Transistor Amplifiers Small Signal Amplifiers. The transistor amplifier is non-linear and an incorrect bias setting will produce large amounts of distortion to the output waveform. Too large an input signal will produce large amounts of distortion due to clipping, which is also a form of amplitude distortion.
Transistor Amplifiers Darlington Transistor as Amplifier. In case of power or voltage amplifiers the load resistance at the output is very low to have high current flow. This current flows through the collector terminal of a transistor if transistor is used for amplification. To be capable to suit for power amplifiers, transistors must drive high load currents.
Transistor Amplifiers Voltage amplifiers, many times, are built with op amp circuits. However, with a transistor and the correct biasing, we can produce the same voltage amplification effect of an op amp circuit. Therefore, in this case, a voltage amplifier is built with all simple, discrete components.
Transistor Amplifiers The common emitter transistor amplifier is the only configuration that gives an inversion, 180°, between the input and output signals. The reason for this can be seen from the fact that as the input voltage rises, so the current increases through the base circuit.