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Chapter III : Transistors : Bias Resistor Built-in Transistors (BRTs)

BRTs are bias resistor built-in transistors. BJTs are often used together with resistors in electronic equipment. The mounting area can be reduced by using BRTs, which integrate a transistor and a resistor.

Application example of BJT / Equivalent circuit of BRT

Fig. 3-2(a) Application example of BJT

Fig. 3-2(b) Equivalent circuit of BRT

Why BJT needs resistance in its base circuit
Fig. 3-2(c) Why BJT needs resistance in its base circuit

Chapter III : Transistors

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