audio amplifiers - how do they work?
The audio amplifier is one of the most critical components in a sound system or speaker unit, as it has the main function of sound amplification.
These amplifiers simply receive low-frequency signals (
In the range of 20Hz to 20,000Hz)
And convert it to a high frequency signal.
Basically, these amplifiers are conceptually complete with the simple task of converting hundreds of megawatts of input signals into several gigawatts of signals.
Technically, these amplifiers are designed according to indicators of frequency response, gain response, noise and distortion.
Of all these factors, the gain factor is probably the most important factor.
The gain factor is slightly increased, and the noise and distortion levels in the amplifier increase significantly.
On the other hand, reducing feedback can ensure that the gain and distortion levels also drop.
All of this is done in class AB amplifiers, a class of linear amplifiers.
The first audio amplifier was invented by Lee DeForest in 1909.
The first amplifier used a three-pole vacuum amplifier, which further led to the birth of the AM radio.
The introduction of new era audio devices like CD and DVD players has led to pre-
Amplification, which is the necessary stage for audio signal amplification in the past.
This is because the CD and DVD players generate flat signals.
TIM, also known as transient intermodulation distortion, was found to be a problem related to the operation of the audio amplifier.
High quality modern amplification system works on open loop response frequency of 20 KHZ.
This eliminates the possibility of a TIM effect in an amplifier.
Still, some inferior speakers and amplifiers still have traces of the TIM effect.
The result of the audio amplifier is the high frequency sound signal, which is very different from the low frequency sound signal provided to the amplifier unit as input.
The amplifier itself involves many complex circuits, not to mention the science of making the amplifier work.
Telecom engineers around the world must be praised, although they have and are doing the work in this space to show the noise-free and distortion-free amplification units.