Bipolar Junction Transistors (BJT)

Q1: Often a common-collector will be the last stage before the load; the main function(s) of this stage is to:

A provide voltage gain

B provide phase inversion

C provide a high-frequency path to improve the frequency response

D buffer the voltage amplifiers from the low-resistance load and provide impedance matching for maximum power transfer

ANS:D - buffer the voltage amplifiers from the low-resistance load and provide impedance matching for maximum power transfer

The low output impedance allows a source with a large output impedance to drive a small load impedance; it functions as a voltage buffer.



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