Hey,
I am working with an audio amplifier. It has a rather low gain and needs an additional 5x or 14dB. It also has a rather low input impedance ~10K per phase. It is a differential input.
I really want to use a transformer input for the complete isolation of grounds and the CMR capabilities.
Is it possible to keep the overall input impedance high, as well as to get the additional voltage to properly drive the amplifier? I am thinking not and I will have to design an active gain stage to go in-between with high input impedance and low output impedance.
Thanks!
I am working with an audio amplifier. It has a rather low gain and needs an additional 5x or 14dB. It also has a rather low input impedance ~10K per phase. It is a differential input.
I really want to use a transformer input for the complete isolation of grounds and the CMR capabilities.
Is it possible to keep the overall input impedance high, as well as to get the additional voltage to properly drive the amplifier? I am thinking not and I will have to design an active gain stage to go in-between with high input impedance and low output impedance.
Thanks!