4
\$\begingroup\$

I hope that this is the right place to ask this question. English isn't my first language. So here is my question. If you are familiar with analog circuits you know about power amplifier. Here is simple schematic.

schematic
(source: gpstronic.com)

So there are 2 steps in the power amplifier the first one amplifies the voltage(U) and the second one the current(I). Whats the name of the second step. In my language we call this final step with/without transformer but when I search for this in WWW I don't find anything. I will be very grateful if somebody answer to my question.

\$\endgroup\$
  • 2
    \$\begingroup\$ When you refer to it as "final step", I'd be tempted to say "output stage" or "power stage". But I'm not native English either. \$\endgroup\$ – jippie May 11 '14 at 7:56
1
\$\begingroup\$

I could be way off here but T2 & T3 seem to form a class AB amplifier and together with T4 & T5 you get a "Quasi Class AB". T4 & T5 enhances the power output.

| improve this answer | |
\$\endgroup\$
  • \$\begingroup\$ Or is the question more general? Maybe just "output stage", or "Follower Stage"? For example "OTL" output stage is output transformerless output stage. \$\endgroup\$ – John D May 10 '14 at 17:02
  • \$\begingroup\$ Yes the question is more general, I'm not asking only for this schematic, but for all power amplifier. Also I forget to mention there are different types of this type schematics. I mean there is schematic with complementary transistors pair with powerful transistors, with medium-power transistor. \$\endgroup\$ – user3395407 May 10 '14 at 18:45
1
\$\begingroup\$

The second stage could generically be called a "voltage follower". It's a little more complicated than what we normally think of, because it handles bipolar signals; i.e., signals that can go both above and below ground.

| improve this answer | |
\$\endgroup\$
-1
\$\begingroup\$

Quasi complementary... if memory serves

| improve this answer | |
\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.