Leaving Class A

[jacco vermeulen]

advocate

Chico,

regarde Ca

 

[Zen Mod]

........

No, seriously, nice paper. By the way, if we connect more devices parallel, the capacitance also increases, making the output more difficult to drive?

you must count on increased xconductance , with more outputs , so that ratio between No. of devices/difficulty to drive isn't quite linear

 

[Nelson Pass]

The part that is linear is the Cgd, which is quite a bit smaller than
Cgs. Driving Cgs has the same compensating effect - there's more
Cgs to drive, but it takes less voltage to drive it.

 

[Vix]

Thanks!

I got it. More is more

 

[Manu]

The resistor works fine as long as the supply isn't too noisy.

Thanks!
But I need some more help to understand :
What would be exactly the effect of a "noisy" supply?

Chico,

regarde Ca

Jacco-the-brain : sincerely admire your memory, amazing...
Thanks for link ... but in defence of my inattention I must say I was not really aware of this question. Usually you don't see what you don't know...

Manu

 

[Nelson Pass]

But I need some more help to understand :
What would be exactly the effect of a "noisy" supply?

The resistor to the supply conducts not only DC but also AC, so any
noise on the supply is injected into the output.

 

[Manu]

Thats very clear now, thank you very much ...

Manu

 

[tryonziess]

Nelson, The increased bias current is shown to be a major improvement by the graphs provided. Is there any correlation that relates to the actual heat of the output devices. Does this heat which is causing the molecular particles to move faster attribute any advantages? I know there is a practical limit here.

Very nice article, makes things much easier to understand. Tad

 

[Nelson Pass]

There is a subtle performance difference with devices running a
little hotter, but mostly we make sure that we do all our adjustments
at normal operating temperature, and that means that we often have
to re-adjust after warm-up and burn-in.

 

[kzim229]

I love this site.

 

[Nelson Pass]

Yeah, me too.

 

[lineup]

Originally posted by Nelson Pass Yeah, me too.

mee to