In the circuit of let VCC 5 12 V, R1 5 3.0 kV, R2 5 2.0 kV, and R3 5 1.5 kV. Moreover, let VBE1(on) 5 VEB2(on) 5 0.7 V and VCE1(sat) 5 VEC2(sat) 5 0.1 V, and assume F1 and F2 are so large that we can...

In the circuit of let VCC 5 12 V, R1 5 3.0 kV, R2 5 2.0 kV, and R3 5 1.5 kV. Moreover, let VBE1(on) 5 VEB2(on) 5 0.7 V and VCE1(sat) 5 VEC2(sat) 5 0.1 V, and assume F1 and F2 are so large that we can ignore the base currents and approximate IC > IE (but only in forward active operation!). (a) If V1 5 5 V, fi nd the BJTs’ operating points Q1 5 Q1(IC1, VCE1) and Q2 5 Q2(IC2, VEC2). (b) Repeat if V1 is raised to 8 V. What is the current supplied by V1 in this case?