simple DC Audio tone signal to AC

Thread Starter

Jim Lowinger

Joined Jun 1, 2019
I have intercom systems which use a 16 VAC power supply but the call tone signal ( and other audio ) is referenced to one leg of the transformer, which serves as the system common. The call tone is thus a DC signal. For my project I need it to be AC, but otherwise identical. I have made a simple signal inverter module that changes it to DC of the opposite polarity but ideally I need it to be AC, relative to the common. Any Ideas ?