20 Facts About Electronic amplifier

An amplifier, electronic amplifier or amp is an electronic device that can increase the power of a signal .

The amount of amplification provided by an Electronic amplifier is measured by its gain: the ratio of output voltage, current, or power to input.

An Electronic amplifier is a circuit that has a power gain greater than one.

In principle, an Electronic amplifier is an electrical two-port network that produces a signal at the output port that is a replica of the signal applied to the input port, but increased in magnitude.

Every Electronic amplifier includes at least one active device, such as a vacuum tube or transistor.

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Large amounts of negative feedback can reduce errors to the point that the response of the Electronic amplifier itself becomes almost irrelevant as long as it has a large gain, and the output performance of the system is defined entirely by the components in the feedback loop.

The gain of the Electronic amplifier is determined by the properties of the transistor itself as well as the circuit it is contained within.

Power Electronic amplifier is an Electronic amplifier designed primarily to increase the power available to a load.

An operational Electronic amplifier is an Electronic amplifier circuit which typically has very high open loop gain and differential inputs.

Fully differential Electronic amplifier is similar to the operational Electronic amplifier, but has differential outputs.

The input impedance of a unilateral Electronic amplifier is independent of load, and output impedance is independent of signal source impedance.

An Electronic amplifier that uses feedback to connect part of the output back to the input is a bilateral Electronic amplifier.

An 'inverting' Electronic amplifier produces an output 180 degrees out of phase with the input signal .

An emitter follower is a type of non-inverting Electronic amplifier, indicating that the signal at the emitter of a transistor is following the input signal.

Power Electronic amplifier circuits are classified as A, B, AB and C for analog designs—and class D and E for switching designs.

The power Electronic amplifier classes are based on the proportion of each input cycle during which an amplifying device passes current.

Practical Electronic amplifier circuit shown above could be the basis for a moderate-power audio Electronic amplifier.

Negative feedback into the difference Electronic amplifier allows the Electronic amplifier to compare the input to the actual output.

Any real Electronic amplifier is an imperfect realization of an ideal Electronic amplifier.

An important limitation of a real Electronic amplifier is that the output it generates is ultimately limited by the power available from the power supply.