Re: The Larkin front end

On Wed, 08 Nov 2006 08:34:30 -0800, John Larkin wrote:
On Wed, 08 Nov 2006 15:55:59 +0000, Eeyore
SioL wrote:
"Eeyore" <rabbitsfriendsandrelations@xxxxxxxxxxx> wrote
Consider the inherent rejection of common mode signals in a differential front end. It
doesn't work so well if the signals are different sizes ( rather obviously ).

I'll use 1% caps here too.
Graham

I think I understand John.
If the first stage is a balanced opamp input, its a biq question how "balanced" its function
is as a rf detector, the interference signals are likely way out of the operational range
of that opamp. Thermocouple sounds like a very slow device. Pretty much killing
anything even remotely RF should work pretty well.

A ferrite bead won't do that.

The only complication being that it does.

It sounds to me like we're comparing lossy low-pass filters to common-mode
chokes here. Isn't that kind of like apples and tomatoes?

Thanks,
Rich

.

Relevant Pages

  • Re: The Larkin front end
    ... doesn't work so well if the signals are different sizes. ... I'll use 1% caps here too. ... I think I understand John. ... If the first stage is a balanced opamp input, its a biq question how "balanced" its function ...
    (sci.electronics.design)
  • Re: The Larkin front end
    ... doesn't work so well if the signals are different sizes. ... I'll use 1% caps here too. ... I think I understand John. ... If the first stage is a balanced opamp input, its a biq question how "balanced" its function ...
    (sci.electronics.design)
  • Re: The Larkin front end
    ... John Larkin wrote: ... doesn't work so well if the signals are different sizes. ... I'll use 1% caps here too. ... If the first stage is a balanced opamp input, its a biq question how "balanced" its function ...
    (sci.electronics.design)
  • Re: The Larkin front end
    ... doesn't work so well if the signals are different sizes. ... I'll use 1% caps here too. ... If the first stage is a balanced opamp input, its a biq question how "balanced" its function ...
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