3) Consider the BJT differential amplifier shown in page 17 of the notes. If the RC resistors are replaced with simple pnp current sources (i,e, ones that use only one BJT) sketch the circuit and show its differential half circuit. If VA = 10 V for all transistors calculate the differential voltage gain. Vcc RC Rc

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Differential amplifier

There are two amplifying stages with common degeneration in a differential amplifier.