This circuit filters low frequency noise from the turntable motor. We found it in a 1989 documentation. The font doesn't have to be symmetrical, but it should have excellent filtering.
The 50 kHz signal generated by this circuit is applied to a low impedance inductive transducer. A...
This circuit can also use other series operational amplifiers such as MC33172, MC33174, MC35171,...
This circuit was found in an Analog Devices publication from the 1990s. The circuit performs input...