Any other ideas for a class A audio power amplifier?

Amateur. Think about it, you'll see what you bungled.

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 |

In Memoriam... Duane Lee Thompson October 31, 1972 - April 20,2006 4th Child, 2nd Son, of Jim & Naomi Thompson Victim of Colon Cancer

It 404's for me.

Class AB isn't as evil as people think There are lots more places to screw up amplifier design than crossover distortion.

google groups mangles anything with an @ symbol in it. you have to make a special effort to see what was really written. (click on the ... in the original)

or maybe try this URL instead:

I had to drop in the op amps for some reason, but I got it loaded. So you use a PNP current source feeding a NPN is a common emitter gain stage with an op amp to control it. [It didn't run correctly when I simulated it.]

So why pick this over say a N-fet follower pulled on by a NFET common source current source. Obviously the N-fet follower is in a feedback loop.

I had to drop in the op amps for some reason, but I got it loaded. So you use a PNP current source feeding a NPN is a common emitter gain stage with an op amp to control it. [It didn't run correctly when I simulated it.]

So why pick this over say a N-fet follower pulled on by a NFET common source current source. Obviously the N-fet follower is in a feedback loop.

I also did a model with power op amps 11 amp curret limit. A few devices in paralell and a lot of cooling will be needed to deal with the power dissipation. I will upload that one when I get it cleaned up a bit. I was thinking peltier devices and fans for cooling.

Bob

Modular design unsing power op amps. Adjust values to limit power dissipated by each modular section. Use as many modular units as required.

snipped-for-privacy@att.net/amp5.asc

Bob

ted

Do you have some sort of objective specification for this project? You started out class A, now you are essentially parallel COTS opamps. My gut feeling is you are not going to achieve much beyond doing a "novel" design, the kind of thing you would see in Electronic Letters (if that journal still exists).

Do you have some sort of objective specification for this project? You started out class A, now you are essentially parallel COTS opamps. My gut feeling is you are not going to achieve much beyond doing a "novel" design, the kind of thing you would see in Electronic Letters (if that journal still exists).

If you run the model you will see that the circuit is running class a with one amp as the current source and the other as the current sink. I want to just use it for a monitor amplifier.

Bob

..

h o

So what is so wrong with class AB? You get better damping for one thing. Again, you seem more interested in making a novel circuit than achieving a specification.

Are you sure this design will be stable without a Zoebel?

So what is so wrong with class AB? You get better damping for one thing. Again, you seem more interested in making a novel circuit than achieving a specification.

Are you sure this design will be stable without a Zoebel?

I will find out.

Bob

That's because you're reading from Google, which munges URLs & email addresses. Get a real newsreader & these things will display correctly.

--
    W
  . | ,. w ,   "Some people are alive only because
   \\|/  \\|/     it is illegal to kill them."    Perna condita delenda est
---^----^---------------------------------------------------------------

I had to drop in the op amps for some reason, but I got it loaded. So you use a PNP current source feeding a NPN is a common emitter gain stage with an op amp to control it. [It didn't run correctly when I simulated it.]

So why pick this over say a N-fet follower pulled on by a NFET common source current source. Obviously the N-fet follower is in a feedback loop.

Playing with module packaging.

snipped-for-privacy@att.net/amplifier.pdf

Bob

snipped-for-privacy@att.net/amplifier.pdf

You do know that Yahoo is shutting town Geocities in a few months?

--
You can\'t have a sense of humor, if you have no sense!

Gross! Gag me with a spoon ;-)

What are you trying to accomplish? Specs?

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 | I love to cook with wine Sometimes I even put it in the food

=A0 =A0 ...Jim Thompson

=A0 | =A0 =A0mens =A0 =A0 |

=A0 | =A0 =A0 et =A0 =A0 =A0|

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=A0 =A0 =A0 |

My point exactly.