circuit shown in Fig. P6.42, current source VBE At 25°C with ß = 100, what currents flow in R| and R2? What voltage would you expect at node E? Noting that the temperature coefficient of vgg for Ig constant is –2 mV/°C, what is the TC of vg? For an ambient temperature of 75°C, what voltage would you expect at node E? Clearly state any simplifying assumptions you make. 68 kN R, 6.8 kf OE

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*6.42 In the circuit shown in Fig. P6.42, current source / is 1.1 mA, and at 25°C vBE = 680 mV at ig =1 mA. At
25°C with B = 100, what currents flow in RỊ and R2? What voltage would you expect at node E? Noting that the
temperature coefficient of vgg for Ig constant is –2 mV/°C, what is the TC of vg? For an ambient temperature of
75°C, what voltage would you expect at node E? Clearly state any simplifying assumptions you make.
R2
68 kn
R,
6.8 kf
어
Figure P6.42
Transcribed Image Text:*6.42 In the circuit shown in Fig. P6.42, current source / is 1.1 mA, and at 25°C vBE = 680 mV at ig =1 mA. At 25°C with B = 100, what currents flow in RỊ and R2? What voltage would you expect at node E? Noting that the temperature coefficient of vgg for Ig constant is –2 mV/°C, what is the TC of vg? For an ambient temperature of 75°C, what voltage would you expect at node E? Clearly state any simplifying assumptions you make. R2 68 kn R, 6.8 kf 어 Figure P6.42
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