Derive the output impedance of the simple bipolar current mirror shown in Fig. P8.9. Take the finite output impedance, , into account for both transistors. What is the required value for , and what is...

Derive the output impedance of the simple bipolar current mirror shown in Fig. P8.9. Take the finite output impedance, , into account for both transistors. What is the required value for , and what is the output impedance if we want the transistors to be biased at ?