DC-level of mono summing amplifier should be VCOM

ojousima / poppimASiina

Portable Bluetooth audio card.

http://as.ayy.fi/Wiki/S%C3%A4%C3%A4t%C3%B6kerho/PoppimASiina

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DC-level of mono summing amplifier should be VCOM #9

Closed ojousima closed 8 years ago

ojousima commented 8 years ago

Summing amplifier takes ground referenced signal which goes below supply rails. Signals to be summed should be taken before DC-decoupling of stereo signals