As the name suggests, it amplifies a small signal. It ususally has a very high input impedance, to avoid affecting the source signal.
1.Small signal amplifier can be designed easily using s parameter while large signal amplifier not.
amplifier will strengthen da small input signal n amplifies it
An amplifier amplifies the small input signal to a high signal without changing its freqency.
an amplifier.
An amplifier.
Small signal amplifier is needed because it is used for amplifying input signals having low frequency or amplitude.
Small signal amplifiers are generally referred to as "Voltage" amplifiers as they convert a small input voltage into a much larger output voltage.
The amplifier is supposed to be an electronic circuit. Electronic circuits are nonlinear circuits, which may be modeled in the time domain by means of nonlinear differential equations and nonlinear algebraic equations. The kernel of the solution of the nonlinear equations is the solution of a linear equation system i.e. the nonlinear components and couplings are approximated with linear relations valid for small signals. Iterations are performed until the laws of Kirchhoff are fulfilled. The instant set of linear equations is the small signal model for the amplifier. If the amplifier is excited with a dc power source it assumes an active state called the bias point or quiescent point. If the relation between the input and the output signals of the amplifier is measured to be (almost) linear in the bias point then we assume a small signal amplifier with time independent bias point else we assume a large signal amplifier.
You will have signal degradation unless you use the amplifier.
I think Amplifier is use for direct signal or D.C signal & the main function of amplifier is to make that signal sharp(powerful) so that a microprocesser process it.
to amplify a small signal to sufficient level,so that it can travel to a large distance from first stage till the last stage
Amplifiers are electronic device that responds to a small input signal (voltage, current, or power) and delivers a larger output signal.