1 ECE2280 Homework #7 Spring 2009 1. For the circuit on the right, use Vtp=-1V, I=2mA, λ=0 and VSG=VSD=3V. (a) Find V3 and V4. (b) How large a resistor can be inserted in series with each drain connection while maintaining it in saturation? 2. For the circuit on the left, use Vtp=-2V, k’(W/L) = 1mA/V2 and λ=0. Find V4- V7. How large a resistor can be inserted in series with each drain connection while maintaining it in saturation? (a) Find V4-V7. (b) Replace the current source with a resistor. Select a resistor value to yield a current as close to that of the current source as possible. (ie replace the current source with a resistor that still gives 2mA current through the transistor). 3.(worth 2 problems) Use |VBE|=0.7, β=100. Find IB, IC, IE, VB, VC, VE. (a) (b) (c) (d) 500Ω 100Ω 50Ω 1kΩ (b) (a) (a) (b) (b)2 4. For the circuit on the right. Use |VBE|=0.7, β=100, VT=25mV. Find IB4, IC4, IE4, VB4, VC4, VE4. 5.(worth 2 problems) Use |VBE|=0.7, β=100, VT=25mV. Find IB1, IB2, IB3, IC3, IE3, VB1, VC1, VB2, VB3, VE3. Vs is an AC source. 6. For the circuit below. Use |VBE| = 0.7V and β = 50. Find: (a) Current through emitter (b) Current through collector (c) VE, VC, VB. 500+10V1K50K +10V 1k -10V +5V -9V +3V +9V 10k 100 VE VC
View Full Document