phasor diagram. We could draw phasor diagrams corresponding to
Figs 12.12 and 12.156 but they will be clearer if they are referred to
the actual transistor circuits, as in Fig. 12.16. (Helpful though
Fig. 12.16 Basic transistor amplifier circuits and their phasor diagrams: (a) common-
emitter: (b) common-collector. Note that the phasor diagrams themselves are
identical
equivalent circuits are as a logical basis for calculations, we must
never become so at-home in their world of make-believe that we
forget that they are not real circuits, any more than the algebraical
symbols. ...
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