This 1 kHz filter was found in the March 1997 issue of Electronics Now magazine. The circuit is applicable to any operational amplifier with a dual power source.
This circuit uses an operational amplifier that is uncommon today, but it can be implemented with...
This circuit was obtained from a 1978 Practical Wireless. It generates a low frequency, low...
This filter was found in an old publication from 1977. The circuit must use a simple two-voltage source...