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Unformatted text preview: E , and V C . b) If R B is raised to 270 k , what voltages result? c) With R B = 270k , what value of would return the voltages of the values first calculated? Fig. 2 4- A designer wishes to create a BJT amplifier with g m of 50mA/V and a base input resistance (r ) of 2000 or more. a) What collector-bias current should be chosen? b) What is the minimum that can be tolerated to be used for the transistor? 5- In the circuit of Fig.3, V C = 2V. If V CC = 5V, R C = 3 k , and a signal v be = 0.005sin t volts is applied: a) Find the expressions for the total instantaneous quantities i C (t), v C (t), and i B (t). The transistor has = 100. b) What is the voltage gain? Fig.3 6- Bonus Question : write a one page comprehensive and efficient summary about what you studied in the diode lectures. The more the summary is complete, the higher will be the mark. Due date: October 25, 2007. Late submission will not be accepted....
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- Spring '11