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First, you will need to setup the small-signal model of the circuit. Then, you determine the impedance looking inside the collector of Q3. The result will be: 0.5*beta*r_o3.
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Thank you for this step by step explanation. First class a great help, seems obvious now. Great teaching!
Great to know that you liked the video! Thanks for your nice comment!
How is the output impedance actually calculated in this case?
First, you will need to setup the small-signal model of the circuit. Then, you determine the impedance looking inside the collector of Q3. The result will be: 0.5*beta*r_o3.