Amplifiers

Amplifiers

An electronic amplifier is used for increasing 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.

About Amplifiers

An electronic amplifier is used for increasing 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 may be considered as modulating the output of the power supply. The term amplifier is applied to anything from a circuit (or stage) using a single active device to a complete system such as a packaged audio hi-fi amplifier. Amplifiers can be specified according to their input and output properties. They have some kind of gain, or multiplication factor relating the magnitude of the output signal to the input signal. The gain may be specified as the ratio of output voltage to input voltage (voltage gain), output power to input power (power gain), or some combination of current, voltage and power.

Contributions by Light current, Omegatron, and GRAHAMUK.

New Questions for Amplifiers

See All Questions