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23rd March 2005, 10:19 AM
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#11 |
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diyAudio Member
Join Date: Jan 2004
Location: n.e england
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mic pre-amp
Texas Instruments/Burr Brown do a mic pre-amp IC type INA217 which could be just the thing for a dedicated measuring mic pre-amp. It has balanced input, very low noise and a wide,flat response. They give some applications circuits in the data sheet.
I have used these for sound recording and got good results but for measuring dutys I use an unbalanced Panasonic capsule with a very stable pre-amp, rectifier and averaging circuit of my own design. |
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