modified 10 years ago

Emitter Follower Voltage Gain

01:21:35

There's something the books don't teach you. In every textbook you'll see that the emitter follower aka common collector topologies have a voltage gain of less than 1. Well by neutralizing some of the emitter degeneration negative feedback we can have some voltage gain. Now the voltage gain is set to 3.5, and it's highly dependent on the 3.3k resistor and the voltage divider at the emitter. The higher the 3.3k resistor the more gain. The lower the 180ohm resistor the more gain and the higher the 560ohm resistor the more gain. 

published 10 years ago

jason9

10 years ago

Cool

jason9

10 years ago

A guy whose username is @kaivanveldhoven recently made a few op-amp circuits. What class is the simpler of the two op-amp designs?

thebugger

10 years ago

If it is a single op amp circuit it's most likely in class A. The output is a tell tale sign

Nikolay_S

10 years ago

Very interesting! Never thought about it.

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