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Therefore, a transistor transfers a signal from a low resistance to high resistance. The prefix 'trans' means the signal transfer property of the device while ' Bipolar Junction Transistors (BJT). Transistor Basics. • A Bipolar Junction Transistor is a three layer (npn or pnp) semiconductor device. For “pnp transistor” collector receives electrons to its junction. 3) Base: The middle section which forms two pn junction between emitter and collector is.In its essence, a transistor consists of two diodes arranged back to back: Transistors can be either n-p-n or p-n-p. The configuration shown above is called an The junction transistor generates less noise, handles more power, provides higher current and voltage gains, and can be massYproduced more cheaply than the Explain operation of pnp and npn transistors. Sketch the common-base, common-emitter and common-collector characteristics. Compare the different transistor Bipolar Transistors are current regulating devices that control the amount of current flowing through them in proportion to the amount of biasing voltage