Transistors As Amplifier

Item Code: SJ253

Principle and Working:

Common emitter amplifier:
The voltage gain of a CE amplifier varies with signal frequency. It is because the reactance of the capacitors in the circuit changes with signal frequency and hence affects the output voltage. The curve drawn between voltage gain and the signal frequency of an amplifier is known as frequency response.
RC coupled amplifier : A resistance capacitance coupled amplifier is basically a multi-stage amplifier are circuit extensively used in electronic circuits. It offers a constant gain over a wide frequency band.
... Differential amplifier: It is a fundamental electronic circuit that amplifies the difference between two input signals while rejecting any common-mode signal. It is commonly used in operational amplifiers etc.
Vout = R₃ (V₂–V₁)/R₁

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