5 Small-signal equivalent circuits - amplifiers

Exercise 5.1 An amplifier with 2 outputs
Exercise 5.2 A weird degenerated amplifier with an NPN
Exercise 5.3 A common-collector amplifier
Exercise 5.4 A common gate amplifier
Exercise 5.5 A common-base and a common emitter amplifier
Exercise 5.6 A common-gate amplifier and a something else
Exercise 5.7 An amplfier using a single NPN
Exercise 5.8 An amplifier with 2 NPNs
Exercise 5.9 An NPN amplifier driven from a voltage source
Exercise 5.10 An NPN amplifier driven from a current source
Exercise 5.11 An NPN amplifier