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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: Contd posted by RJM on December 9, 2002 at 07:21:01:
The LT1028 actually gives a noise current curve with a max that is better than the AD797 single 1KHz spot noise value - the low 1/f noise slope is important given the RIAA eq boost of low frequenciesThe input bias current is lower as well
I use 2 op amp composite amplifiers to get the desired loop gain in fewer stages with high accuracy - see Graeme "Amplifier Applications of Op Amps" (compensation is non-trivial, I don't even try to power them up without the sensor connected)
good engineering should get you within 1-2 dB of the calculated noise absent circuit errors or unanticipated external influences such as EMI
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Follow Ups
- I actually went with LT1028 over AD797 in strain gage amplifiers - jcox 12/9/0208:54:16 12/9/02 (0)
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