November 23, 2023

7 Different Types of Amplifiers with their Functions

Amplifiers are electronic devices which have the ability to make a sound signal more powerful. The purpose of doing this is to increase the volume and intensity of the sound by the time it reaches the speakers. Amplifiers are used in many locations, such as cars, concerts, outdoor events, and so on.

You might not realize this, but amplifiers already exist in several types of electronic devices. Your flat screen television and smartphone both have amplifiers in them. There are several different types of amplifiers available. Some are smaller than others, but they all serve the same overall purpose.

7 Different Types

However, you need to choose the right amplifier for your particular needs. If you choose the wrong amplifier, then you may not get the sound quality that you were hoping for. That is why you must learn about the different types of amplifiers and their specific functions. Then you can make an educated decision as to which amplifier is better for your needs.

Below are the top 7 amplifiers and their functions.

1) Audio Voltage Amplifiers

Audio voltage amplifiers are commonly used to strengthen the lower level sound signals that come from disks and microphones. They may even correct the tone, mix multiple inputs, and equalize the levels of the signals. Since audio frequency amplifiers can have a high output resistance and high voltage gain, they are able to deliver enough sound power through loudspeakers.

2) Radio Frequency Amplifiers

Tuned circuit equipment is required to manage the frequency of a radio frequency amplifier. Depending on what you need the amplifier for, the circuit equipment might be adjustable and the bandwidth might be either narrow or wide. Radio frequency amplifiers have low input resistance as well.

3) Intermediate Frequency Amplifiers

It is common for radar devices, radio devices, and television sets to have intermediate frequency amplifiers in them. When these tuned amplifiers receive a radar signal or television signal, they amplify most of the signal’s voltage. After that, the signal transfers the video and/or audio content to the speakers built into these devices.

Intermediate frequency amplifiers have an “intermediate frequency” because their frequency is smaller than the radio waves that are received and larger than the video signals and/or audio signals generated.

4) DC Amplifiers

If you have an electronic device that produces extremely low frequency signals or a DC voltage of 0 hertz, then you’ll want to have a DC amplifier in order to amplify the signal and voltage.

Certain types of electrical measuring instruments and control systems have low frequency signals like these. Because of this, DC amplifiers are used with these types of devices.

5) Ultrasonic Amplifiers

Ultrasonic amplifiers work over very narrow frequencies. The ultrasonic range of the frequencies they handle are anywhere from 20 kilohertz to 100 kilohertz. You might see ultrasonic amplifiers used for specializes purposes. Some of which include remote control systems, ultrasound scanning, metal fatigue detection and ultrasonic cleaning.

6) Video Amplifiers 

Video amplifiers are perfect to have for radar systems, television sets, and any type of video system or equipment. The picture data within the video signals of these devices are carried easily by video amplifiers. The DC level of the video signal is preserved the entire time too.

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7) Buffer Amplifiers

Buffer amplifiers are best used as impedance matching devices because they don’t amplify a signal like the other amplifiers do. Instead, the strength of the output signal is the same as the strength of the input signal.

The benefit of a buffer amplifier is to make sure the signal does not lose strength between various circuits of the electronic device. This can happen if there is high output impedance in one circuit and low input impedance in another circuit.

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