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2. Low-noise amplifier - Wikipedia

   en.wikipedia.org/wiki/Low-noise_amplifier

   A low-noise amplifier (LNA) is an electronic component that amplifies a very low-power signal without significantly degrading its signal-to-noise ratio (SNR). Any electronic amplifier will increase the power of both the signal and the noise present at its input, but the amplifier will also introduce some additional noise.

3. Variable-gain amplifier - Wikipedia

   en.wikipedia.org/wiki/Variable-gain_amplifier

   A variable-gain (VGA) or voltage-controlled amplifier (VCA) is an electronic amplifier that varies its gain depending on a control voltage (often abbreviated CV). VCAs have many applications, including audio level compression , synthesizers and amplitude modulation .

4. Parametric oscillator - Wikipedia

   en.wikipedia.org/wiki/Parametric_oscillator

   In 1948 Aldert van der Ziel pointed out a major advantage of the parametric amplifier: because it used a variable reactance instead of a resistance for amplification it had inherently low noise. [13] A parametric amplifier used as the front end of a radio receiver could amplify a weak signal while introducing very little noise.

5. Category:Electronic amplifiers - Wikipedia

   en.wikipedia.org/wiki/Category:Electronic_amplifiers

   Lock-in amplifier; Log amplifier; Low-noise amplifier; M. Magnetic amplifier; Metadyne; Multistage amplifier; N. NE5532; ... Variable-gain amplifier This page was ...

6. Instrumentation amplifier - Wikipedia

   en.wikipedia.org/wiki/Instrumentation_amplifier

   Additional characteristics include very low DC offset, low drift, low noise, very high open-loop gain, very high common-mode rejection ratio, and very high input impedances. Instrumentation amplifiers are used where great accuracy and stability of the circuit both short- and long-term are required.

7. Transimpedance amplifier - Wikipedia

   en.wikipedia.org/wiki/Transimpedance_amplifier

   For a good noise performance, a high feedback resistance should thus be used. However, a larger feedback resistance increases the output voltage swing, and consequently a higher gain from the operational amplifier is needed, demanding an operational amplifier with a high gain-bandwidth product. The feedback resistance and therefore the ...