Amplifier

Amplifier

Any electronic device designed to inrease the volume of sound.

Industry: Consumer electronics

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Amplifier

Global negative feedback

Consumer electronics; Amplifier

Negative feedback that is applied over several amplifier stages, as opposed to local negative feedback, which is applied on one stage only.

Graphic equaliser

Consumer electronics; Amplifier

A device containing multiple philtres with separate, fixed frequency centers, which allows for boosting or cutting particular signal ranges.

Grid leak biassing

Consumer electronics; Amplifier

The small amount of grid current in the tube generates a negative bias voltage across this resistor, which biases the tube to the proper operating point with respect to the cathode, which is ...

A very large resistor from the grid of a tube to ground, which is used to generate the bias voltage for the tube. See "grid leak biasing" for an explanation of how this works. This term is sometimes ...

Grid resistor

Consumer electronics; Amplifier

The term usually given to a series resistor connected to the grid of a tube, also called a "grid stopper", but sometimes used to refer to the resistor connected from the grid of a tube to ground, ...

Grid stopper

Consumer electronics; Amplifier

A resistor connected in series with the grid of a tube, usually right at the pin of the tube. It is used to prevent parasitic oscillations and reduce the chance of radio station interference by ...

Ground switch

Consumer electronics; Amplifier

Also referred to as a reverse or polarity switch, this feature allows the polarity of a current to be conveniently reversed, resulting in the elimination of hum.