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13th August 2002, 04:50 PM
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#11 |
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diyAudio Member
Join Date: Aug 2002
Location: connecticut usa
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Mr. McBain,
Don't worry about the DC offset voltage appearing at the input of your circuit. As long as the OPA30 summer does not saturate it will keep its inverting input at essentially zero volts regardless of the offset voltage you select. Remember the inverter operates by maintaining a virtual ground at its inverting input. For the same reason, no DC will appear at your second "pure" output. the OPA30 buffers aren't needed. LOL Joe 
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