AMPLIFIER ckt help pls

Status
Not open for further replies.
W

wakoko79

New Member
guys, i need help..

i have a project in school which needs me to make a class AB power amps.

i used this circuit. in simulation, its flawless, but in practice.. its distorted..

i find that if i increase r13 or r14, more distortions appear, how can i enhance this design? pls help me >.<

any suggestions for other designs of class ab amps? thanks!!!!
 

Attachments

  • ckt.JPG
    124.8 KB · Views: 150
  • 10012010.jpg
    354 KB · Views: 135
Sorry, but that's a REALLY poor attempt at an amplifer - the output stage is really bad, and the lack of negative feedback means it will be distorted.
 
what i dont understand is why there is distortion on top of the waveform. more to the point, the distortions in the upper portion is not the same as the bottom.

of course i already did a google search before going here... pls help >.<
 
wakoko79 said:
what i dont understand is why there is distortion on top of the waveform. more to the point, the distortions in the upper portion is not the same as the bottom.

of course i already did a google search before going here... pls help >.<
Click to expand...

Because it's a completely rubbish circuit, here's about the minimum you need:

**broken link removed**
 
yah.. i understand it is rubish.. i guess i wasnt around when it was taught... any links to good feedback mechanics/tutorial for bjt's?

i tried to study the slides given in the course but.. they're rubbish too..
 
Status
Not open for further replies.

Similar threads

S
  • Question
Amplifier shutting down
Replies
19
Views
3K
Nigel Goodwin
S
  • Question
Amplifier aux switch
Replies
11
Views
2K
S-fr
S
S
  • Question
Amplifier ic change
Replies
1
Views
838
Tony Stewart
S
  • Question
D1047 amplifier
Replies
15
Views
2K
ZipZapOuch
S
  • Question
Tpa3116d2 Amplifier not working properly
Replies
6
Views
951
Tony Stewart
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…