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amplifier & radio equipment (3651-ar)

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amplifier & radio equipment (3651-ar)

overview of amplifier & radio equipment (3651-ar)

— an amplifier is an electronic device that can increase the power of a signal. it does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. in this sense, an amplifier modulates the output of the power supply to make the output signal stronger than the input signal. an amplifier is effectively the opposite of an attenuator: while an amplifier provides gain, an attenuator provides loss. an amplifier can either be a separate piece of equipment or an electrical circuit within another device. the ability to amplify is fundamental to modern electronics, and amplifiers are widely used in almost all electronic equipment. the types of amplifiers can be categorized in different ways. one is by the frequency of the electronic signal being amplified; audio amplifiers amplify signals in the audio (sound) range of less than 20 khz, rf amplifiers amplify frequencies in the radio frequency range between 20 khz and 300 ghz. another is which quantity, voltage or current is being amplified; amplifiers can be divided into voltage amplifiers, current amplifiers, transconductance amplifiers, and transresistance amplifiers. radio equipment- a two-way radio is a radio that can both transmit and receive (a transceiver), unlike a broadcast receiver which only receives content. a two-way radio (transceiver) allows the operator to have a conversation with other similar radios operating on the same radio frequency (channel).

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