low-noise preamplifier

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• Preamplifier — Preamp redirects here. For the device used in professional audio, see Microphone preamplifier. An example of a typical high end stereo preamplifier. A preamplifier (preamp) is an electronic amplifier that prepares a small electrical signal for… …   Wikipedia

• Noise temperature — In electronics, noise temperature is one way of expressing the level of available noise power introduced by a component or source. The power spectral density of the noise is expressed in terms of the temperature (in kelvins) that would produce… …   Wikipedia

• Preamplifier — F/A/V An electronic device that boosts extremely weak signal voltages, such as those from microphones or mag heads, to a level that is usable by power amplifiers. (Electronics) A&V An amplifier that raises the gain of a low level signal so that… …   Audio and video glossary

• Microphone preamplifier — A microphone preamplifier is a sound engineering device that prepares a microphone signal to be processed by other equipment. Microphone signals are normally too weak to be transmitted to units such as mixing consoles and recording… …   Wikipedia

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• Optical amplifier — An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from… …   Wikipedia

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• Amplifier — For other uses, see Amplifier (disambiguation). Generally, an amplifier or simply amp, is a device for increasing the power of a signal. In popular use, the term usually describes an electronic amplifier, in which the input signal is usually a… …   Wikipedia