transistor as an amplifier download free

The other wire for this signal is connected to the ground. The input is a sinusoidal voltage with a peak-to-peak value of 2 V introduced at point K, which is connected to the transistor base through a 470 kΩ resistor. We study the variation of the voltage across the load and compare it with the input voltage.įigure 1 Example of voltage amplification by a transistor.

In other words, if a sinusoidal signal is introduced as the input of a transistor, the transistor output is a similar signal (having the same form and frequency) with a higher voltage. The circuit in Figure 1 illustrates a simple example of how the voltage of a simple sinusoidal signal can be amplified. Similarly, a weak signal picked up by a sensor in many industrial applications, is amplified before it can be used for further processing. It must be amplified by hundreds of times in order to be audible through a loudspeaker. For instance, a very weak electromagnetic signal received by the antenna of a radio has little voltage and cannot cause any significant current in a circuit. When putting together, a number of transistors can serve as a power amplifier (amplifying both voltage and current).

Transistor as an amplifier download free