Hi:
I am looking at a simple CE amplifier. With no emitter resistor bypass capacitor the
voltage gain is Av = rc / r'e + re = 286Ω / (2.57Ω + 100Ω) =2.78 which agrees to the
Spice sim.
However, if I fully bypass the emitter resistor the gain (based on the output voltage)
is like 74. If I calculate the gain it is Av = rc / r'e = 286Ω / 2.57Ω = 111.
I must be missing a piece of the puzzle.
Thanks
John
I am looking at a simple CE amplifier. With no emitter resistor bypass capacitor the
voltage gain is Av = rc / r'e + re = 286Ω / (2.57Ω + 100Ω) =2.78 which agrees to the
Spice sim.
However, if I fully bypass the emitter resistor the gain (based on the output voltage)
is like 74. If I calculate the gain it is Av = rc / r'e = 286Ω / 2.57Ω = 111.
I must be missing a piece of the puzzle.
Thanks
John
Attachments
-
1.9 KB Views: 17