I have a vague memory of an artical in Radio Electronics magazine in the early 90's about using an audio amplifer IC (I think it was the lm1875) and a low noise op amp in an unusual way. I seem to remember that the power amp was in the feedback loop of the op amp, but it was almost 20 years ago so I could be wrong. I think it would have been around 1993. If anyone has a scan of the original artical or can link me to more information on this circuit technique I would greatly appreciate it.
I was pretty new to electronics at the time, but I think the jist was that using this circuit topology you got all the noise specs and low THD of the op amp, ( which I believe was a ne5534) and the power amp IC was just acting as the muscle. (again.......20 years ago, forgive me if I got it wrong).
Thanks
I was pretty new to electronics at the time, but I think the jist was that using this circuit topology you got all the noise specs and low THD of the op amp, ( which I believe was a ne5534) and the power amp IC was just acting as the muscle. (again.......20 years ago, forgive me if I got it wrong).
Thanks