clip when overloaded when a large signal is applied. This behaviour is much more convenient.
Understanding Amplifier Power - Geoff the Grey Geek
https://geoffthegreygeek.com/understanding-amplifier-power/
Double amplifier power does not double the volume. This article logically shows the relationship between amplifier power, SPL and loudness. It includes a level difference exercise and a gain calculator. Understanding Audio.
a dream...real audio current amplifier.... | diyAudio
https://www.diyaudio.com/community/threads/a-dream-real-audio-current-amplifier.111106/
But a current amplifier has an infinite output impedence (example 10-20 kohm) so is it impossible that the voice coil generate Electro Magnetic Feedback into the amplifier (introducing distortions and phase changes) The Chain is ...open..from 20 hz (when the voice coil impedence is low) to 20 khz (when the voice coil impedence is high)....
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