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.
This 1980s power supply uses a battery to prevent interruption of the power supply in the event of a...
We found this circuit in a 90s Electronic Design. Through a capacitor it can increase the growth...
Found in American documentation from the 1980s, this circuit uses an ADC from that time, which is...