8.20 Using the topology of Fig. 8.4, design a single- input, single-output BJT amplifier with a gain of -150. Choose values for Vcc, VEE, Ic, and Rc. Can you suggest a simple modification to the circuit that will yield a positive gain of +150? Section 8.3BJT Differential Amplifier Vcc Figure 8.4 Simple differential amplifier made from bipolar junction transistors is fed from a single voltage signal source v Rc Rc O VOUT UIN 01 UBEL UBE2 «O VEE

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BJT (Bipolar Junction Transistor)

A BJT is a semiconductor device with 3 terminals that consist of a p-n junction diode that can amplify the signal or current. It is a current-controlled device. The three BJT terminals are base, collector, and emitter. The BJT works with the charge carrier, the two type of carriers in the BJT are holes and electrons, the charge carriers flow by the process of recombination. The signal to be amplifier is generally given as the input at the base terminal and an amplified form of it is available at the collector terminal.