- 1 (57.68 KiB) Viewed 34 times
RB ww 10 ΚΩ Section 5-3 Vcc +5 V Rc - 1.0 ΚΩ RE · 2.2 ΚΩ -5 V VEE Other Bias Methods 21. Analyze the circuit in Figure 5-39 to determine the correct voltages at the transistor terminals with respect to ground. Assume PDC = 100. 22. To what value can RE in Figure 5-39 be reduced without the transistor going into saturation? 23. Taking VBE into account in Figure 5-39, how much will IE change with a temperature increase from 25°C to 100°C? The VBE is 0.7 V at 25°C and decreases 2.5 mV per degree Celsius. Neglect any change in BDc. 24. When can the effect of a change in Bpc be neglected in the emitter bias circuit? 25. Determine Ic and VCE in the pnp emitter bias circuit of Figure 5-40. Assume Ppc = 100. 26. Determine VB, VC, and Ic in Figure 5-41. VEE 10 Y