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Chip Amps Amplifiers based on integrated circuits

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Old 5th October 2006, 12:05 AM   #1
diyAudio Member
Join Date: Oct 2004
Location: The high-five state
Default Newb question

I was reading this thread: BPA300 mono block finished and measured

I can't seem to find much information to satisfy my curiosity about what a DC servo is in an amplifier.
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Old 6th October 2006, 04:50 PM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
I am about to stir up a hornets nest.
The chipamp section are a lot of wallies.
If you want real information restrict most of your searches to solid state. That's where most of the knowledge lies.

Wait for it!

a DC servo tries to cancel the output offset by measuring the DC on the output and applying a cancelation voltage to the input to minimise the output offset.
If components and values are selected well, the remaining offset can be held to less than 1mV for most conditions.
regards Andrew T.
Sent from my desktop computer using a keyboard
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Old 6th October 2006, 05:03 PM   #3
diyAudio Member
Join Date: Jul 2006
Default What is a "wallie" ?

I have great respect for the forum members and how they help

each other. I do wish an experienced member could start a "New

to DIY section" to help welcome the inexperienced into the world

of DIY by answering questions, designing circuits as they do for

their peers, instead of being told; as they say

"Don't go away mad, just go away"
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Old 6th October 2006, 05:31 PM   #4
diyAudio Member
Join Date: Oct 2004
Location: The high-five state
Thanks for the replies. Now I need to find some examples to get my head around the practical application of it.
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