Amplifier Features

An amplifier is actually any device or equipment that increases or strengthens a small amount of energy to a larger amount. However, the notion of amplifiers lean more towards audio equipment.

The science of amplifiers consists of a number of parameters. These are as follows. Gain is the measure of output power over input power measured in decibels. Another is output dynamic range. It is the range between the smallest and largest useful output levels. Another parameter of amplifiers is the variation amid the lower and upper half power points which is called the bandwidth. When the amplifier is driven by a step input, the instance in use for the output to adjust from ten to ninety percent of its final level is what we call the rise time.

Next is the settling time and aberrations. This refers to the time it takes for output to stay put within a certain percentage of the final value. Slew rate is the highest rate of voltage change of the amplifier measured in volts per second or microsecond. Another is noise which measures how much noise is present during the amplification process. It is what audiophiles don’t want from their audio system but will always be a part electronic devices and components.

Efficiency is another parameter that calculates how much voltage input is applied to the amplifier's output. It restricts the amplifier’s total power with what it can only handle. Last is the linearity. The more linear your amp is, the less distortion it produces.

Enough of the technical and learn about other amplifier features. Amplifiers have different classes: Class A, B, AB, C, and D. Amplifiers are usually categorized by or angle of flow of the input signal all the way to the amplifying device such as your speakers or your head unit. Class A amplifier features more linear, less complicated design but is very inefficient like driving headphones. The Class B amplifier features two or more output devices that interchange in 180 degrees conduction of input signal. The Class AB amps reconcile the amplifier features of class A and B. This amplifier features improved small signal output linearity and conduction angles from 180 degrees upwards. These types of amplifiers are usually found in cell phones, cell towers, and TV transmitters. Class C amplifier features conduction that is less than the usual 180 degrees with efficiency higher than all of the other classes. It is the most popular class when it comes to high powered RF amps.