A section of a differential amplifier stage which uses NPN BJTs is shown in Figu

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A section of a differential amplifier stage which uses NPN BJTs is shown in Figure 341. Both sides of this stage are evenly matched so that there are no d.c. offset effects. As was discussed in a class handout, the emitter resistor REE. is used to decrease the effective transconductance g and to increase the differential input impedance Z . For this configuration, calculate values for the transistor current gain beta r, the emitter bias currents I and I and the emitter resists RE necessary to realize the following amplifier properties: IB = 3.0 mu (input bias current) To save you some time, you may find the following equations useful: You may assume that both transistor emission coefficients arc unity and that the thermal voltage Vt is 26mV. Show all of your work, and explain in detail any and all assumptions you make. Differential BIT Amplifier Section

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