This type of connection offers two types of transistors. Three terminals are drawn out of the three semiconductor materials present in it. The Transistor is a three terminal solid state device which is formed by connecting two diodes back to back. It also regulates the incoming current and voltage of the signals. A transistor also acts as a switch to choose between available options. Amplification is needed wherever the signal strength has to be increased. Amplification means increasing the signal strength. Now if this signal is read as it is, you cannot get a fair output. The received signal will obviously be weak due to the disturbances it would face during its journey. Suppose that you have a FM receiver which grabs the signal you want. A Transistor is a three terminal semiconductor device that regulates current or voltage flow and acts as a switch or gate for signals. After having a good knowledge on the working of the diode, which is a single PN junction, let us try to connect two PN junctions which make a new component called Transistor.
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