1 (687)

Prévia do material em texto

Step 1 of 3 6.021E Refer to Figure 6.21 in the text book for the circuit. Determine the base current of the transistor. Substitute 1.7 V for , 0.7 V for and 10 kΩ for Determine the collector current. The collector to emitter voltage is, Substitute 10 V for for Rc and 5 mA for =5V For the transistor to operate in active region, the collector to emitter voltage should be greater than the base to emitter voltage. As > the transistor is operating in the active mode. Step 2 of 3 (a) For operation at the edge of saturation, the collector to emitter voltage must be = 0.3 V. Determine the required collector resistance at the edge of saturation. 10-0.3 = = 5x10⁻³ Thus the value to which collector resistance should be increased is Step 3 of 3 (b) The common-emitter current gain is, For operation deep in saturation, the collector to emitter voltage is The collector current is, =10x0.1m Determine the collector resistance. 10-0.2 = 9.8 = Thus the value to which the collector resistance should be increased for operation deep in saturation is