Definition of amplifier in English:



  • 1An electronic device for increasing the amplitude of electrical signals, used chiefly in sound reproduction.

    • ‘The combined result is increased profitability, regardless of whether the company makes aspirin or amplifiers.’
    • ‘The auxiliary amplifier is provided within the circuit to increase the gain of the cascode amplifier and has an associated output.’
    • ‘Linear amplifiers are much less efficient but pass complex transmission signals with minimum distortion, thus preserving spectral utilization.’
    • ‘The function generators feed into an integrator to combine the waveforms before it went to an amplifier and then was split to go to the electrodes.’
    • ‘We have demonstrated a variety of devices and functions, including single mode and ring lasers, high-speed and monitoring detectors, modulators, amplifiers, and passive waveguides.’
    • ‘Adding amplifiers and oscillators, of course, increases the complexity of the systems as well as the cost.’
    • ‘He adds that the company is building other components, including a range of radio-frequency and intermediate-frequency amplifiers in order to provide a complete system-level solution for set-tops.’
    • ‘Thermal noise typically originates in the amplifiers.’
    • ‘Circumstances changed dramatically in about 1925 when the new microphones and triode valve amplifiers introduced a few years earlier for radio broadcasting came into use.’
    • ‘This makes it suitable for audio applications, including audio amplifiers and preamplifiers, home entertainment system, mixing desks and audio recording equipment.’
    • ‘In addition, he says, transmission amplifiers can be located at substations which are already secure and equipped with low-voltage power.’
    • ‘The receiver front end - including the antenna, RF integrated circuits, low noise amplifiers, and filters - are still driven by hardware design and production costs.’
    • ‘An amplifier and a sampler convert the storage medium signal into a timed sample sequence.’
    • ‘The apparatus includes two visual indicators, two amplifiers, and a logic circuit.’
    • ‘Hearing aids are electronic devices made up of a microphone, an amplifier, a loudspeaker and a battery.’
    • ‘The differential amplifier further includes a lateral bipolar transistor.’
    • ‘The book is a practical reference for professionals who create amplifiers suitable for linear transmitters.’
    • ‘The aim of the invention is to process higher maximum levels of the source signal and to suppress noises of the second amplifier.’
    1. 1.1A device consisting of an amplifier combined with a loudspeaker, used to amplify electric guitars and other musical instruments.
      • ‘She disappeared from a moment, then returned dragging a heavy amplifier, with a full-scale bass tucked under her arm.’
      • ‘Sometimes the surround sound processor and the amplifier are combined into a surround sound receiver, to save you a little bit of money.’
      • ‘With the drum cracks, cymbal hits, and nearby guitar and bass amplifiers, my musical career a decade ago was sort of like working in a rifle range.’
      • ‘They walk down in the rain to get close enough to hear me sing without the amplifier.’
      • ‘Equipped with amplifiers and speakers, protesters sang, danced and conducted street drama at the entrance of the park…’
      • ‘Ty plugged his electric guitar into the amplifier on the stage.’
      • ‘I've been in bands before where they spend so much time rehearsing and carrying amplifiers around that they haven't actually achieved anything.’
      • ‘People didn't intend amplifiers to distort and now we can't imagine a guitar without distortion.’
      • ‘Previously, only guitars and amplifiers (with the auxiliary keyboards and drums) possessed such accessibility.’
      • ‘The walls are throbbing gently to the beat of music coming from one near and several more distant amplifiers.’
      • ‘This time, she sang unaccompanied: no cousins, no amplifiers, no disco beat.’
      • ‘I've got a good sound and I usually have an amplifier and microphone.’
      • ‘But before the party even got started, Essex Police officers turned up and removed music amplifiers so it could not go ahead at all.’
      • ‘In common with most of the shacks, they also sell turntables, amplifiers and speakers for about Rp 200,000 each depending on the make, etc.’
      • ‘I mean, I only have to look at an amplifier or an effects pedal and it blows up.’
      • ‘You'd think that rock musicians would have worse hearing loss, but their amplifiers are typically pointed towards the audience, and they aren't playing directly into each other's ears.’
      • ‘He liked the way the amplifier and the turntable and the speakers were all separate, and the archaic brittleness of the grey cables that connected them all.’
      • ‘If you like to listen to strong, bass-heavy music, you should get powerful amplifiers and ample subwoofers.’
      • ‘They would also limit the number of music events that use amplifiers.’
      • ‘Each strum of the guitar trembles through the amplifier to turn feedback into magic.’