Common collector and common emitter

  • Thread starter Thread starter curiousguy23
  • Start date Start date
  • Tags Tags
    Collector
AI Thread Summary
The discussion focuses on building a two-stage amplifier using common collector and common emitter configurations, with a specific concern about achieving a gain of only 1. The user has biased the circuit for midpoint operation but is unsure of the cause of the low gain. The circuit includes an 8-ohm resistor in parallel with the load resistor, which may be affecting performance. Without this resistor, the expected gain should be slightly less than 4. The user is seeking assistance to troubleshoot the issue effectively.
curiousguy23
Messages
9
Reaction score
0
Hi, I am trying to build an amplifier with 2 stages, common collector and common emitter. I biased for midpoint operation in them but i have a gain of only 1, don't know where I am going wrong.


http://yfrog.com/14amplifierunij

Thats the circuit, any help is greatly appreciated
 
Engineering news on Phys.org


R14 is only 8 ohms and this is in parallel with the load resistor R2.

Without it, the gain should be a bit less than 4. ie 800 / 200
 
Thread 'Weird near-field phenomenon I get in my EM simulation'

Thread 'Weird near-field phenomenon I get in my EM simulation'

I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...
View full post »

Thread 'EMF (Electromagnetic Field) & EHS (Electromagnetic Hyper Sensitivity)'

Hello dear reader, a brief introduction: Some 4 years ago someone started developing health related issues, apparently due to exposure to RF & ELF related frequencies and/or fields (Magnetic). This is currently becoming known as EHS. (Electromagnetic hypersensitivity is a claimed sensitivity to electromagnetic fields, to which adverse symptoms are attributed.) She experiences a deep burning sensation throughout her entire body, leaving her in pain and exhausted after a pulse has occurred...
View full post »

Similar threads

BJT common collector Colpitts oscillator
Replies
43
Views
7K
Questions for common emitter, collector and base amplifier.
Replies
2
Views
1K
BJT Collector to Emitter voltage
Replies
2
Views
3K
BJT transistor analysis: common emitter confusion
Replies
5
Views
3K
Pnp transistor with base connected to collector
Replies
5
Views
4K
Heavy Amplifier Circuit Oscillation Happened
Replies
3
Views
2K
How we can physically imagine transistor saturation current?
2
Replies
62
Views
10K
What happens when collector-base voltage is 0 in transistor?
Replies
15
Views
8K
Common Emitter Active Load Problems
Replies
13
Views
6K
Boat autopilot remote (question about transister choice)
Replies
11
Views
2K

Hot Threads

Recent Insights

Back
Top